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Steam gasification method for anthracite

A technology of anthracite and water vapor, applied in the field of coal gasification, can solve the problems of restricting the application of anthracite, high ignition point, and low volatile matter

Inactive Publication Date: 2020-10-30
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As the coal with the largest degree of coalification, anthracite has high fixed carbon content, low volatile matter, compact structure, and high ignition point. Therefore, it has poor reactivity when gasified with water vapor, and the gasification reaction needs to be performed at a higher temperature. progress, thus restricting the application of anthracite in the field of coal gasification technology

Method used

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  • Steam gasification method for anthracite
  • Steam gasification method for anthracite
  • Steam gasification method for anthracite

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Embodiment 1

[0085] According to the ratio of 1g:10mL, the anthracite is placed in a hydrochloric acid solution with a mass concentration of 17% for pickling, at 200r·min -1 Pickling under the rotating speed of 12h, according to the ratio of 1g:10mL again, the anthracite after the hydrochloric acid solution pickling is placed in the hydrofluoric acid solution that mass concentration is 40%, at 200r·min -1 Pickling at a speed of 12 hours, then put the anthracite pickled with hydrofluoric acid solution in a Buchner funnel for suction filtration until the pH of the filtrate is neutral, and finally put the filter cake under a nitrogen atmosphere at 105°C Dry for 12 hours to obtain demineralized anthracite;

[0086] Crush the demineralized anthracite to a particle size of 200 mesh, weigh 10 g and place it in a beaker, add 180 mL of concentrated sulfuric acid with a mass concentration of 98%, and -1 Stir for 3 hours under the speed of rotation to obtain a black turbid liquid; at -4°C, slowly ad...

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Abstract

The invention provides a steam gasification method for anthracite. The steam gasification method comprises the following steps: carrying out acid pickling demineralization and reoxidation treatment onanthracite, mixing the treated anthracite with a calcium source, and carrying out a gasification reaction on an obtained calcium-added coal sample and steam. According to the method, a large number of carboxyl functional groups are added into the demineralized anthracite through oxidation, and the graphitization degree of the anthracite is reduced ; and through combined use of Ca<2+> in the calcium source, gasification performance is improved and a reaction temperature zone is advanced. Results of embodiments show that according to the steam gasification method for anthracite provided by theinvention, the initial temperature of steam gasification is 560 DEG C, and the generation rate of synthesis gas reaches the maximum at 710 DEG C; the maximum generation rate of H2 is 1.480 mmol.min<-1>.G<-1>; the maximum generation rate of CO2 is 0.493 mmol.min<-1>.G<-1>; and a carbon conversion rate tends to be gentle at a temperature below 750 DEG C and reaches the highest at 850 DEG C.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a method for steam gasification of anthracite coal. Background technique [0002] In the world's energy reserves, coal accounts for about 79%. The research and development of coal utilization technology is one of the important contents of energy strategy. Among them, coal gasification is a method that uses coal or coal char as raw material, uses oxygen, water vapor or hydrogen as gasification agent, and converts the combustible part of coal or coal char into gas fuel or downstream through chemical reaction under high temperature conditions. The process of raw materials, in addition to improving the utilization efficiency of coal, can also reduce the emission of nitrogen oxides and sulfur compounds during the gasification process, and realize the clean and efficient utilization of coal. [0003] As the coal with the largest degree of coalification, anthracite has high f...

Claims

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Application Information

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IPC IPC(8): C10J3/00C10J3/72
CPCC10J3/00C10J3/72C10J2300/093C10J2300/0976
Inventor 李娜刘鲁峰刘全生史肃龙
Owner INNER MONGOLIA UNIV OF TECH
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