Reduction and passivation method of copper-based catalyst for hydrogen production from methanol reforming

Abstract

The invention discloses a reduction method of a copper-based catalyst for hydrogen production from methanol reforming. The reduction method comprises the following steps: firstly, taking heat-conduction oil as a heating source, taking air with a heating space velocity of 100-500 h<-1> as a heat carrier, heating a catalyst bed layer in a converter to 160 DEG C, then heating the catalyst bed layer in the converter to 230 DEG C by using water vapor, and reducing the catalyst by using a methanol water mixed solution with a methanol mass concentration of 2-3%. The reduction method is used to solvethe technical problem that a conventional method is complex in process, large in investment cost, and long in heating time. The invention further discloses a passivation method of the copper-based catalyst for hydrogen production from methanol reforming. The passivation method comprises the following steps: the temperature in the converter is kept at 150-160 DEG C by using saturated water vapor under a normal pressure condition; a proper amount of an air passivation catalyst is added into gas in the convertor under a condition that the temperature in the converter is maintained to be not higher than 160 DEG C; and after the gas is completely converted to air, the temperature is reduced to room temperature, so that the passivation of the catalyst is realized. The passivation method is usedto solve a technical problem that a conventional N2-air passivation method is difficult to control and time consumption is large.

Description

technical field [0001] The invention relates to the technical field of preparing hydrogen by using methanol as a raw material, in particular to a reduction and passivation method of a copper-based catalyst for hydrogen production by methanol reforming. Background technique [0002] In the past ten years, due to the high one-time investment cost of natural gas hydrogen production equipment and the serious shortage of natural gas raw material supply in my country, methanol reforming hydrogen production has developed rapidly. The methanol reforming hydrogen production plant has developed from the initial hydrogen production capacity of tens of cubic meters per hour to a large-scale industrial plant that can produce 60,000 cubic meters per hour, providing great convenience for the use of hydrogen in industrial oil refining, pharmaceutical synthesis and other fields. . [0003] At present, the catalysts of industrial re-methanol reforming hydrogen production units are all copper...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for reducing copper-based catalysts for methanol reforming hydrogen production, without using H2 and N2, and directly bypassing the catalyst reduction induction period that traditional reduction methods must go through, so as to solve the complex process and investment cost of traditional methods Large technical problems and long heating time; at the same time, a passivation method for copper-based catalysts for methanol reforming hydrogen production is provided, which solves the difficulty of temperature control, long time-consuming and space velocity of passivation gas in traditional N2-air passivation methods Technical questions with special requirements

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