Upgrading of Zhaotong coal by pyrolysis and its effect on the gasification reactivity

ZHAO Hui-ming; JIA Ting-hao; WANG Mei-jun; BAO Wei-ren; CHANG Li-ping

Volume 44 Issue 8

Aug. 2016

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2016 > 44(8): 904-910

ZHAO Hui-ming, JIA Ting-hao, WANG Mei-jun, BAO Wei-ren, CHANG Li-ping. Upgrading of Zhaotong coal by pyrolysis and its effect on the gasification reactivity[J]. Journal of Fuel Chemistry and Technology, 2016, 44(8): 904-910.

Citation:

ZHAO Hui-ming, JIA Ting-hao, WANG Mei-jun, BAO Wei-ren, CHANG Li-ping. Upgrading of Zhaotong coal by pyrolysis and its effect on the gasification reactivity[J]. Journal of Fuel Chemistry and Technology, 2016, 44(8): 904-910.

Citation:

PDF( 881 KB)

Upgrading of Zhaotong coal by pyrolysis and its effect on the gasification reactivity

Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education and Shanxi Province, Taiyuan 030024, China

More Information

Corresponding author: Tel: 0351-6010482 E-mail: lpchang@tyut.edu.cn
Received Date: 2016-02-29
Rev Recd Date: 2016-04-23

Available Online: 2021-01-23

Publish Date: 2016-08-10

Abstract

Abstract

In order to integratedly utilize the relatively rich coal resource of Zhaotong mine, temperature-programmed pyrolysis experiments of Zhaotong lignite were performed in fixed bed reactor at different temperatures. The resultant coal tar and char were characterized by GC-MS and Raman Spectroscopy, respectively. Char-H₂O isothermal gasification characteristics were evaluated in fixed bed reactor at 850℃. The results show that in pyrolysis at 700℃ the cumulative content of H₂, CO and CH₄ in gases accounts for about 70%, and the growth rate of low calorific value of gas is the fastest, which is 90% based on the value at 500℃. A large number of phenolic compounds are generated at 500-700℃. Above 700℃ the decomposition reactions of the phenolic compounds is intensified. With the increase of pyrolysis temperatures, the apparent reaction rate of char decreases, while the molar ratio of CO₂ and CO increases. The molar ratio of H₂ and CO in gasification from char pyrolyzed at 700℃ was the highest.
- pyrolysis upgrading,
- release of gas,
- coal tar,
- gasification reactivity

FullText(HTML)

References(24)

References

[1]	OZTAS N A, YURUM Y.Pyrolysis of turkish zonguldak bituminous coal (1):Effect of mineral matter[J].Fuel, 2000, 79(10):1221-1227. doi: 10.1016/S0016-2361(99)00255-0
[2]	王鹏, 文芳, 步学朋, 刘玉华, 边文, 邓一英.煤热解特性研究[J].煤炭转化, 2005, 28(1):8-13. WANG Peng, WEN Fang, BU Xue-peng, LIU Yu-hua, BIAN Wen, DENG Yi-ying.Study on the pyrolysis characteristics of coal[J].Coal Convers, 2005, 28(1):8-13.
[3]	石振晶, 夏芝香, 方梦祥, 李超, 王勤辉, 骆仲泱.淮南烟煤热解及焦油析出特性[J].燃烧科学与技术, 2014, 20(1):58-64. http://www.cnki.com.cn/Article/CJFDTOTAL-RSKX201401010.htm SHI Zhen-jing, XIA Zhi-xiang, FANG Meng-xiang, LI Chao, WANG Qin-hui, LUO Zhong-yang.Pyrolysis behavior of Huainan bituminous coal and formation characteristic of tar[J].J Combust Sci Technol, 2014, 20(1):58-64. http://www.cnki.com.cn/Article/CJFDTOTAL-RSKX201401010.htm
[4]	ALONSO M J G, BORREGO A G, ALVAREZ D, MENENDEZ R.Pyrolysis behaviour of pulverised coals at different temperatures[J].Fuel, 1999, 78:1501-1513. doi: 10.1016/S0016-2361(99)00081-2
[5]	NDAJI F E, BUTTERFIELD I M, THOMAS K M.Changes in the macromolecular structure of coals with pyrolysis temperature[J].Fuel, 1997, 76(2):169-177. doi: 10.1016/S0016-2361(96)00175-5
[6]	WANG M J, TIAN J L, ROBERTS D G, CHANG L P, XIE K C.Interactions between corncob and lignite during temperature programmed co-pyrolysis[J].Fuel, 2015, 142:102-108. doi: 10.1016/j.fuel.2014.11.003
[7]	钟梅, 马凤云.不同气氛下煤连续热解产物的分配规律及产品品质分析[J].燃料化学学报, 2013, 41(12):1427-1436. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18308.shtml ZHONG Mei, MA Feng-yun.Analysis of product distribution and quality for continuous pyrolysis of coal indifferent atmospheres[J].J Fuel Chem Technol, 2013, 41(12):1427-1436. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18308.shtml
[8]	LI X H, MA J S, LI L L, LI B F, FENG J, TURMEL W, LI W Y.Semi-coke as solid heat carrier for low-temperature coal tar upgrading[J].Fuel Process Technol, 2016, 143:79-85. doi: 10.1016/j.fuproc.2015.11.013
[9]	KRERKKAIWAN S, FUSHIMI C, TSUTSUMI A, KUCHONTHARA P.Synergetic effect during co-pyrolysis/gasification of biomass and sub-bituminous coal[J].Fuel Process Technol, 2013, 115:11-18. doi: 10.1016/j.fuproc.2013.03.044
[10]	LI X J, HAYASHI J I, LI C Z.FT-Raman spectroscopic study of the evolution of char structure during the pyrolysis of a Victorian brown coal[J].Fuel, 2006, 85(12/13):1700-1707.
[11]	任海君, 张永奇, 房倚天, 王洋.煤焦与生物质焦共气化反应特性研究[J].燃料化学学报, 2012, 40(2):143-148. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract17875.shtml REN Hai-jun, ZHANG Yong-qi, FANG Yi-tian, WANG Yang.Co-gasification properties of coal char and biomass char[J].J Fuel Chem Technol, 2012, 40(2):143-148. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract17875.shtml
[12]	QI X J, GUO X, XUE L C, ZHENG C G.Effect of iron on Shenfu coal char structure and its influence on gasification reactivity[J].J Anal Appl Pyrolysis, 2014, 110:401-407. doi: 10.1016/j.jaap.2014.10.011
[13]	ZHAO B F, ZHANG X D, CHEN L, SUN L Z, SI H Y, CHEN G Y.High quality fuel gas from biomass pyrolysis with calcium oxide[J].Bioresour Technol, 2014, 156:78-83. doi: 10.1016/j.biortech.2014.01.031
[14]	杜娟, 王俊宏, 崔银萍, 何秀风, 常丽萍.西部煤热解过程中气相产物的生成与释放规律[J].中国矿业大学学报, 2008, 37(5):694-698. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD200805021.htm DU Juan, WANG Jun-hong, CUI Yin-ping, HE Xiu-feng, CHANG Li-ping.Forming and releasing of gaseous products of coal during pyrolysis in Western China[J].J China Univ Min Technol, 2008, 37(5):694-698. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD200805021.htm
[15]	朱学栋, 朱子彬, 韩崇家, 唐黎华.煤的热解研究:煤中官能团与热解生成物[J].华东理工大学学报, 2000, 26(1):14-17. http://www.cnki.com.cn/Article/CJFDTOTAL-HLDX200001003.htm ZHU Xue-dong, ZHU Zi-bin, HAN Chong-jia, TANG Li-hua.Fundamental study of coal pyrolysis:Functional group and pyrolysis products[J].J East China Univ Sci Technol, 2000, 26(1):14-17. http://www.cnki.com.cn/Article/CJFDTOTAL-HLDX200001003.htm
[16]	闫金定, 崔洪, 杨建丽, 刘振宇.热重质谱联用研究兖州煤的热解行为[J].中国矿业大学学报, 2003, 32(3):311-315. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD200303023.htm YAN Jin-ding, CUI Hong, YANG Jian-li, LIU Zhen-yu.Research on pyrolysis behavior of Yanzhou coal using TG/MS[J].J China Univ Min Technol, 2003, 32(3):311-315. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD200303023.htm
[17]	STEPHANIE G M, STEPHEN A W.Determination of polycyclic aromatic sulfur heterocycles in fossil fuel-related samples[J].Anal Chem, 1999, 71(1):58-69. doi: 10.1021/ac980664f
[18]	KONG J, ZHAO R F, BAI Y H, LI G L, ZHANG C, LI F.Study on the formation of phenols during coal flash pyrolysis using pyrolysis-GC/MS[J].Fuel Process Technol, 2014, 127:41-46. doi: 10.1016/j.fuproc.2014.06.004
[19]	谢克昌.煤的结构与反应性[M].北京:科学出版社, 2002. XIE Ke-chang.Coal Structure and its Reactivity[M].Beijing:Science Press, 2002.
[20]	ELMER B L, NATHAN D M, ALYSSA K S, MARY J W.An experimental study on the thermal decomposition of catechol[J].Proc Combust Inst, 2002, 29:2299-2306. doi: 10.1016/S1540-7489(02)80280-2
[21]	SISKIN M, ACZEL T.Pyrolysis studies on the structure of ethers and phenols in coal[J].Fuel, 1983, 62:1321-1326. doi: 10.1016/S0016-2361(83)80017-9
[22]	LI C Z.Some recent advances in the understanding of the pyrolysis and gasification behavior of Victorian brown coal[J].Fuel, 2007, 86(12/13):1664-1683.
[23]	YU J L, TIAN F J, CHOW M C, MCKENZIE L J, LI C Z.Effect of iron on the gasification of Victorian brown coal with steam:enhancement of hydrogen production[J].Fuel, 2006, 85:127-133. doi: 10.1016/j.fuel.2005.05.026
[24]	CHAO S, HU S, HE L M, XIANG J, SUN L S, SU S, JIANG L, CHEN Q D, XU C F.The synergistic effect of Ca (OH)₂ on the process of lignite steam gasification to produce hydrogen-rich gas[J].Int J Hydrogen Energy, 2014, 39:15506-15516. doi: 10.1016/j.ijhydene.2014.07.111