N2气氛下温度和压力对煤热解的影响

doi:10.16085/j.issn.1000-6613.2019-0898

化工进展 ›› 2019, Vol. 38 ›› Issue (s1): 116-121.DOI: 10.16085/j.issn.1000-6613.2019-0898

N₂气氛下温度和压力对煤热解的影响

吴洁¹, 狄佐星¹, 罗明生¹, 王亚涛^2,3, 丁肖肖^2,3, 李洪娟^2,3

1 北京石油化工学院, 燃料清洁化及高效催化减排技术北京市重点实验室, 北京 102617;
2 开滦煤化工研发中心, 河北唐山 063611;
3 河北省煤基材料与化学品工程技术研究中心, 河北唐山 063018

收稿日期:2019-06-04 修回日期:2019-07-23 出版日期:2019-11-16 发布日期:2019-11-16
通讯作者: 罗明生,教授,主要从事煤化工、炼油及环境催化剂研发;李洪娟,工程师,主要从事煤基清洁利用工业催化剂开发。
作者简介:吴洁(1990-),女,硕士研究生。

Study of the effects of temperature and pressure on the coal pyrolysis in the atmosphere of N₂

WU Jie¹, DI Zuoxing¹, LUO Mingsheng¹, WANG Yatao^2,3, DING Xiaoxiao^2,3, LI Hongjuan^2,3

1 Beijing Institute of Petrochemical Technology, Beijing 102617, China;
2 Coal Chemical R&D Center of Kailuan Group, Tangshan 063611, Hebei, China;
3 Hebei Provincial Engineering Technology Research Center of Coal-based Chemicals and Materials, Tangshan 063018, Hebei, China

Received:2019-06-04 Revised:2019-07-23 Online:2019-11-16 Published:2019-11-16

摘要/Abstract

摘要： 研究煤热解的反应特性有助于提高煤热解的转化率和焦油收率并且能够改善焦油的品质。本文在固定床反应器上研究了N₂气氛中，不同压力和温度下的唐山烟煤热解反应，考察了温度和压力对热解失重率、热解气体组成及液相产物产率的影响规律。结果表明当热解压力由1MPa增加至3MPa时，唐山烟煤的失重率和焦油产率均先增加后降低，在2MPa时达到最大值。当温度低于600℃时，压力不影响CH₄、H₂和CO的收率，当温度超过600℃时，CH₄、H₂和CO的收率随热解压力的升高而降低。随着热解温度的升高，煤热解的失重率、水的产率以及CH₄、H₂的收率不断增大，焦油的收率和CO的收率先增大后降低，在2MPa下600℃时焦油的收率达最大值为9.23%。

关键词: 煤, 煤热解, 温度, 压力, 焦油收率

Abstract: The study of the reaction characteristics of coal pyrolysis is helpful to improve the conversion of coal pyrolysis and the yield of tar, as well as the quality of tar. In this paper, the pyrolysis behavior in N₂ atmosphere of coal under different pressure and temperature was investigated in a fixed pyrolysis reactor. Moreover, the effects of temperature and pressure on weight loss rate of pyrolysis, pyrolysis gas composition and liquid product yield were also investigated. The results showed that the weight loss rate and the tar yield of the coal decreased at first and then increased when the pressure increased from 1 MPa to 3 MPa, and the peak was reached at 2 MPa. When the temperature was below 600℃, the pressure made no difference on the yield of CH₄, H₂ and CO. However, the increasing temperature was up to 600℃ or more, the yield of water, CH₄ and H₂, as well as the weight loss rate of coal pyrolysis,were both increased.Meanwhile, The yield of tar and CO increased at first and then decreased, Futhermore, the maximum yield of tar reached 9.23% at 2MPa and 600℃.

Key words: coal, coal pyrolysis, temperature, pressure, tar yield

中图分类号:

TQ530

吴洁, 狄佐星, 罗明生, 王亚涛, 丁肖肖, 李洪娟. N₂气氛下温度和压力对煤热解的影响[J]. 化工进展, 2019, 38(s1): 116-121.

WU Jie, DI Zuoxing, LUO Mingsheng, WANG Yatao, DING Xiaoxiao, LI Hongjuan. Study of the effects of temperature and pressure on the coal pyrolysis in the atmosphere of N₂[J]. Chemical Industry and Engineering Progress, 2019, 38(s1): 116-121.

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N₂气氛下温度和压力对煤热解的影响

Study of the effects of temperature and pressure on the coal pyrolysis in the atmosphere of N₂

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