Catalyst with methane catalytic combustion and conversion functions and preparation method thereof

Abstract

The invention discloses a catalyst with functions of methane catalytic combustion and conversion, and a preparation method thereof. The catalyst is an integer honeycomb catalyst, comprising one or a plurality of active components selected from manganese, nickel and cobalt, and one or a plurality of auxiliary agents selected from MgO, La2O3, CeO2 and BaO, wherein the active components are in a form of oxide and account for 5%-20%, and the auxiliary agents account for 1-10%, and the balance is carrier. The catalyst has double functions of methane catalytic combustion and methane steam conversion and can be used in reactions of gas preparation for power generation from low-quality coalbed methane. After reaction, residual oxygen in the gas is little, and a decrease of a feed gas gross calorific value is low; besides the catalyst has high strength, good thermal stability and good low-temperature light-off temperature.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of low-quality coal-bed methane, and particularly relates to a catalyst suitable for removing oxygen in low-quality coal-bed methane and methane steam reforming reaction and a preparation method thereof. Background technique [0002] Coal bed gas is called coal mine gas in coal mines. According to the new resource evaluation results, my country's onshore coalbed methane resources are 36.8 trillion cubic meters, which is equivalent to the onshore conventional natural gas resources (38 trillion cubic meters), but most of the coalbed methane has not been effectively utilized. The emission of a large amount of low-quality coalbed methane not only wastes precious clean energy resources, but also aggravates the impact of the global greenhouse effect. From the point of view of energy saving and environmental protection, it is necessary to separate, purify and recycle them. Separation ...

AI Technical Summary

Problems solved by technology

Among them, only the catalytic combustion method is used for catalyst deoxidation, the heat release of the strong oxidation reaction is relatively large, and the temperature rise of the existing catalyst bed is relatively high, so the equipment investment is relatively large, the process is relatively complicated, and the total combustion heat of the raw material gas is relatively low; The coke deoxidation method consumes valuable coke resources, and the operating cost of the whole system is relatively high. In addition, coking and slag removal are labor-intensive, the environment is dusty, and there will be various forms of sulfide

In view of the respective shortcomings of the above two methods, developing a deoxidation and conversion dual-function catalyst that can use a higher inlet oxygen content and generate thermal energy can be reasonably utilized is a problem that those skilled in the art have been eager to solve but have not been able to solve. technical challenge

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