Experimental study on gasification characteristics of Wulagai lignite semi-coke

FANG Shunli; YAO Wei; LIU Jiali; YAO Bin; YANG Zhongcan; WANG Guifang

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Experimental study on gasification characteristics of Wulagai lignite semi-coke

Thermal Power Generation Vol. 46, Issue 12, Pages: 75-79(2017)

更新时间：2025-09-28

- Experimental study on gasification characteristics of Wulagai lignite semi-coke
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 华中科技大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK16
- Published：2017
- 稿件说明：
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FANG Shunli, YAO Wei, LIU Jiali, et al. Experimental study on gasification characteristics of Wulagai lignite semi-coke[J]. Thermal Power Generation, 2017, 46(12): 75-79.
DOI：

FANG Shunli, YAO Wei, LIU Jiali, et al. Experimental study on gasification characteristics of Wulagai lignite semi-coke[J]. Thermal Power Generation, 2017, 46(12): 75-79. DOI：

摘要

采用不同热解参数制备了4种乌拉盖褐煤半焦样品

并利用气体吸附法对其进行了比表面积及孔径结构的测定

利用热重分析法进行半焦样品的CO2气化反应活性的测定

利用管式炉对半焦样品进行气化并测量了CO体积分数随温度的变化情况。试验结果表明:较快的升温速率、较短的热解时间有助于提高乌拉盖褐煤半焦的孔隙率及孔容积;热解终温为700℃的乌拉盖褐煤半焦比表面积大于热解终温为520℃

但其气化反应活性却相对较低;各半焦样品气化反应速率最高时对应的温度为850℃左右;根据乌拉盖褐煤半焦的孔径结构、气化反应活性、煤质特性以及各气化炉的工艺特点

推荐乌拉盖褐煤热解过程采取低温、快速升温、快速热解的工艺

其气化过程采用气流床气化技术。本研究结果可为乌拉盖褐煤热解工艺优化以及乌拉盖半焦的气化利用提供参考。

Abstract

Four kinds of Wulagai lignite semi-coke samples were prepared by pyrolysis using different pyrolytic parameters.The BET area and pore structure of the samples was characterized through gas adsorption method

the CO_2 gasification activity of the samples was examined by TGA method

and the samples were gasified in a tube furnace and the CO volume concentration variation with temperature was measured.The results show that

faster temperature rising rate and shorter pyrolysis time could help increasing the BET are and hole volume of the Wulagai semi-coke samples.The sample with final pyrolysis temperature of 700 ℃ had larger BET area than that with final pyrolysis temperature of 520 ℃

but its gasification reactivity was lower relatively.The temperature was about 850 ℃ when the four samples' gasification rate reached the maximum.Considering the pore structure

gasification activity

fuel property and gasifiers characteristics of the Wulagai lignite semi-coke

it is recommended that the pyrolysis of Wulagai lignite should be carried out at low temperature

with rapid heating rate and rapid pyrolysis process

and the gasification should be controlled by entrained-flow gasification technologies.This results can provide reference for optimizing the pyrolysis process and gasification utilization of Wulagai lignite semi-coke.

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