Catalyst for methanol oxidation and reforming for hydrogen making, manufacture method and uses

Abstract

The oxidation reforming catalyst to prepare hydrogen from carbinol comprises copper oxide 0.1-10w.t%, and solid solution composed of zinc oxide 5-60w.t% and chrome oxide 3-40%, which can be carried on alumina, zirconia, cerium oxide and other carriers with weight of 100-(Cu+ZnO+Cr2O3)%. The opposite method is coprecipitation or rapid decomposition. The hydrogen making reaction needs condition as temperature 280-400Deg, normal pressure to 2.0MPa, airspeed 1000-5000hr-1, and the mole proportion is water: carbinol=1-3.0:0.1-1.

Description

technical field [0001] The invention relates to the hydrogen production technology by the partial oxidation of methanol, in particular to a catalyst with high stability, high selectivity and low copper. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above-mentioned catalyst in the partial oxidation of methanol to produce hydrogen. Background technique [0004] The production of methanol from hydrogen is an eye-catching research project in the fields of energy and chemical industry in the past 20 to 30 years. Especially in recent years, with the development of proton exchange membrane fuel cells, the technical problems of its hydrogen supply have become increasingly prominent, and methanol is considered to be a good hydrogen carrier. Methanol hydrogen production technology has become a research and development hotspot at home and abroad. The core of it...

AI Technical Summary

Problems solved by technology

However, this type of catalyst has two defects: 1) due to the low melting point of copper, CuO in the copper-based catalyst is reduced to Cu and sintered

Although it has been reported in the literature in recent years, the addition of Mn, Cr, Zn and other additives to the catalyst can keep the surface of the catalyst Cu 0 and Cu + species, thereby increasing the catalytic activity, or Al 2 o 3 , ZrO 2 , CeO 2 、TiO 2 As a carrier to improve stability, but CuO is the active component of the copper-based catalyst, the stability problem has not been solved, especially in the partial oxidation reforming atmosphere in the presence of oxygen is more prone to deactivation

2) Although the use of low temperature is beneficial to the stability of the copper-based catalyst, the low temperature is not conducive to the endothermic hydrogen production reaction.

The increase of shift reaction process makes the whole methanol hydrogen production process more complicated, which is not conducive to mobile hydrogen production hydrogen source