CH<sub>4</sub> release character from pressurized fast pyrolysis of lignite in CO atmosphere

GAO Song-ping; WANG Jian-fei; ZHAO Jian-tao; WANG Zhi-qing; FANG Yi-tian; HUANG Jie-jie

Volume 42 Issue 06

Jun. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(06): 641-649

GAO Song-ping, WANG Jian-fei, ZHAO Jian-tao, WANG Zhi-qing, FANG Yi-tian, HUANG Jie-jie. CH4 release character from pressurized fast pyrolysis of lignite in CO atmosphere[J]. Journal of Fuel Chemistry and Technology, 2014, 42(06): 641-649.

Citation:

GAO Song-ping, WANG Jian-fei, ZHAO Jian-tao, WANG Zhi-qing, FANG Yi-tian, HUANG Jie-jie. CH₄ release character from pressurized fast pyrolysis of lignite in CO atmosphere[J]. Journal of Fuel Chemistry and Technology, 2014, 42(06): 641-649.

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CH₄ release character from pressurized fast pyrolysis of lignite in CO atmosphere

1.
Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
Taiyuan Institute of Technology, Taiyuan 030008, China

Received Date: 2014-01-06
Rev Recd Date: 2014-03-17
Publish Date: 2014-06-30

Abstract

Abstract

Fast pyrolysis of Huolinhe lignite was carried out under pressure in a tubular reactor, and the CH₄ evolution at CO atmosphere was examined. CO dissociation state O(a) adsorbed on coal is an active center. The stronger electronegative O could induce the electron cloud of other atoms around O(a) atom to offset to it, which could weaken the strength of original chemical bonds and promote their breaking. These result in the cracks of the aromatic ring, side chain, ether linkages and aliphatic chain in the char, which could produce more free radicals. The free radicals could stabilize the fragments produced in the pyrolysis, and lead to more CH₄ generated and involved. Therefore, the CH₄ yield is higher under CO than it in N₂. The CH₄ yield increases by 12.5% under CO compared with N₂ at 900 ℃ and 1.0 MPa. The CH₄ yield increases with raise of temperature and pressure.
- CO atmosphere,
- pressure,
- fast pyrolysis,
- the CH₄ evolution,
- the crack of the chemical bonds

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References(32)

References

郭树才. 煤化工工艺学[M]. 2版. 北京: 化学工业出版社, 2007. (GUO Shu-cai. Coal chemical technology[M]. 2nd ed. Beijing: Chemical Industry Press, 2007.)

伏义路, 黄志刚, 庄叔贤, 范崇正, 孙汉芳. 高浓度CO变换-甲烷化反应积碳的初步研究[J]. 燃料化学学报, 1983, 12(1): 25-31. (FU Yi-lu, HUANG Zhi-gang, ZHUANG Shu-xian, FAN Chong-zheng, SUN Han-fang. Preliminary investigation of carbon deposition in the shift-methanation reaction with high CO concentration[J]. Journal of Fuel Chemistry and Technology, 1983, 12(1): 25-31.)

许世森, 张东亮, 任永强. 大规模煤气化技术[M]. 北京: 化学工业出版社, 2007. (XU Shi-shen, ZHANG Dong-liang, REN Yong-qiang. Large-scale coal gasification technology[M]. Beijing: Chemical Industry Press, 2007.)

MA Z H, ZHU Z B, ZHANG C F. Flash hydropyrolysis of zalannoer lignite[J]. Fuel Process Technol, 1994, 38(2): 99-109.

KARCZ A, PORADA S. Formation of C1-C3 hydrocarbons during pressure pyrolysis and hydrogasification in relation to structural changes in coal[J]. Fuel, 1995, 74(6): 806-809.

金海华, 朱子彬. 煤快速热解获得液态烃和气态烃的研究I气氛影响的考察[J]. 化工学报, 1992, 43(6): 719-726. (JIN Hai-hua, ZHU Zi-bin. Flash pyrolysis of brown coal for obtaining liquid and gaseous hydrocarbons Ⅰeffect of pyrolysis atmosphere[J]. Journal of Chemical Industry and Engineering, 1992, 43(6): 719-726.)

SUNDARAM M S, STEINBERG M, FALLON P T. Flash pyrolysis of coal in reactive and non-reactive gaseous environments[J]. Am Chem Soc Div Fuel Chem, 1983, 25(5): 106-129.

FALLON P T, BHATT B, STEINBERG M. The flash hydropyrolysis of lignite and sub-bituminous coals to both liquid and gaseous hydrocarbon products[J]. Fuel Process Technol, 1980, 3(3/4): 155-168.

朱子彬, 王欣荣, 马智华, 俞丰, 徐志刚, 张成芳, 黄瀛华. 烟煤快速加氢热解的研究I.气氛影响的考察[J]. 燃料化学学报, 1996, 24(5): 411-415. (ZHU Zi-bin, WANG Xin-rong, MA Zhi-hua, YU Feng, XU Zhi-gang, ZHANG Zhi-fang, HUANG Ling-hua. Study on flash hydropyrolysis of bituminous coalⅠ. Effect of atmospheres[J]. Journal of Fuel Chemistry and Technology, 1996, 24(5): 411-415.)

廖洪强, 孙成功, 李保庆. 煤与焦炉气共热解特性研究Ⅲ焦油分析[J]. 燃料化学学报, 1998, 26(1): 7-12. (LIAO Hong-qiang, SUN Cheng-gong, LI Bao-qing. Copyrolysis of coal with coke-oven gas Ⅲ. Analyses of tar[J]. Journal of Fuel Chemistry and Technology, 1998, 26(1): 7-12.)

廖洪强, 孙成功, 李保庆. 焦炉气气氛下煤加氢热解研究[J]. 煤炭转化, 1997, 20(2): 38-43. (LIAO Hong-qiang, SUN Cheng-gong, LI Bao-qing. Progress of coal hydropyrolysis with coke-oven gas[J]. Coal Conversion, 1997, 20(2): 38-43.)

廖洪强, 李保庆, 张碧江. 煤—焦炉气共热解特性研究Ⅳ.甲烷和一氧化碳对热解的影响[J]. 燃料化学学报, 1998, 26(1): 13-17. (LIAO Hong-qiang, LI Bao-qing, ZHANG Bi-jiang. Copyrolysis of coal with coke oven gas(Ⅳ). Influence of CH₄ and CO on pyrolysis yields[J]. Journal of Fuel Chemistry and Technology, 1998, 26(1): 13-17.)

BRACKMAN-DANHEUX C, CYPRES R, FONTANA A, LAURENT P, VAN HOEGAERDEN M. Coal hydromethanolysis with coke-oven gas.1.Influence of temperature on the pyrolysis yields[J]. Fuel, 1992, 71(3): 251-255.

ZHONG M, ZHANG Z K, ZHOU Q, YUE J R, GAO S Q, XU G W. Continuous high-temperature fluidized bed pyrolysis of coal in complex atmospheres: Product distribution and pyrolysis gas[J]. J Anal Appl Pyrolysis, 2012, 97(9): 123-129.

张晓方, 金玲, 熊燃, 汪印, 刘云义, 许光文. 热分解气氛对流化床煤热解制油的影响[J]. 化工学报, 2009, 60(9): 2299-2307. (ZHANG Xiao-fang, JIN Ling, XIONG Ran, WANG Yin, LIU Yun-yi, XU Guang-wen. Effect of reaction atmosphere on tar production from coal pyrolysis in fluidized bed reactor[J]. CIESC Journal, 2009, 60(9): 2299-2307.)

ZHANG X F, DONG L, ZHANG J W, TIAN Y J, XU G W. Coal pyrolysis in a fluidized bed reactor simulating the process conditions of coal topping in CFB boiler[J]. J Anal Appl Pyrolysis, 2011, 91(1): 241-250.

高松平, 赵建涛, 王志青, 王建飞, 房倚天, 黄戒介. CO对褐煤快速热解行为的影响[J]. 燃料化学学报, 2013, 41(5): 550-557. (GAO Song-ping, ZHAO Jian-tao, WANG Zhi-qing, WANG Jian-fei, FANG Yi-tian, HUANG Jie-jie. The Effect of CO on the fast pyrolysis behaviors of lignite[J]. Journal of Fuel Chemistry and Technology, 2013, 41(5): 550-557.)

SLAGHUIS J H, VAN DER WALT T J. Increased reactivity of char due to pyrolysis in areactive atmosphere[J]. Fuel, 1991, 70(7): 831-834.

SUUBERG E M, PETERS W A, HOWARD J B. Product compositions in rapid hydropyrolysis of coal[J]. Fuel, 1980, 59(6): 405-412.

高松平, 赵建涛, 王志青, 王建飞, 房倚天, 黄戒介. CO₂对褐煤快速热解行为的影响[J]. 燃料化学学报, 2013, 41(3): 257-264. (GAO Song-ping, ZHAO Jian-tao, WANG Zhi-qing, WANG Jian-fei, FANG Yi-tian, HUANG Jie-jie. The effect of CO₂ on the fast pyrolysis behaviors of lignite[J]. Journal of Fuel Chemistry and Technology, 2013, 41(3): 257-264.)

GAO S P, WANG J F, WANG Z Q, ZHAO J T, FANG Y T. Effect of CO on the CH₄ evolution during fast pyrolysis of lignite in reductive atmospheres[J]. J Anal Appl Pyrolysis, 2014, 106: 104-111.

KARCZ A, PORADA S. Kinetics of the formation of C1-C3 hydrocarbons in pressure pyrolysis of coal[J]. Fuel Process Technol, 1990, 26(1): 1-13.

YANG H P, CHEN H P, JU F D, YAN R, ZHANG S H. Influence of pressure on coal pyrolysis and char gasification[J]. Energy Fuels, 2007, 21(6): 3165-3170.

徐小云, 伏义路. CO的吸附、歧化及其与水反应的程序升温研究[J]. 燃料化学学报, 1987, 15(1): 42-48. (Xu Xiao-yun, Fu Yi-lu. Investigation of chemisorption and disproportionation of CO and its reaction with H₂O by temperature programmed heating[J]. Journal of Fuel Chemistry and Technology, 1987, 15(1): 42-48.)

ZAGLI A E, FALCONER J L, KEENAN C A. Methanation on supported nickel catalysts using temperature programmed heating[J]. J Catal, 1979, 56(3): 453-467.

GALUSZKA J, CHANG J R, AMENOMIYA Y. Disproportionation of carbon monoxide on supported nickel catalysts[J]. J Catal, 1981, 68(1): 172-181.

RABO J A, RISCH A P, POUTSMA M L. Reactions of carbon monoxide and hydrogen on cobalt, nickel, ruthenium, and palladium[J]. J Catal, 1978, 53(3): 295-311.

伏义路, 李锡青, 徐小云. CO的吸附和歧化反应及其在变换—甲烷化反应中的作用[J]. 燃料化学学报, 1984, 12(4): 316-322. (FU Yi-lu, LI Xi-qing, XU Xiao-yun. The role of chemisorptions and disproportionation of CO in the shift-methatnation reaction[J]. Journal of Fuel Chemistry and Technology, 1984, 12(4): 316-322.)

李锡青, 伏义路, 黄志刚. 镍基催化剂上CO和H₂O吸附与反应的红外光谱研究[J]. 物理化学学报, 1985, 1(1): 22-31. (LI Xi-qing, FU Yi-lu, HUANG Zhi-gang. Infraned study of adsorption and reaction of CO and H₂O on Ni catalyst[J]. Acta Phyico-Chemica Sinica, 1985, 1(1): 22-31.)

DOOLAN K R, MACKIE J C. Products from the rapid pyrolysis of a brown coal in inert and reducing atmospheres[J]. Fuel, 1985, 64(3): 400-405.

FERMOSO J, GIL M V, BORREGO A G, PEVIDA C, PIS J J, RUBIERA F. Effect of the pressure and temperature of devolatilization on the morphology and steam gasification reactivity of coal chars[J]. Energy Fuels, 2010, 24(10): 5586-5595.

冯杰, 李文英, 谢克昌. 傅立叶红外光谱法对煤结构的研究[J]. 中国矿业大学学报, 2002, 31(5): 362-363. (FENG Jie, LI Wen-ying, XIE Ke-chang. Research on coal structure using FT-IR[J]. Journal of China University of Mining & Technology, 2002, 31(5): 362-363.)

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