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New UK Energy & Fuels 2050 transportation roadmap highlights important role of drop-in fuels and power-to-gas

Professor Neville Jackson, Ricardo’s chief technology and innovation officer, presented the results of a research project carried out by the Automotive Council UK to establish a long-term (to 2050) transition from current gasoline and diesel fuels to a majority renewable energy portfolio. Inputs to the new Energy & Fuels Roadmap included recent UK & EU studies on automotive technologies, as well as roadmaps for passenger cars, commercial vehicles and internal combustion engines previously published by the Automotive Cuncil.

The research, presented at last week’s Open Forum organized by the Society of Motor Manufacturers and Traders (SMMT) in London, aimed to create a high level consensus view for the future of transport energy in the UK. Chaired by Professor Jackson of Ricardo, the research team that produced the report was made up of representatives drawn from a wide range of industry stakeholder organizations including BP, Shell, Jaguar LandRover, Caterpillar, the Energy Technologies Institute, the Low Carbon Vehicle Partnership, E4tech, Element Energy and Associated British Foods.

Summary of the roadmap to 2050. The roadmap shows a long-term transition from current gasoline & diesel fuels to a majority renewable energy portfolio to meet the 80% reduction in GHG target for 2050. Drop-in renewable fuels, power-to-gas for hydrogen production and increased use of EVs and PHEVs are key elements. The roadmap notes that renewable electricity way be used to generate H2 (power-to-gas), which in turn may be better used to produce lower-carbon footprint liquid fuels rather than for direct use in vehicles. Click to enlarge.

In the near term, the roadmap sees the renewable content of gasoline moving to E10, subject to the Renewable Transport Obligation (RTO) target being raised by Government. Beyond this, there is a strong preference on the part of auto industry that further increases in bio content should be made using drop-in fuels—i.e., renewable hydrocarbon fuels that can be blended with existing petroleum-based products without major changes or investments required to engine systems, storage and distribution systems.

On electrification, the roadmap shows increasing use of battery electric and plug-in vehicles but also highlights the potential use of power-to-gas (PTG) technologies. These would enable electrical power—not least possible surpluses generated from intermittent renewable resources—to be used to create hydrogen and synthetic methane.

As the roadmap illustrates, however, these potential future sources of renewable gas may be best used in the refinery process to reduce the carbon content of liquid fuels. While this may at first sight appear counter-intuitive, the team consider that this approach may provide a more sustainable and lower infrastructure investment option than using renewable gases directly in transport to displace fossil sources of natural gas.

The roadmap presents this scenario of drop-in renewables and power-to-gas components in a significantly reduced carbon fuel chain of liquid fuels distributed, stored and performing in broadly similar terms to today’s fossil based products, as providing a highly practical means of moving towards a much more sustainable future for transport. It will however require fuel specifications and standards to be defined at the minimum of an EU and ideally a global scale.

The roadmap also suggests that “niche” fuels (LPG/CNG/LNG/H2/B30/E85) only likely to move into mainstream if supported by policy drivers and associated economics/ availability/ supply infrastructure.

The energy and fuels roadmap that the Automotive Council is presenting today, sets out what we believe to be the most plausible and attractive pathways for the UK to achieve its targeted 80 percent reduction in total greenhouse gas emissions. This vision cannot, however, be realized without coordinated efforts on the part of industry, government and regulators. By combining the views and opinions of experts drawn from an extremely wide range of stakeholder organizations and industries, we believe that we have been able to demonstrate that the result is indeed achievable if the right economic, policy and regulatory conditions are put in place.

—Professor Neville Jackson



A reciprocating internal combustion engine with a high compression ratio of say 18.0 and burning fuel per cycle before the moving piston reaches the TDC and limiting the combustion temperature below the critical temperature of NOx formation can achieve a indicated fuel conversion efficiency (IFCE) of 68.5% without the need for aftertreatment. Therefore, there is no need for electrification or hybrid engine system.

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