Combustion:

Design and Manufacturing

  • Novel technology to control the fire and explosion hazards of hydrogen fuel

    Novel technology to control the fire and explosion hazards of hydrogen fuel

    Supervisor: Dr Y Wu, Prof M Pourkashanian,  K Hughes

    Safe pressure relief systems are essential to protect high pressure storage tanks in emergency situations. Hydrogen fuel has wide flammability limits and very low minimum ignition energy; therefore it could easily be ignited during the pressure release phase using the traditional pressure systems and therefore poses a significant fire and explosion hazard – both to the storage tanks themselves and to surrounding equipment and buildings. This project will develop advanced hydrogen pressure relief systems, incorporating some novel safety measures to prevent fires and explosions during hydrogen tank pressure relief processes. The project will involve experimental investigations and chemical kinetic modelling of the mixtures of hydrogen/hydrocarbon/quenching agent.

     

  • Novel technology to control the fire and explosion hazards of hydrogen fuel

    Novel cathode electrodes for PEM fuel cells

    Supervisor: Professor Mohamed Pourkashanian, Professor Lin Ma, Dr Kevin Hughes and Dr Mohammed S Ismail

    Proton exchange membrane (PEM) fuel cells can operate at low temperatures and are scalable. Therefore, they can be used in a wide range of applications, such as portable, automotive and stationary applications. The cathode electrode is the main source of performance loss in PEM fuel cells. This is due to low utilisation of the catalyst and the slow reaction rate. The main objective of this project is to optimise the structure of the cathode electrode to substantially increase its utilisation. Modelling tools will be used to optimise the structures of the catalyst before synthesising and testing them.

    For further information please contact Professor Derek B Ingham on d.ingham@sheffield.ac.uk

  • Novel technology to control the fire and explosion hazards of hydrogen fuel

    Nanoscale imaging of the cathode electrodes used in PEM fuel cells

    Supervisor: Professor Mohamed Pourkashanian, Professor Lin Ma, Dr Kevin Hughes and Dr Mohammed S Ismail

     

    Proton exchange membrane (PEM) fuel cells are a promising clean power conversion technology as they are efficient and can operate at low temperatures. Therefore, they can be used in a wide range of portable, automotive and stationary applications. The cathode electrode is the main source of performance loss in PEM fuel cells and this is due to low utilisation of the catalyst and the slow reaction rate. The main objective of this project is nanoscale image the normally-used cathode electrodes using X-ray computed tomography and/or Focused Ion Beam Scanning Electron microscopy (FIB-SEM). These images will be used to obtain insights on how to improve the performance of the cathode electrodes through, for example, performing pore-scale simulations and extracting effective morphological parameters.

     

  • Novel technology to control the fire and explosion hazards of hydrogen fuel

    Efficient PEM fuel cells for portable applications

    Supervisor: Supervisor: Professor Mohamed Pourkashanian, Professor Lin Ma, Dr Kevin Hughes and Dr Mohammed S Ismail

    Proton exchange membrane (PEM) fuel cells are an efficient technology which can be used in a wide portable, automotive and stationary applications. Due to its simplicity and relatively high efficiency, the use of the air-breathing PEM fuel cells, where oxygen is directly supplied to the fuel cell from the ambient, to power small electronic devices such as smartphones and notebooks is appealing. In such applications, such types of fuel cells could either replace the rechargeable batteries or charge them. The main objective of this project is to enhance the efficiency and the cost-effectiveness of the air-breathing fuel cells through employing new designs and/or materials. The project could involve building a prototype of the fuel cell system that powers a small electronic device and/or producing a mathematical/CFD model.