Oxygen-containing coal bed gas deoxidation catalyst and preparation thereof as well as applications

Abstract

The invention discloses a deoxidizing catalyst for a coal-seam gas containing oxygen and a preparation method as well as an application thereof. The deoxidizing catalyst of the invention consists of an active component, an active auxiliary and a porous carrier. The active component is the compound of Co; the active auxiliary is one or more compounds of Mn, Fe, Zn and Cu; the porous carrier is oneor more of aluminum oxide, titanium oxide, zirconium oxide, magnesium oxide, calcium oxide, silicon oxide, a phosphor-aluminium molecular sieve, an A-typed molecular sieve, an X-typed molecular sieve, a Y-typed molecular sieve, a mordenite, a ZSM-5 zeolite, diatomaceous earth, kaolinite, natural clay, aluminum silicate and magnesium silicate; calculated by oxide, the weight percentage of the active component is 1 to 60 percent; the weight percentage of the active auxiliary is 1 to 50 percent; the rest is the carrier. The catalyst of the invention has certain sulfur-resistance performance, is applicable to the deoxidization treatment of coal-seam gas with an oxygen content of 3 to 6 percent (V / V) and is capable of causing the oxygen content in the coal-seam gas to be lower than 0.5 percentby deoxidization.

Description

technical field [0001] The invention relates to a catalyst, in particular to an oxygen-containing coal bed gas deoxidation catalyst and its preparation method and its application in the oxygen-containing coal bed gas deoxidation. Background technique [0002] Coalbed methane exists in large quantities in coal seams, and is an unconventional natural gas; it is one of the main causes of underground accidents in coal mines. In fact, coalbed methane is a new energy with high calorific value and no pollution. It can be used as fuel for power generation, process fuel, chemical raw material and residential fuel. my country emits about 30 billion cubic meters of coal-bed methane into the atmosphere every year, causing huge environmental pressure and waste of resources. Reasonable and comprehensive utilization of coalbed methane can make up for my country's energy shortage. At the same time, the recovery and utilization of coalbed methane can also help to protect the environment. T...

AI Technical Summary

Problems solved by technology

The disadvantage is that the catalyst is expensive, and coalbed methane contains sulfide, and sulfur has a poisonous effect on precious metals, which will cause catalyst deactivation. Therefore, desulfurization must be carried out before deoxidation, and then deoxidation reaction, which increases the cost of deoxidation. Resulting in higher cost of catalytic deoxidation treatment of coalbed methane

But the disadvantage is that this method consumes precious coke resources, and the consumption cost of coke is about 50% of the entire operating cost.

In addition, the coke deoxidation method is labor-intensive in adding coke and slag, and the environment is dusty, and there are various forms of sulfide in the coke.