Method and device for preparing methane through catalytic hydrogenation of coal
A technology for producing methane and catalytic hydrogenation, applied in the field of coal gasification, can solve the problems of secondary environmental pollution and low added value of products, and achieve the effects of reducing process cost, realizing environmental protection and recycling, and improving economy and environmental protection.
Active Publication Date: 2019-01-11
ENN SCI & TECH DEV
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Problems solved by technology
At present, steel slag is mainly used as the filling material of mine pits, instead of gravel paving, and the production of water quality purifiers, etc., but these treatment methods cause secondary pollution to the environment, and the added value of the product is low
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[0022] The method for producing methane by catalytic coal hydrogenation and the device for producing methane by catalytic coal hydrogenation according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0023] In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention.
[0024] The terms "first" and "second...
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Abstract
The invention discloses a method and a device for preparing methane through catalytic hydrogenation of coal, and relates to the technical field of coal gasification. The method and the device are invented for preparing methane. The method for preparing methane through catalytic hydrogenation of coal comprises the following steps: 1, gasifying coal: mixing steel slag, coal and water vapor to gasifythe coal in order to obtain syngas and iron, wherein the steel slag comprises iron oxide; 2, preparing methane: mixing t pulverized coal, the obtained syngas and iron, and carrying out catalytic hydrogenation gasification to obtain methane and iron-containing semi-coke; and 3, oxidizing iron: carrying out gas-solid separation on the obtained methane and the iron-containing semi-coke, oxidizing the separated iron-containing semi-coke to produce iron oxide, and introducing the iron oxide into coal gasification. The method and the device for preparing methane through catalytic hydrogenation of coal use the steel slag as a catalyst for preparing methane adopt a two-stage gasification process, so the generation rate of methane is improved, and the environmentally-friendly recycling of the steel slag is achieved.
Description
technical field [0001] The invention relates to the technical field of coal gasification, in particular to a method for producing methane by catalytic hydrogenation of coal and a device for producing methane by catalytic hydrogenation of coal. Background technique [0002] Catalytic hydrogenation of coal to produce methane usually uses Group VIII metals or alkali metals such as Fe, Co, and Ni as catalysts. Group VIII metals exist in the ash in the form of simple metals after catalytic hydrogenation reaction, and acid washing is required to realize the catalyst. Recycle. The pickling process not only increases the cost, but also causes environmental pollution, and the cost of some catalysts is relatively high. Therefore, the selection and recovery of catalysts restrict the development of the entire coal catalytic hydrogenation process. [0003] Steel slag is the waste slag produced in the steelmaking process, and its output is about 15% to 20% of the steel output. Steel sla...
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IPC IPC(8): C10J3/72
CPCC10J3/721C10J2300/093C10J2300/0976C10J2300/0986C10J2300/1662C10J2300/1807
Inventor 王会芳李鹏刘雷李克忠
Owner ENN SCI & TECH DEV