Sulfur-tolerance deoxidation catalyst and preparation and use thereof

Abstract

The invention discloses a sulfur-tolerant deoxidizing catalyst, preparation method and application thereof. The catalyst of the invention is composed of active components and porous carriers, the active components are one or more of compound of iron and / or copper, the porous carriers are selected from one or more of aluminium oxide, titanium oxide, zirconium oxide, zinc oxide, magnesium oxide, calcium oxide, silicon dioxide, aluminophosphate molecular sieves, A type molecular sieves, X type molecular sieves, Y type molecular sieves, mordenite, ZSM-5 zeolite, kieselguhr, kaoline, natural clay, aluminum silicate and magnesium silicate. Based on the oxide content, the active components loading amount is 1-95% by weight, the rest are porous carriers. The catalyst of the invention has definite sulfur-tolerant performance, is suitable for deoxidation treatment of coal seam gas with oxygen content of 3-6% (V / V), and can deoxidize the coal seam gas to make the oxygen content less than 0.5%.

Description

technical field [0001] The invention relates to a catalyst, in particular to a sulfur-resistant deoxidation catalyst, its preparation method and its application in 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. The greenhouse effect o...

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.