Study of liquid phase reforming of methanol by water for production of high purity hydrogen

甲醇液相重整是设计新制氢工艺的一个很有前途的解决方案。与通常的蒸汽重整反应相比，液相重整反应的优点是使反应设备更加紧凑和简单，并且不需要甲醇水溶液的蒸发能量。在间歇反应器中，采用悬浮在溶液沸点附近的粉末催化剂，研究了不同负载金属催化剂上甲醇与水的液相重整。我们研究的主要目的是开发更简单、更紧凑的生产纯氢的系统。在我们对甲醇重整反应的研究中，过渡金属添加Pt基团的催化剂比未改性的Pt催化剂表现出更高的活性。在加入过渡金属氧化物的单层上，高度分散的Pt表现出优异的重整反应活性。研究了不同负载型Pt-Ru双金属催化剂对甲醇液相重整催化活性的负载效应。采用常规浸渍法制备SiO2、TiO2、Al2O3、MgO、CeO2和ZrO2作为载体材料。碱性氧化物载体提高了对CO2的选择性，而酸性载体抑制了催化活性和选择性。

A liquid phase reforming of methanol is one of the promising solutions for designing new process of hydrogen production. As compared with the usual steam reforming reaction, the advantages of liquid phase reforming are making more compact and simple reaction equipment and needless of the evaporation energy of methanol aqueous solution. In this study, the liquid phase reforming of methanol with water over various supported metal catalyst in the batch reactor with suspended powder catalyst around boiling point of solution was studied. The main purpose of our study is the development of more simple and compact system for production of pure hydrogen. In our study on the methanol reforming reaction, Transition metal added Pt group catalyst exhibited much higher activity than non-modified Pt catalysts. Highly dispersed Pt species on the monolayer of added transition metal oxide exhibited excellent activity for the reforming reaction. Support effect for the catalytic activity of liquid phase reforming of methanol with water was investigated over various supported Pt-Ru bimetallic catalysts. The SiO2, TiO2, Al2O3, MgO, CeO2 and ZrO2 were used as support materials by conventional impregnation method. Basic oxide supports improved the selectivity to CO2, whereas acidic supports suppressed the catalytic activity and selectivity.