Effect of particle size on gasification of char with different coal ranks

ZOU Xiao-peng; SHENG Yu-jing; LU Hai-feng; GUO Xiao-lei; GUO Qing-hua; GONG Xin

Volume 45 Issue 4

Apr. 2017

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2017 > 45(4): 408-417

ZOU Xiao-peng, SHENG Yu-jing, LU Hai-feng, GUO Xiao-lei, GUO Qing-hua, GONG Xin. Effect of particle size on gasification of char with different coal ranks[J]. Journal of Fuel Chemistry and Technology, 2017, 45(4): 408-417.

Citation:

ZOU Xiao-peng, SHENG Yu-jing, LU Hai-feng, GUO Xiao-lei, GUO Qing-hua, GONG Xin. Effect of particle size on gasification of char with different coal ranks[J]. Journal of Fuel Chemistry and Technology, 2017, 45(4): 408-417.

Citation:

PDF( 837 KB)

Effect of particle size on gasification of char with different coal ranks

ZOU Xiao-peng^{1, 2},
SHENG Yu-jing^{1, 2},
LU Hai-feng^{1, 2},
GUO Xiao-lei^{1, 2},
GUO Qing-hua^{1, 2},
GONG Xin^{1, 2
,
,}

1.
Shanghai Engineering Research Center of Coal Gasification, Shanghai 200237, China
2.
Collaborative Innovation Center of Chemical Technology for Coal Based Energy, Shanghai 200237, China

Funds:

Sinopec Scientific and Technological Development Projects 415022

the Fundamental Research Funds for the Central Universities 222201414030

Received Date: 2016-12-07
Rev Recd Date: 2017-02-13

Available Online: 2021-01-23

Publish Date: 2017-04-10

Abstract

Abstract

Eight coal chars of different coal ranks were prepared to investigate the effects of coal rank, reaction temperature and particle size on char-CO₂ gasification using a thermogravimetric analyzer (TGA). The variation of char-CO₂ gasification rate with carbon conversion was studied, especially at high conversion stage. As a result, the crystalline structures of higher rank chars are more orderly, resulting in a lower gasification rate. For high rank coals like anthracite, the CO₂ gasification rate of char with 40 μm size is about 7 times higher than that with 300 μm size to reach 95% conversion at 1 300℃. For low rank coals, particle size has little effect on the gasification rate. The results indicate that the effect of particle size on char-CO₂ gasification is dependent on coal rank. The specific surface area of high rank coals is much smaller than that of low rank coals, which contributes to the significant effect of particle size on high rank coal gasification. The effect of gasification temperature and particle size on gasification rate for high rank coals is more significant than that for low rank coals.
- coal rank,
- gasification temperature,
- particle size,
- CO₂ gasification

FullText(HTML)

References(21)

References

[1]	FUNG D P C, KIM S D. Laboratory gasification study of Canadian coals:2. Chemical reactivity and coal rank[J]. Fuel, 1983, 62(11):1337-1340. doi: 10.1016/S0016-2361(83)80020-9
[2]	MIURA K, HASHIMOTO K, SILVESTON P L. Factors affecting the reactivity of coal chars during gasification, and indices representing reactivity[J]. Fuel, 1989, 68(11):1461-1475. doi: 10.1016/0016-2361(89)90046-X
[3]	ZHANG L X, HUANG J J, FANG Y T, WANG Y. Gasification reactivity and kinetics of typical Chinese anthracite chars with steam and CO₂[J]. Energy Fuels, 2006, 20(3):1201-1210. doi: 10.1021/ef050343o
[4]	向银花, 王洋, 张建民, 张守玉, 房倚天, 董众兵.部分气化焦的水蒸气气化动力学[J].化工学报, 2003, 54(3):368-373. http://www.cnki.com.cn/Article/CJFDTOTAL-HGSZ200303017.htm XIANG Yin-hua, WANG Yang, ZHANG Jian-min, ZHANG Shou-yu, FANG Yi-tian, DONG Zhong-bing. Kinetic on steam gasification of partially gasified char[J]. J Chem Ind Eng (China), 2003, 54(3):368-373. http://www.cnki.com.cn/Article/CJFDTOTAL-HGSZ200303017.htm
[5]	LIU H, LUO C, KATO S, UEMIYA S, KANEKO M, KOJIMA T. Kinetics of CO₂/Char gasification at elevated temperatures:Part I:Experimental results[J]. Fuel Process Technol, 2006, 87:775-781. doi: 10.1016/j.fuproc.2006.02.006
[6]	KOVACIK G, CHAMBERS A, ÖZÜM B. CO₂ gasification kinetics of two Alberta coal chars[J]. Can J Chem Eng, 1991, 69(3):811-815. doi: 10.1002/cjce.v69:3
[7]	林善俊, 周志杰, 霍威, 丁路, 于广锁.内扩散对煤和石油焦水蒸气气化反应性能的影响[J].燃料化学学报, 2014, 42(8):905-912. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18464.shtml LIN Shan-jun, ZHOU Zhi-jie, HUO Wei, DING Lu, YU Guang-suo. Effect of internal diffusion on steam gasification reactivity of coal and petroleum coke[J]. J Fuel Chem Technol, 2014, 42(8):905-912. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18464.shtml
[8]	HUO W, ZHOU Z J, WANG F C, WANG Y F, YU G S. Experimental study of pore diffusion effect on char gasification with CO₂ and steam[J]. Fuel, 2014, 131:59-65. doi: 10.1016/j.fuel.2014.04.058
[9]	MATSUI I, KUNII D, FURUSAWA T. Study of char gasification by carbon dioxide 1. Kinetic study by thermogravimetric analysis[J]. Ind Eng Chem Res, 1987, 26(1):91-95. doi: 10.1021/ie00061a017
[10]	YONG T K, DONG K S, JUNGHO H. Study of the effect of coal type and particle size on Char-CO₂ gasification via gas analysis[J]. Energy Fuels, 2011, 25:5044-5054. doi: 10.1021/ef200745x
[11]	TAKARADA T, TAMAI Y, TOMITA A. Reactivities of 34 coals under steam gasification[J]. Fuel, 1985, 64(10):1438-1442. doi: 10.1016/0016-2361(85)90347-3
[12]	陆厚根.粉体工程导论[M].上海:同济大学出版社, 1993. LU Hou-gen. Introduction to Powder Technology[M]. Shanghai:Tongji University Press, 1993.
[13]	王芳, 曾玺, 王永刚, 余剑, 岳君容, 张建岭, 许光文.微型流化床与热重测定煤焦非等温气化反应动力学对比[J].化工学报, 2015, 66(5):1716-1722. http://www.cnki.com.cn/Article/CJFDTOTAL-HGSZ201505013.htm WANG Fang, ZENG Xi, WANG Yong-gang, YU Jian, YUE Jun-rong, ZHANG Jian-ling, XU Guang-wen. Comparation of non-isothermal coal char gasification in micro fluidized bed and hermogravimetric analyzer[J]. J Chem Ind Eng (China), 2015, 66(5):1716-1722. http://www.cnki.com.cn/Article/CJFDTOTAL-HGSZ201505013.htm
[14]	FENG B, BHATIA S K, BARRY J C. Variation of the crystalline structure of coal char during gasification[J]. Energy Fuels, 2003, 17(3):744-754. doi: 10.1021/ef0202541
[15]	DING L U, ZHOU Z J, GUO Q H, WANG Y F, YU G S. In situ analysis and mechanism study of char-ash/slag transition in pulverized coal gasification[J]. Energy Fuels, 2015, 29(6):3532-3544. doi: 10.1021/acs.energyfuels.5b00322
[16]	潘宗林, 李寒旭, 张颂, 赵瑞, 刘铭, 钱宁波.淮南煤Fe₂O₃催化气化及硅铝对催化的影响[J].煤炭技术, 2015, 34(3):301-303. http://www.cnki.com.cn/Article/CJFDTotal-MTJS201503114.htm PAN Zong-lin, LI Han-xu, ZHANG Song, ZHANG Rui, LIU Ming, QIAN Ning-bo. Catalytic gasification of Huainan coal by using Fe₂O₃ as catalysts and effect of SiO₂ and Al₂O₃ on catalytic gasification[J]. Coal Technol, 2015, 34(3):301-303. http://www.cnki.com.cn/Article/CJFDTotal-MTJS201503114.htm
[17]	ÖZTAS N A, YÜRÜM Y. Pyrolysis of turkish zonguldak bituminous coal. Part 1. Effect of mineral matter[J]. Fuel, 2000, 79(10):1221-1227. doi: 10.1016/S0016-2361(99)00255-0
[18]	陈路, 周志杰, 刘鑫, 袁帅, 王辅臣.煤快速热解焦的微观结构对其气化活性的影响[J].燃料化学学报, 2012, 40(6):648-654. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract17958.shtml CHEN Lu, ZHOU Zhi-jie, LIU Xin, YUAN Shuai, WANG Fu-chen. Effect of microstructure of rapid pyrolysis char on its gasification reactivity[J]. J Fuel Chem Technol, 2012, 40(6):648-654. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract17958.shtml
[19]	HUO W, ZHOU Z J, CHEN X L, DAI Z H, YU G S. Study on CO₂ gasification reactivity and physical characteristics of biomass, petroleum coke and coal chars[J]. Bioresour Technol, 2014, 159:143-149. doi: 10.1016/j.biortech.2014.02.117
[20]	YE D P, AGNEW J B, ZHANG D K. Gasification of a South Australian low-rank coal with carbon dioxide and steam:Kinetics and reactivity studies[J]. Fuel, 1998, 77(11):1209-1219. doi: 10.1016/S0016-2361(98)00014-3
[21]	申峻, 王志忠.不同煤阶煤炭化过程中挥发分组成及微孔变化的研究[J].煤炭学报, 2007, 32(6):626-629. http://www.cnki.com.cn/Article/CJFDTOTAL-MTXB200706016.htm SHEN Jun, WANG Zhi-zhong. Study on variation of micro-pores ( < 100 nm) and volatile components of different rank coals during carbonization[J]. J China Coal Soc, 2007, 32(6):626-629. http://www.cnki.com.cn/Article/CJFDTOTAL-MTXB200706016.htm