Method for cogenerating activated carbon and hydrogen by coal char gasification and methane reforming coupling technology

Abstract

The invention discloses a method for cogenerating activated carbon and hydrogen by a coal char gasification and methane reforming coupling technology. The method comprises the following steps: crushing coal char and mixing the coal char with a modifier evenly at the mass ratio of 1 to (0.1-10) to form a mixture; utilizing the mixture as a catalyst for steam reforming reaction of methane, wherein the conditions of regulating and controlling the steam reforming reaction of the methane are as follows: the temperature range is 500-950 DEG C; the pressure is 0-4MPa; and the molar ratio of the methane to steam is 1 to (1-6); collecting the gas generated by steam reforming reaction of the methane to obtain a hydrogen-rich gas; and controlling the standing time in the process of the steam reforming reaction of the methane to be 1-6 hours and then cooling the residues below 100 DEG C to obtain the activated carbon. According to the method, the targets of strengthening the gasification reactivity of the coal char and achieving targeted improvement of hydrogen yield and cogeneration of an activated carbon product can be achieved; and the method has the characteristics of being relatively wide in raw material application range, mild in technological conditions, high in hydrogen purity, low in equipment investment cost, convenient to operate, large-scale in production and the like.

Description

technical field [0001] The invention belongs to the field of conversion and utilization of coal and natural gas, and in particular relates to a method for co-producing activated carbon and hydrogen through a coupling process of coal coke gasification and methane reforming. Background technique [0002] Coal pyrolysis is a potential way of high-quality and efficient transformation of coal, which can produce tar, gas and semi-coke. It has become an important industry to be upgraded or planned to be implemented in northern Shaanxi, Inner Mongolia, Xinjiang and other regions in my country. As of 2014, only the coal pyrolysis semi-coke (referred to as coal coke, locally called "semi-coke") in the Yulin area of ​​northern Shaanxi has built a production capacity of 49.46 million tons, and the output has reached 26.3 million tons. However, with the overall downturn of the global economy, the coal coke industry is facing the problem of overcapacity and the urgent need for high-value ...

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Problems solved by technology

[0008] Up to now, there have been no technical reports on "combining the high-value utilization of coal coke with the methane conversion hydrogen production process for the co-production of activated carbon and hydrogen"