Australia
Synergistic Hybrid Marine Renewable Energy Harvest System
Mar 2024
Publication
This paper proposes a novel hybrid marine renewable energy-harvesting system to increase energy production reduce levelized costs of energy and promote renewable marine energy. Firstly various marine renewable energy resources and state-of-art technologies for energy exploitation and storage were reviewed. The site selection criteria for each energy-harvesting approach were identified and a scoring matrix for site selection was proposed to screen suitable locations for the hybrid system. The Triton Knoll wind farm was used to demonstrate the effectiveness of the scoring matrix. An integrated energy system was designed and FE modeling was performed to assess the effects of additional energy devices on the structural stability of the main wind turbine structure. It has been proven that the additional energy structures have a negligible influence on foundation/structure deflection.
Hydrogen Impacts on Downstream Installation and Appliances
Nov 2019
Publication
The report analyses the technical impacts to end-users of natural gas in Australian distribution networks when up to 10% hydrogen (by volume) is mixed with natural gas.
The full report can be found at this link.
The full report can be found at this link.
Hydrogen Storage in Depleted Gas Reservoirs: A Comprehensive Review
Nov 2022
Publication
Hydrogen future depends on large-scale storage which can be provided by geological formations (such as caverns aquifers and depleted oil and gas reservoirs) to handle demand and supply changes a typical hysteresis of most renewable energy sources. Amongst them depleted natural gas reservoirs are the most cost-effective and secure solutions due to their wide geographic distribution proven surface facilities and less ambiguous site evaluation. They also require less cushion gas as the native residual gases serve as a buffer for pressure maintenance during storage. However there is a lack of thorough understanding of this technology. This work aims to provide a comprehensive insight and technical outlook into hydrogen storage in depleted gas reservoirs. It briefly discusses the operating and potential facilities case studies and the thermophysical and petrophysical properties of storage and withdrawal capacity gas immobilization and efficient gas containment. Furthermore a comparative approach to hydrogen methane and carbon dioxide with respect to well integrity during gas storage has been highlighted. A summary of the key findings challenges and prospects has also been reported. Based on the review hydrodynamics geochemical and microbial factors are the subsurface’s principal promoters of hydrogen losses. The injection strategy reservoir features quality and operational parameters significantly impact gas storage in depleted reservoirs. Future works (experimental and simulation) were recommended to focus on the hydrodynamics and geomechanics aspects related to migration mixing and dispersion for improved recovery. Overall this review provides a streamlined insight into hydrogen storage in depleted gas reservoirs.
Regulatory Mapping for Future Fuels
May 2020
Publication
Australia’s gas infrastructure is currently subject to regulations that were designed for a natural-gas only network system. Future Fuels CRC has released a full report and database of regulations to share exactly how Australia’s current gas regulations can be modernised to enable hydrogen biomethane and other potential future fuels.
This research thoroughly assessed Australia’s current regulatory framework to identify the regulations that will require modernisation to facilitate the use of future fuels within Australia’s energy networks and align them with the goals of Australia’s National Hydrogen Strategy. This study builds on the initial work completed as part of Australia’s National Hydrogen Strategy and creates a comprehensive regulatory map of relevant legislation across the natural gas production and supply chain which may be impacted by the addition of future fuels such as hydrogen and biomethane.
The research was delivered by RMIT University of Sydney and GPA Engineering supported by our industry and government participants APA APGA ATCO AusNet Services ENA Energy Safe Victoria Jemena and the South Australian Government.
The study’s report summarises the key issues and the direction of possible solutions. The study also created a database that holds details of legislation by state and territory as well as Commonwealth legislation and applicable Australian standards. The database is designed to be readily updated as these regulations continue to evolve.
The Australian energy industry and regulators benefit from this study by ensuring that any regulatory changes required for future fuels are identified early so that appropriate regulatory changes can be initiated and delivered. These changes will enable the many highly-regulated pilot projects happening across Australia to expand and develop under a modernised and effective regulatory environment.
You can find the full report on the Future Fuels CRC website here
This research thoroughly assessed Australia’s current regulatory framework to identify the regulations that will require modernisation to facilitate the use of future fuels within Australia’s energy networks and align them with the goals of Australia’s National Hydrogen Strategy. This study builds on the initial work completed as part of Australia’s National Hydrogen Strategy and creates a comprehensive regulatory map of relevant legislation across the natural gas production and supply chain which may be impacted by the addition of future fuels such as hydrogen and biomethane.
The research was delivered by RMIT University of Sydney and GPA Engineering supported by our industry and government participants APA APGA ATCO AusNet Services ENA Energy Safe Victoria Jemena and the South Australian Government.
The study’s report summarises the key issues and the direction of possible solutions. The study also created a database that holds details of legislation by state and territory as well as Commonwealth legislation and applicable Australian standards. The database is designed to be readily updated as these regulations continue to evolve.
The Australian energy industry and regulators benefit from this study by ensuring that any regulatory changes required for future fuels are identified early so that appropriate regulatory changes can be initiated and delivered. These changes will enable the many highly-regulated pilot projects happening across Australia to expand and develop under a modernised and effective regulatory environment.
You can find the full report on the Future Fuels CRC website here
Developing Community Trust in Hydrogen
Oct 2019
Publication
The report documents current knowledge of the social issues surrounding hydrogen projects. It reviews leading practice stakeholder engagement and communication strategies and findings from focus groups and research activities across Australia.
The full report can be found at this link.
The full report can be found at this link.
Shielded Hydrogen Passivation – A Novel Method for Introducing Hydrogen into Silicon
Sep 2017
Publication
This paper reports a new approach for exposing materials including solar cell structures to atomic hydrogen. This method is dubbed Shielded Hydrogen Passivation (SHP) and has a number of unique features offering high levels of atomic hydrogen at low temperature whilst inducing no damage. SHP uses a thin metallic layer in this work palladium between a hydrogen generating plasma and the sample which shields the silicon sample from damaging UV and energetic ions while releasing low energy neutral atomic hydrogen onto the sample. In this paper the importance of the preparation of the metallic shield either to remove a native oxide or to contaminate intentionally the surface are shown to be potential methods for increasing the amount of atomic hydrogen released. Excellent damage free surface passivation of thin oxides is observed by combining SHP and corona discharge obtaining minority carrier lifetimes of 2.2 ms and J0 values below 5.47 fA/cm2. This opens up a number of exciting opportunities for the passivation of advanced cell architectures such as passivated contacts and heterojunctions.
National Hydrogen Roadmap: Pathways to an Economically Sustainable Hydrogen Industry in Australia
Apr 2021
Publication
The National Hydrogen Roadmap provides a blueprint for the development of a hydrogen industry in Australia.
Recently there has been a considerable amount of work undertaken (both globally and domestically) seeking to quantify the economic opportunities associated with hydrogen. The National Hydrogen Roadmap takes that analysis a step further by focusing on how those opportunities can be realised.
National Hydrogen Roadmap
The National Hydrogen Roadmap provides a blueprint for the development of a hydrogen industry in Australia.
The primary objective of the Roadmap is to provide a blueprint for the development of a hydrogen industry in Australia. With a number of activities already underway it is designed to help inform the next series of investment amongst various stakeholder groups (e.g. industry government and research) so that the industry can continue to scale in a coordinated manner.
Pathways to an economically sustainable industry
The low emissions hydrogen value chain now consists of a series of mature technologies. While there is considerable scope for further R&D this level of maturity has meant that the narrative has shifted from one of technology development to market activation.
Barriers to market activation stem from a lack of supporting infrastructure and/or the cost of hydrogen supply. However both barriers can be overcome via a series of strategic investments along the value chain from both the private and public sector.
The report shows that while government assistance is needed to kick-start the industry it can become economically sustainable thereafter. This is demonstrated by first assessing the target price of hydrogen needed for it be competitive with other energy carriers and feedstocks. Second the assessment considers the current state of the industry namely the cost and maturity of the underpinning technologies and infrastructure. It then identifies the material cost drivers and consequently the key priorities and areas for investment needed to make hydrogen competitive in each of the identified markets.
The opportunity for hydrogen to compete favourably on a cost basis in local applications such as transport and remote area power systems is within reach based on potential cost reductions to 2025. Further the development of a hydrogen export industry represents a significant opportunity for Australia and a potential 'game changer' for the local industry and the broader energy sector due to associated increases in scale."
You can read the full report on the CSIRO website at this link
Recently there has been a considerable amount of work undertaken (both globally and domestically) seeking to quantify the economic opportunities associated with hydrogen. The National Hydrogen Roadmap takes that analysis a step further by focusing on how those opportunities can be realised.
National Hydrogen Roadmap
The National Hydrogen Roadmap provides a blueprint for the development of a hydrogen industry in Australia.
The primary objective of the Roadmap is to provide a blueprint for the development of a hydrogen industry in Australia. With a number of activities already underway it is designed to help inform the next series of investment amongst various stakeholder groups (e.g. industry government and research) so that the industry can continue to scale in a coordinated manner.
Pathways to an economically sustainable industry
The low emissions hydrogen value chain now consists of a series of mature technologies. While there is considerable scope for further R&D this level of maturity has meant that the narrative has shifted from one of technology development to market activation.
Barriers to market activation stem from a lack of supporting infrastructure and/or the cost of hydrogen supply. However both barriers can be overcome via a series of strategic investments along the value chain from both the private and public sector.
The report shows that while government assistance is needed to kick-start the industry it can become economically sustainable thereafter. This is demonstrated by first assessing the target price of hydrogen needed for it be competitive with other energy carriers and feedstocks. Second the assessment considers the current state of the industry namely the cost and maturity of the underpinning technologies and infrastructure. It then identifies the material cost drivers and consequently the key priorities and areas for investment needed to make hydrogen competitive in each of the identified markets.
The opportunity for hydrogen to compete favourably on a cost basis in local applications such as transport and remote area power systems is within reach based on potential cost reductions to 2025. Further the development of a hydrogen export industry represents a significant opportunity for Australia and a potential 'game changer' for the local industry and the broader energy sector due to associated increases in scale."
You can read the full report on the CSIRO website at this link
Shipping the Sunshine: An Open-source Model for Costing Renewable Hydrogen Transport from Australia
Apr 2022
Publication
Green hydrogen (H2) is emerging as a future clean energy carrier. While there exists significant analysis on global renewable (and non-renewable) hydrogen generation costs analysis of its transportation costs irrespective of production method is still limited. Complexities include the different forms in which hydrogen can be transported the limited experience to date in shipping some of these carrier forms the trade routes potentially involved and the possible use of different shipping fuels. Herein we present an open-source model developed to assist stakeholders in assessing the costs of shipping various forms of hydrogen over different routes. It includes hydrogen transport in the forms of liquid hydrogen (LH2) ammonia liquified natural gas (LNG) methanol and liquid organic hydrogen carriers (LOHCs). It considers both fixed and variable costs including port fees possible canal usage charges fuel costs ship capital and operating costs boil-off losses and possible environmental taxes among many others. The model is applied to the Rotterdam-Australia route as a case study revealing ammonia ($0.56/kgH2) and methanol ($0.68/kgH2) as the least expensive hydrogen derivatives to transport followed by liquified natural gas ($1.07/kgH2) liquid organic hydrogen carriers ($1.37/kgH2) and liquid hydrogen ($2.09/kgH2). While reducing the transportation distance led to lower shipping costs we note that the merit order of assumed underlying shipping costs remain unchanged. We also explore the impact of using hydrogen (or the hydrogen carrier) as a low/zero carbon emission fuel for the ships which led to lowering of costs for liquified natural gas ($0.88/kgH2) a similar cost for liquid hydrogen ($2.19/kgH2) and significant increases for the remainder. Given our model is open-sourced it can be adapted globally and updated to match the changing cost dynamics of the emerging green hydrogen market.
Cross-regional Drivers for CCUS Deployment
Jul 2020
Publication
CO2 capture utilization and storage (CCUS) is recognized as a uniquely important option in global efforts to control anthropogenic greenhouse-gas (GHG) emissions. Despite significant progress globally in advancing the maturity of the various component technologies and their assembly into full-chain demonstrations a gap remains on the path to widespread deployment in many countries. In this paper we focus on the importance of business models adapted to the unique technical features and sociopolitical drivers in different regions as a necessary component of commercial scale-up and how lessons might be shared across borders. We identify three archetypes for CCUS development—resource recovery green growth and low-carbon grids—each with different near-term issues that if addressed will enhance the prospect of successful commercial deployment. These archetypes provide a framing mechanism that can help to translate experience in one region or context to other locations by clarifying the most important technical issues and policy requirements. Going forward the archetype framework also provides guidance on how different regions can converge on the most effective use of CCUS as part of global deep-decarbonization efforts over the long term.
Room Temperature Metal Hydrides for Stationary and Heat Storage Applications: A Review
Apr 2021
Publication
Hydrogen has been long known to provide a solution toward clean energy systems. With this notion many efforts have been made to find new ways of storing hydrogen. As a result decades of studies has led to a wide range of hydrides that can store hydrogen in a solid form. Applications of these solid-state hydrides are well-suited to stationary applications. However the main challenge arises in making the selection of the Metal Hydrides (MH) that are best suited to meet application requirements. Herein we discuss the current state-of-art in controlling the properties of room temperature (RT) hydrides suitable for stationary application and their long term behavior in addition to initial activation their limitations and emerging trends to design better storage materials. The hydrogen storage properties and synthesis methods to alter the properties of these MH are discussed including the emerging approach of high-entropy alloys. In addition the integration of intermetallic hydrides in vessels their operation with fuel cells and their use as thermal storage is reviewed.
Carbon Capture and Storage in the USA: The Role of US Innovation Leadership in Climate-technology Commercialization
Nov 2019
Publication
To limit global warming and mitigate climate change the global economy needs to decarbonize and reduce emissions to net-zero by mid-century. The asymmetries of the global energy system necessitate the deployment of a suite of decarbonization technologies and an all-of-the-above approach to deliver the steep CO2 -emissions reductions necessary. Carbon capture and storage (CCS) technologies that capture CO2 from industrial and power-plant point sources as well as the ambient air and store them underground are largely seen as needed to address both the flow of emissions being released and the stock of CO2 already in the atmosphere. Despite the pressing need to commercialize the technologies their large-scale deployment has been slow. Initial deployment however could lead to near-term cost reduction and technology proliferation and lowering of the overall system cost of decarbonization. As of November 2019 more than half of global large-scale CCS facilities are in the USA thanks to a history of sustained government support for the technologies. Recently the USA has seen a raft of new developments on the policy and project side signalling a reinvigorated push to commercialize the technology. Analysing these recent developments using a policy-priorities framework for CCS commercialization developed by the Global CCS Institute the paper assesses the USA’s position to lead large-scale deployment of CCS technologies to commercialization. It concludes that the USA is in a prime position due to the political economic characteristics of its energy economy resource wealth and innovation-driven manufacturing sector.
The Role of Hydrogen on the Behavior of Intergranular Cracks in Bicrystalline α-Fe Nanowires
Jan 2021
Publication
Hydrogen embrittlement (HE) has been extensively studied in bulk materials. However little is known about the role of H on the plastic deformation and fracture mechanisms of nanoscale materials such as nanowires. In this study molecular dynamics simulations are employed to study the influence of H segregation on the behavior of intergranular cracks in bicrystalline α-Fe nanowires. The results demonstrate that segregated H atoms have weak embrittling effects on the predicted ductile cracks along the GBs but favor the cleavage process of intergranular cracks in the theoretically brittle directions. Furthermore it is revealed that cyclic loading can promote the H accumulation into the GB region ahead of the crack tip and overcome crack trapping thus inducing a ductile-to-brittle transformation. This information will deepen our understanding on the experimentally-observed H-assisted brittle cleavage failure and have implications for designing new nanocrystalline materials with high resistance to HE.
A Critical Study of Stationary Energy Storage Policies in Australia in an International Context: The Role of Hydrogen and Battery Technologies
Aug 2016
Publication
This paper provides a critical study of current Australian and leading international policies aimed at supporting electrical energy storage for stationary power applications with a focus on battery and hydrogen storage technologies. It demonstrates that global leaders such as Germany and the U.S. are actively taking steps to support energy storage technologies through policy and regulatory change. This is principally to integrate increasing amounts of intermittent renewable energy (wind and solar) that will be required to meet high renewable energy targets. The relevance of this to the Australian energy market is that whilst it is unique it does have aspects in common with the energy markets of these global leaders. This includes regions of high concentrations of intermittent renewable energy (Texas and California) and high penetration rates of residential solar photovoltaics (PV) (Germany). Therefore Australian policy makers have a good opportunity to observe what is working in an international context to support energy storage. These learnings can then be used to help shape future policy directions and guide Australia along the path to a sustainable energy future.
Hybrid Water Electrolysis: A New Sustainable Avenue for Energy-Saving Hydrogen Production
Oct 2021
Publication
Developing renewable energy-driven water splitting for sustainable hydrogen production plays a key role in achieving the carbon neutrality goal. Nevertheless the efficiency of traditional pure water electrolysis is severely hampered by the anodic oxygen evolution reaction (OER) due to its sluggish kinetics. In this context replacing OER with thermodynamically more favorable oxidation reactions to produce hydrogen via hybrid water electrolysis becomes an energy-saving hydrogen production scheme. Here the recent advances in hybrid water electrolysis are critically reviewed. First the fundamentals of electrochemical oxidation of typical organic molecules such as urea hydrazine and biomass are presented. Then the recent achievements in electrocatalysts for hybrid water electrolysis are introduced with an emphasis on outlining catalyst design strategies and the correlation between catalyst structure and performance. Finally future perspectives in this field for a sustainable hydrogen economy are proposed.
Australia's National Hydrogen Strategy
Nov 2019
Publication
Australia’s National Hydrogen Strategy sets a vision for a clean innovative safe and competitive hydrogen industry that benefits all Australians. It aims to position our industry as a major player by 2030.<br/>The strategy outlines an adaptive approach that equips Australia to scale up quickly as the hydrogen market grows. It includes a set of nationally coordinated actions involving governments industry and the community.
Designing Optimal Integrated Electricity Supply Configurations for Renewable hydrogen Generation in Australia
Jun 2021
Publication
The high variability and intermittency of wind and solar farms raise questions of how to operate electrolyzers reliably economically and sustainably using pre-dominantly or exclusively variable renewables. To address these questions we develop a comprehensive cost framework that extends to include factors such as performance degradation efficiency financing rates and indirect costs to assess the economics of 10 MW scale alkaline and proton-exchange membrane electrolyzers to generate hydrogen. Our scenario analysis explores a range of operational configurations considering (i) current and projected wholesale electricity market data from the Australian National Electricity Market (ii) existing so-lar/wind farm generation curves and (iii) electrolyzer capital costs/performance to determine costs of H2production in the near (2020–2040) and long term(2030–2050). Furthermore we analyze dedicated off-grid integrated electro-lyzer plants as an alternate operating scenario suggesting oversizing renewable nameplate capacity with respect to the electrolyzer to enhance operational capacity factors and achieving more economical electrolyzer operation.
Where Does Hydrogen Fit in a Sustainable Energy Economy?
Jul 2012
Publication
Where does hydrogen fit into a global sustainable energy strategy for the 21st century as we face the enormous challenges of irreversible climate change and uncertain oil supply? This fundamental question is addressed by sketching a sustainable energy strategy that is based predominantly on renewable energy inputs and energy efficiency with hydrogen playing a crucial and substantial role. But this role is not an ex -distributed hydrogen production storage and distribution centres relying on local renewable energy sources and feedstocks would be created to avoid the need for an expensive long-distance hydrogen pipeline system. There would thus be complementary use of electricity and hydrogen as energy vectors. Importantly bulk hydrogen storage would provide the strategic energy reserve to guarantee national and global energy security in a world relying increasingly on renewable energy; and longer-term seasonal storage on electricity grids relying mainly on renewables. In the transport sector a 'horses for courses' approach is proposed in which hydrogen fuel cell vehicles would be used in road and rail vehicles requiring a range comparable to today's petrol and diesel vehicles and in coastal and international shipping while liquid hydrogen would probably have to be used in air transport. Plug-in battery electric vehicles would be reserved for shorter-trips. Energy-economic-environmental modelling is recommended as the next step to quantify the net benefits of the overall strategy outlined.
Concepts for Improving Hydrogen Storage in Nanoporous Materials
Feb 2019
Publication
Hydrogen storage in nanoporous materials has been attracting a great deal of attention in recent years as high gravimetric H2 capacities exceeding 10 wt% in some cases can be achieved at 77 K using materials with particularly high surface areas. However volumetric capacities at low temperatures and both gravimetric and volumetric capacities at ambient temperature need to be improved before such adsorbents become practically viable. This article therefore discusses approaches to increasing the gravimetric and volumetric hydrogen storage capacities of nanoporous materials and maximizing the usable capacity of a material between the upper storage and delivery pressures. In addition recent advances in machine learning and data science provide an opportunity to apply this technology to the search for new materials for hydrogen storage. The large number of possible component combinations and substitutions in various porous materials including Metal-Organic Frameworks (MOFs) is ideally suited to a machine learning approach; so this is also discussed together with some new material types that could prove useful in the future for hydrogen storage applications.
Application of Hydrides in Hydrogen Storage and Compression: Achievements, Outlook and Perspectives
Feb 2019
Publication
José Bellosta von Colbe,
Jose-Ramón Ares,
Jussara Barale,
Marcello Baricco,
Craig Buckley,
Giovanni Capurso,
Noris Gallandat,
David M. Grant,
Matylda N. Guzik,
Isaac Jacob,
Emil H. Jensen,
Julian Jepsen,
Thomas Klassen,
Mykhaylo V. Lototskyy,
Kandavel Manickam,
Amelia Montone,
Julian Puszkiel,
Martin Dornheim,
Sabrina Sartori,
Drew Sheppard,
Alastair D. Stuart,
Gavin Walker,
Colin Webb,
Heena Yang,
Volodymyr A. Yartys,
Andreas Züttel and
Torben R. Jensen
Metal hydrides are known as a potential efficient low-risk option for high-density hydrogen storage since the late 1970s. In this paper the present status and the future perspectives of the use of metal hydrides for hydrogen storage are discussed. Since the early 1990s interstitial metal hydrides are known as base materials for Ni – metal hydride rechargeable batteries. For hydrogen storage metal hydride systems have been developed in the 2010s [1] for use in emergency or backup power units i. e. for stationary applications.<br/>With the development and completion of the first submarines of the U212 A series by HDW (now Thyssen Krupp Marine Systems) in 2003 and its export class U214 in 2004 the use of metal hydrides for hydrogen storage in mobile applications has been established with new application fields coming into focus.<br/>In the last decades a huge number of new intermetallic and partially covalent hydrogen absorbing compounds has been identified and partly more partly less extensively characterized.<br/>In addition based on the thermodynamic properties of metal hydrides this class of materials gives the opportunity to develop a new hydrogen compression technology. They allow the direct conversion from thermal energy into the compression of hydrogen gas without the need of any moving parts. Such compressors have been developed and are nowadays commercially available for pressures up to 200 bar. Metal hydride based compressors for higher pressures are under development. Moreover storage systems consisting of the combination of metal hydrides and high-pressure vessels have been proposed as a realistic solution for on-board hydrogen storage on fuel cell vehicles.<br/>In the frame of the “Hydrogen Storage Systems for Mobile and Stationary Applications” Group in the International Energy Agency (IEA) Hydrogen Task 32 “Hydrogen-based energy storage” different compounds have been and will be scaled-up in the near future and tested in the range of 500 g to several hundred kg for use in hydrogen storage applications.
Carbon Capture and Storage (CCS): The Way Forward
Mar 2018
Publication
Mai Bui,
Claire S. Adjiman,
André Bardow,
Edward J. Anthony,
Andy Boston,
Solomon Brown,
Paul Fennell,
Sabine Fuss,
Amparo Galindo,
Leigh A. Hackett,
Jason P. Hallett,
Howard J. Herzog,
George Jackson,
Jasmin Kemper,
Samuel Krevor,
Geoffrey C. Maitland,
Michael Matuszewski,
Ian Metcalfe,
Camille Petit,
Graeme Puxty,
Jeffrey Reimer,
David M. Reiner,
Edward S. Rubin,
Stuart A. Scott,
Nilay Shah,
Berend Smit,
J. P. Martin Trusler,
Paul Webley,
Jennifer Wilcox and
Niall Mac Dowell
Carbon capture and storage (CCS) is broadly recognised as having the potential to play a key role in meeting climate change targets delivering low carbon heat and power decarbonising industry and more recently its ability to facilitate the net removal of CO2 from the atmosphere. However despite this broad consensus and its technical maturity CCS has not yet been deployed on a scale commensurate with the ambitions articulated a decade ago. Thus in this paper we review the current state-of-the-art of CO2 capture transport utilisation and storage from a multi-scale perspective moving from the global to molecular scales. In light of the COP21 commitments to limit warming to less than 2 °C we extend the remit of this study to include the key negative emissions technologies (NETs) of bioenergy with CCS (BECCS) and direct air capture (DAC). Cognisant of the non-technical barriers to deploying CCS we reflect on recent experience from the UK's CCS commercialisation programme and consider the commercial and political barriers to the large-scale deployment of CCS. In all areas we focus on identifying and clearly articulating the key research challenges that could usefully be addressed in the coming decade.
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