The first MR type facilitates the in–situ
removal of one of the products (Figure 11.a). For example, for steam reforming reactions, H2
Gallucci, F., Basile, A. and Hai, F. I. "Introduction—A review of Membrane reactors" in Membranes for membrane reactors:
Preparation, Optimization and Selection (eds. Basile, A., Gallucci, F.), page 1-62, Wiley InterScience, USA, 2011.
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yield and CO2 product selectivity in TRs are limited by Thermodynamics. By selective removal
of H2 from the reaction side, the thermodynamic equilibrium restrictions can be overcome. Due
to the shift effect, both high H2 yields and high CO2 selectivities can be achieved. Moreover, this
effect allows operation at milder reaction conditions in terms of temperature and pressure