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Engineering Doctorate (EngD): New exhaust gas clean up systems for the combustion of new, low carbon fuels in heavy duty engines

   Department of Mechanical Engineering

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  Prof W Nimmo, Prof K Hughes, Dr Abby Samson  No more applications being accepted  Funded PhD Project (Students Worldwide)

About the Project

As a company, Eminox’s global strategy is to develop exhaust after-treatment systems (EATS) for on-road, non-road mobile machinery (NRMM), rail, marine and power generation internal combustion engines (ICE) that will eventually adopt Carbon-Free Alternative Fuels such as NH3 and H2.

We now wish to sponsor a PhD student to work on fundamental aspects of underpinning knowledge that will help us to develop our business for a cleaner, low carbon future. https://eminox.com/


Fuel decarbonisation will impact significantly the global reduction of anthropogenic carbon dioxide (CO2) emissions the main source of greenhouse gas (GHGs) emissions. Ammonia (NH3) is considered a potential carbon-free fuel and a carbon-free energy vector (carrier). Large scale NH3 production, storage and distribution has been commercially established on a global scale for over a century. NH3 can be produced sustainably from waste sources, and renewable energy recognised as green-ammonia (G-NH3). Fuel blending of NH3 with either H2, LPG (liquified petroleum gas) or diesel has the potential to enhance the combustion properties for NH3. An understanding of the engine in-cylinder thermo-chemical kinetics governing NH3 NOx and Thermal-NOx formation for NH3 and NH3/Fuel Blends (H2, natural gas LPG, diesel) is required. In addition, the NOx reduction efficiencies for selective catalytic reduction (SCR) systems needs evaluation, to understand if changes to the catalyst formulation are required for effectively treating exhaust gas produced from NH3 -ICE and NH3/Fuel Blend-ICE. Therefore, it is critical for Eminox to develop a detailed understanding of the system requirements for an exhaust after-treatment system suitable for NH3-ICE and NH3/Fuel Blends-ICE.

Proposed project

In brief, the objectives of the studentship are as follows:

  • Modeling - Develop and utilise thermo-kinetic models to investigate NOx formation mechanisms occurring during the combustion of for pure NH3 and NH3 /fuel blends (H2, LPG, Diesel) at a range of air-fuel equivalence ratios, temperatures and pressures.
  • Experimental evaluation of NOx reduction efficiencies for an SCR (selective catalytic reduction) system by way of a fixed bed reactor (University of Sheffield). Simulating engine exhaust gas emissions resultant from combusting pure NH3 and a NH3/fuel blends (H2, nat. gas LPG, Diesel) for a range of fuel-equivalence ratios.

The project will be part of the EPSRC-supported Centre for Doctoral Training in Resilient Decarbonised Fuel Energy Systems. The student who undertakes it will be one of a cohort of over 50 students in a broad range of disciplines across the Universities of Sheffield, Nottingham and Cardiff 

Funding Notes

Funding Awarded via the EPSRC Centre for Doctoral Training (CDT) in Resilient Decarbonised Fuel Energy Systems and Eminox Ltd
The funding will include a student stipend top-up of £3,500 per annum over the standard EPSRC rate.


UK Hydrogen Strategy: https://www.gov.uk/government/publications/uk-hydrogen-strategy
CPH2’s website: https://www.cph2.com/about/
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