Method for fast preparing dimethyl ether steam reforming hydrogen production catalyst by virtue of alternate microwave

Abstract

The invention discloses a method for fast preparing dimethyl ether steam reforming hydrogen production catalyst by virtue of alternate microwave. The method comprises the following steps: (1) preparing a mixed water solution of Cu(NO3)2 and M metal nitrate, wherein M metal is selected from iron, cobalt, nickel, manganese, lanthanum, chromium and zinc, the mol ratio of M:Cu in the mixed water solution is not less than 0 and not more than 1, and the total concentration range of Cu+M in the solution is 0.025mol/L-10.2mol/L; adding a carrier into the mixed water solution, and uniformly dispersing; (2) placing the mixed water solution in a microwave oven to alternatively heat; (3) drying the product obtained in the step (2), roasting to obtain a target catalyst. The method for preparing the dimethyl ether steam reforming hydrogen production catalyst is short in preparation time, low in energy consumption and easily controllable in process parameters; the prepared catalyst is high in reaction activity and good in selectivity; the prepared product is high in purity and good in quality; the catalyst can be used for in situ preparation of hydrogen.

Description

Technical field [0001] The present invention relates to the fields of energy and chemical industry, in particular to a method for rapidly preparing a hydrogen production catalyst for steam reforming of dimethyl ether by alternating microwave. technical background [0002] Hydrogen is an efficient secondary energy source. Although it has a high mass specific energy, its volume specific energy is too low. It is not convenient to carry and add hydrogen directly as a fuel, and it is also difficult to use high-pressure containers or hydrogen storage materials to store hydrogen. There are many security and technical issues to be overcome. Dimethyl ether is a new type of alternative energy. It has the characteristics of high energy density, almost non-toxic, non-corrosive, and non-carcinogenic, and its physical properties are similar to those of liquefied petroleum gas, and it is easy to store and transport. Therefore, the selection and use of dimethyl ether reforming hydrogen producti...

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Problems solved by technology

[0004] US5837217 mixes commercial catalyst Cu-Zn-Al and molecular sieve catalyst to prepare dimethyl ether steam reforming catalyst. Although the preparation method is simple, the catalyst activity is low

CN101822993A combines loaded phosphotungstic acid catalyst with Cu / ZnO / Al 2 o 3 Commercial methanol steam reforming catalysts are mixed to produce solid bifunctional catalysts with high selectivity but low DME conversion

At present, there is no report on related technologies and patent documents on the method of using alternating microwaves to prepare hydrogen production catalysts for steam reforming of dimethyl ether in China.