Cellular integral sulfur-tolerant methanation catalyst and preparation method thereof

Abstract

The invention provides a cellular integral sulfur-tolerant methanation catalyst. The cellular integral sulfur-tolerant methanation catalyst comprises 1, a cellular integral carrier which is prepared from a porous ceramic material and has multiple channels passing through the cellular integral carrier, and 2 active components which comprise a molybdenum oxide as a main active component, a cobalt oxide as a first assistant, and at least one of a zirconium oxide, a cerium oxide and a lanthanum oxide as a second assistant. The invention also discloses a preparation method of the cellular integral sulfur-tolerant methanation catalyst.

Description

field of invention [0001] The invention relates to the field of methanation catalysts and to a preparation method of the catalysts. Specifically, the present invention relates to a honeycomb monolithic sulfur-tolerant methanation catalyst and a preparation method thereof. Background technique [0002] Coal catalytic gasification is a highly energy-efficient and environmentally friendly coal gasification process. The synthesis gas produced by catalytic gasification of coal steam generally contains H 2 , CO, CO 2 , CH 4 , H 2 S and unreacted H 2 O, where H 2 and CO to be further methanated to CH 4 . The methanation and coal catalytic gasification are integrated into the same reactor, and the synthesis gas is directly passed into the methanation catalyst bed without cooling down, thus avoiding the energy loss caused by the gas cooling first and then heating up. The feed gas produced by catalytic coal gasification contains H 2 S and other organic sulfur, and H in gas 2...

AI Technical Summary

Problems solved by technology

In addition, the raw material gas has not been purified by traditional processes (deashing, detarring), and the dust and tar contained in it will cause the following problems: (1) Dust will block the pores of the catalyst, resulting in excessive pressure drop, resulting in synthesis The gas cannot pass through the catalyst bed; (2) The catalyst is pulverized due to continuous wear and tear during use, resulting in the loss of the catalyst; (3) Fly ash may adhere to the surface of the catalyst, hindering the contact between the catalyst and the raw material gas and making it impossible to react

However, the pellet-shaped or flake-shaped catalyst bed is easily clogged by dust, causing too much pressure drop in the bed layer, so it is not suitable for the synthesis gas reaction containing dust