Methane Steam Reforming by Hydrogen-permselective Membrane Reactor with a carbon dioxide absorbent

摘要

Methane steam reforming (MSR) is one of the most important chemical processes in hydrogenproduction. To improve the conversion of methane to hydrogen, a hydrogen-permselective membranereactor with a carbon dioxide absorbent was proposed and investigated. The conversion at 893K in thereactor with CaO as absorbent was almost equal to that at above 1000K in the conventional reactor. Itwas found that gas mixture through the CaO-absorbent can be utilized in a membrane reactor withoutthe conversion drop occurred at lower temperatures. Exergy analyses indicated that the a large portion ofexergy loss for hydrogen production was chemical exergy loss in the case without methane recycle,while thermal exergy loss in the case with recycle use. The exergy loss of this process using thehydrogen-permselective membrane reactor with the CaO-absorbent was estimated about 70% of that bythe convensional catalytic reactor.