Project Objectives

On the road towards a hydrogen economy it will be vital to reduce hydrogen production costs and build up a hydrogen infrastructure. Small-scale, decentralized hydrogen production units at refuelling stations can contribute to reach these goals, thus accelerating market introduction of hydrogen-powered vehicles.

The technical targets of the NEMESIS2+ project are:

  • Development of a pre-commercial hydrogen generator (50 Nm3/h H2) to be integrated into existing refuelling stations
  • Stable long-term operating conditions and high H2-efficiencies
  • Fast start-up times
  • Hydrogen purity of 5.0 (99,999 %)
  • Ensure high overall system efficiency (> 80 %)
  • Reduce hydrogen production costs
    • Keep material costs below 250.000 € per unit / 5.000 € per Nm3/h of H2 produced
    • Hydrogen production costs < 4.00 € per kg

 The following approach will be used in NEMESIS 2+ to achieve the main goals:

 Process level:

  • Reduction of system complexity by removing the pre-reformer unit
  • Focus on liquid fuels only as common fuels at refuelling stations with high energy density
  • Inclusion of biodiesel as a renewable energy source with low sulphur content and biodiesel-blends
  • Consideration of sulphur free GtL diesel in order to uncouple the difficulties related to the simultaneous presence of sulphur and carbon-rich molecules in regular diesel
  • Process strategy of risk sharing between development of liquid desulphurisation and improvement of sulphur resistance as well as catalyst regeneration (reformer and WGS)
  • Integration of water gas shift stage to increase overall hydrogen efficiency
  • High extent of thermal integration of system components to increase fuel processing efficiency

Component/prototype level:

  • Scale-up of liquid desulphurisation technology by adsorption that has been developed in NEMESIS at a lab-scale level to prototype-level
  • Development of liquid desulphurisation prototype module for continuous operation
  • Redesign of reformer with integrated dual fuel burner and water gas shift stage
  • Identification of optimum operating conditions to work with diesel and biodiesel
  • Increase of reformer operating pressure from 6 to 12 bars
  • Energy efficient liquid pressurization and atomization
  • Long-term testing of hydrogen generator (1000 hours)

Functional material level:

  • Development of efficient regeneration strategies for the liquid desulphurisation adsorbent
  • Increase of catalyst lifetime by increase of sulphur-tolerance and development of catalyst regeneration strategies
  • Enlargement of catalyst operating range to work with diesel and biodiesel