Nickel-based biomass tar steam reforming catalyst and its preparation and application method

Abstract

The invention belongs to the technical field of the energy and chemical industry and particularly relates to a nickel-based steam reforming catalyst for biomass tar and a preparation and application method of the catalyst. The catalyst adopts low-cost brown coal as a carrier and comprises the following components by weight percent: 23-25% of Ni, 64.26-66.26% of C, 6.06% of O and 6% of impurity elements. The catalyst is prepared by adopting the cooperation of an ion exchange method and an impregnation method. The catalyst has the good activity and economy, the brown coal is low in cost and large in specific surface area, after being washed by sodium hydroxide, micropores of the brown coal become mesopores and macropores, so that macromolecular compounds of the tar are relatively easy to pass; simultaneously, a relatively large quantity of new through holes are also formed in the brown coal; in the process of catalytic reformation of the tar, a relatively large quantity of effective pore channels are formed, so that the efficiency for reforming the biomass tar is relatively high; the carbon deposited amount of the catalyst and the carbon consumption amount of catalyst carrier carbon can form dynamic balance, so that the service life of the catalyst is prolonged and the catalyst is not easily inactivated.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical engineering, and in particular relates to a nickel-based biomass tar steam reforming catalyst and a preparation and application method thereof. Background technique [0002] With the depletion of fossil energy and the deterioration of the global environment, biomass, as a renewable energy that can replace fossil energy in solid, liquid and gas, has attracted more and more attention. Among them, biomass gasification technology can produce high-grade energy such as hydrogen and carbon monoxide because of its relatively simple technical route, and related research has been carried out earlier and more fully. However, there has always been a bottleneck in the gasification process, which is the inevitable generation of tar during the gasification process. Tar condensation and accumulation at low temperature lead to equipment corrosion, blockage and energy loss. How to efficiently remove ta...

AI Technical Summary

Problems solved by technology

One of them is a preparation method of an integral biomass gasification tar cracking catalyst (200610122580.7) and a biomass gasification tar cracking catalyst and its preparation method (200910272415.3). Although they discuss how to prepare a highly efficient nickel-based Catalyst, but there is still a lack of sufficient understanding of the real active components of the catalyst itself and the catalytic cracking mechanism of tar, and the cost of catalyst raw materials is relatively high (the price of analytical pure aluminum oxide is 100 yuan / kg), and it is difficult to achieve commercial operation

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