抄録
We performed the methanol decomposition for the purpose of the production of the hydrogen for fuel cell using a microreactor developed on the basis of a new concept of the element assembly, and examine the effect of a reactor type and reaction conditions on the methanol conversion and the hydrogen selectivity. A multi-stage type microreactor assembled with various metal (Ni,Cu,Zn) dispersed carbon membrane catalyst is constructed. Each micro space is created by inserting the membrane catalyst element between SUS plates with the thermostable gaskets. Hydrogen yield by using the microreactor was higher than that by the conventional fixed bed reactor. From several examinations for methanol decomposition experiments, it was clarified that the hydrogen yield increased by the prevention of the progress of side reaction in the microreactor. Even at the low temperature as 320°C, the methanol conversion and the hydrogen yield could reach to 86 % and 1.5 mol/mol-methanol keeping the ratio of H2 to CO into 2, respectively, by assembling 9 elements. In addition, the side reactions was successfully suppressed and both yields of methane and carbon dioxide were less than 0.1 mol/mol-methanol. Thus, it was clarified that the proposed microreactor was valid for mass production of hydrogen.
