Production technology of catalyst for producing hydrogen by reforming methanol vapour at high temperature and application of catalyst

Abstract

The invention discloses a production technology of a catalyst for producing hydrogen by reforming methanol vapour at a high temperature, and the application of the catalyst. According to the production technology disclosed by the invention, pseudo-boehmite, titanium dioxide, citric acid and graphite are used as raw materials for producing a catalyst carrier, besides, the carrier is pressed into a Raschig ring shape, and the catalyst can be suitable for a hydrogen production reaction by reforming the methanol vapour at the high temperature under the reaction condition of 300-600 DEG C; The production technology and the application of the catalyst disclosed by the invention have the beneficial effects that the catalyst does not use a noble metal catalyst, and besides, a conventional coprecipitation method is not selected for use, so that the cost and resources are greatly reduced, and the catalyst has an actual application value; the catalyst produced by the production technology disclosed by the invention uses the Raschig ring shape, so that the specific surface of the catalyst is larger, and the mass transfer effect and the heat transfer effect are better. The catalyst is simple to apply, and can be used when a reactor is directly heated to use temperature and raw gas can be used; in the process of heating, no physical water is drained, and the volume contraction of the catalyst is small.

Description

Technical field [0001] The invention involves the production process and application of hydrogen catalysts in the field of chemical industry, which specializes in a methanol water steam high -temperature reorganization hydrogen catalyst. Background technique [0002] Methanol has the advantages of low cost, high energy density, low carbon content, and convenient transportation and storage.There are three types of oxidation and reorganization. Among them, methanol water steam reorganization hydrogen is the highest response to the hydrogen content in the conversion gas. It has the advantages of low cost, mild condition, and small product composition. [0003] The core of methanol water steam reorganization hydrogen control is catalysts. The relevant catalysts have been widely and in -depth research. Most of the copper -based catalysts have been studied.The high -temperature environment required for mobile hydrogen equipment and fuel cells 300 ~ 550 ° C.In recent years, catalysts ar...

AI Technical Summary

Problems solved by technology

[0003] The core of hydrogen production technology by steam reforming of methanol lies in the catalyst. The related catalysts have been extensively and in-depth researched, and most of them are copper-based catalysts. However, copper-based catalysts are mainly suitable for low-temperature environments of 210-300°C, and are not suitable for small High temperature environment of 300~550℃ required for mobile hydrogen production equipment and fuel cell use

In recent years, catalysts suitable for hydrogen production in high-temperature environments have mainly focused on Zn-Cr catalysts and noble metal catalysts. Although noble metal catalysts have attracted much attention due to their high activity and stability, their high prices are still difficult to adapt to the current hydrogen production market. need

Non-precious metal Zn-Cr catalysts mentioned in the Journal of Catalysis 10 (2006) by Cao Weiqiang, Chen Guangwen, etc., and non-noble metal catalysts mentioned in patent 00110041.6 with ZnO as the active component and part of Group VIII metals as active promoters , the preparation method is the co-precipitation preparation technology, this preparation method generally uses sodium carbonate as the co-precipitation agent, and the pH value is relatively high during the co-precipitation process, and a large amount of water is required to wash the precipitated filter cake ; This wastes water resources and causes a large amount of waste water to be treated, which is neither economical nor environmentally friendly. More importantly, there are still some sodium ions in the catalyst that are difficult to clean thoroughly, which affects the service life of the catalyst.