Arash Helmi Siasi Farimani (PhD)

Micro-Structured membrane reactors for water gas shift reaction

Summary

A. Helmi, F. Gallucci, M. van Sint Annaland
Room: STW 0.35, E-mail:
a.helmi@TUe.nl

Water Gas Shift (WGS) is a widely used reaction for hydrogen production and synthesis gas upgrading. WGS is moderately exothermic reversible reaction and is expressed by:

The traditional two stage WGS process consists of a first reactor operated at high temperatures and a second reactor that works at lower temperatures following by a hydrogen separation unit such as PSA. Packed bed membrane reactors are able to couple the WGS reaction and hydrogen separation in one single unit and shift the equilibrium and thus intensify the process. Currently packed bed membrane reactors have been studied both - experimentally and theoretically at low and high temperatures ( Fig.1).

At the presence of  highly permeable membrane the extent of wall-to-bed mass transfer (concentration polarization effect) will limit the overall performance of a packed bed membrane reactor. Recently, micro-channel fixed bed  membrane reactors have been introduced because of their superior heat and mass transfer characteristics (Fig.2a and 2b).

Objective

Detail study of reactor performance of both fixed bed micro membrane reactor (Fig.2a) and fluidized bed micro-structured membrane reactor (Fig.2b) through numerical simulations and proof of principle of the two concepts at lab scale

Acknowledgements

The European Commission’s Seventh framework Programme supports this project through the Grant Agreement NMP3-LA-2011-262840 (DEMCAMER)