Fundamental study on Chinese herb residue pyrolysis and gasification by combining fluidized bed and fixed bed

WANG Yin; LIU Shu-yuan; REN Ming-wei; XU Guang-wen

Volume 41 Issue 03

Mar. 2013

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Article Navigation > Journal of Fuel Chemistry and Technology > 2013 > 41(03): 294-301

WANG Yin, LIU Shu-yuan, REN Ming-wei, XU Guang-wen. Fundamental study on Chinese herb residue pyrolysis and gasification by combining fluidized bed and fixed bed[J]. Journal of Fuel Chemistry and Technology, 2013, 41(03): 294-301.

Citation:

WANG Yin, LIU Shu-yuan, REN Ming-wei, XU Guang-wen. Fundamental study on Chinese herb residue pyrolysis and gasification by combining fluidized bed and fixed bed[J]. Journal of Fuel Chemistry and Technology, 2013, 41(03): 294-301.

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Fundamental study on Chinese herb residue pyrolysis and gasification by combining fluidized bed and fixed bed

1.
State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2.
Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;
3.
CNOOC Dongfang Petrochemical Ltd. Dongfang 572600, China

Received Date: 2012-08-06
Rev Recd Date: 2012-10-01
Publish Date: 2013-03-30

Abstract

Abstract

The tar and char from a fluidized bed Chinese herb residue (CHR) pyrolysis were cracked and gasified in a fixed char bed. The change in chemical species of tar before and after passing through a fixed char bed was analyzed. The results show that increasing the residence time of tar and pyrolysis gas in the char bed from 0 s to 0.95 s causes a significant decrease in the chemical species containing -OH, C-H, C-O, C=O and C=C groups, but leads to an obvious increase in the aromatic species. Introducing steam into the char bed results in the formation of more species containing aromatic rings, C-O and -OH groups, while adding the oxygen to the atmosphere increases the amount of aromatic components but has little effect on the amount of species containing -OH, C-H, C=O, C=C and C-O. Both steam and oxygen are effective to remove tar from the gasification gas, but the effect of steam is relatively weaker. Introducing steam together with oxygen will have a rather higher tar removal efficiency, and the tar in the producer gas can be ignored.
- two-stage gasification,
- Chinese herb residue,
- tar cracking/reforming,
- char catalyst

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References(33)

References

许光文, 纪文峰, 万印华, 刘春朝. 轻工业纤维素生物质过程残渣能源化技术[J]. 化学进展, 2007, 19(7): 1164-1176. (XU Guang-wen, JI Wen-feng, WAN Yin-hua, LIU Chun-chao. Energy production with light industrial biomass residues rich in cellulose[J]. Progress in Chemistry, 2007, 19(7): 1164-1176.)

邹艳敏, 吴静波, 仰榴青, 赵江丽, 吴向阳. 中药渣的综合利用研究进展[J]. 江苏中医药, 2008, 40(12): 113-115. (ZOU Yan-min, WU Jing-bo, YANG Liu-qing,ZHAO Jiang-li,WU Xiang-yang.Research progress of Chinese herbs residue utilization[J]. Jiangsu Chinese Medicine, 2008, 40(12): 113-115.)

DEVI L, PTASINSKI K J, JANSSEN F J J G. A review of the primary measures for tar elimination in biomass gasification processes[J]. Biomass Bioenergy, 2003, 24(2): 125-140.

MILNE T A, EVANS R J. Biomass gasifier "tars": Their nature, formation, and conversion. Colorado: NREL, 1998.

HAN J, KIM H. The reduction and control technology of tar during biomass gasification/pyrolysis: An overview[J]. Renewable Sustainable Energy Rev, 2008, 12(2): 397-416.

ZIAD A E, BRAMMER E A, BREM G. Review of catalysts for tar elimination in biomass gasification processes[J]. Ind Eng Chem Res, 2004, 43(22): 6911-6919.

BRANDT P, LARSEN E, HENRIKSEN U. High tar reduction in a two-stage gasifier[J]. Energy Fuels, 2000, 14(4): 816-819.

HENRIKSEN U, AHRENFELDT J, JESEN T K, GOBEL B, BENTZEN J D, HINDSGAUL C, SORENSEN L H. The design, construction and operation of a 75 kW two-stage gasifier[J]. Energy, 2006, 31(10/11): 1542-1553.

MUN T Y, KANG B S, KIM J S. Production of a producer gas with high heating values and less tar from dried sewage sludge through air gasification using a two-stage gasifier and activated carbon[J]. Energy Fuels, 2009, 23(6): 3268-3276.

SONI C G, WANG Z, DALAI A K, PUGSLEY T, FONSTAD T. Hydrogen production via gasification of meat and bone meal in two-stage fixed bed reactor system[J]. Fuel, 2009, 88(5): 920-925.

ENCINAR J M, BELTRAN F J, BERNALTE A, RAMIRO A, GONZALEZ J F. Pyrolysis of two agricultural residues: Olive and grape bagasse: Influence of particle size and temperature[J]. Biomass Bioenergy, 1996, 11(5): 397-409.

WANG Y, YOSHIKAWA K, NAMIOKA T, HASHIMOTO Y. Performance optimization of two-staged gasification system for woody biomass[J]. Fuel Process Technol, 2007, 88(3): 243-250.

王磊, 吴创之, 陈平, 阴秀丽, 谢军. 生物质气化焦油在高温木炭床上的裂解试验研究[J]. 可再生能源, 2005, 5: 30-34. (WANG Lei, WU Chuang-zhi,CHEN Ping,YIN Xiu-li, XIE Jun. Study of biomass tar cracking on high temperature char bed[J]. Renew Energ, 2005, 5: 30-34. )

苏毅, 陆方, 罗永浩, 杜云川. 60kW 两段式秸秆气化炉运行特性[J]. 太阳能学报, 2010, 31(1): 124-127. (SU Yi, LU Fang, LUO Yong-hao, DU Yun-chuan. Experimental study of the running characteristics about a 60KW two-stage straw gasifier[J]. Acta Energiae Solaris Sinica, 2010, 31(1):124-127.)

许光文, 刘新华, 高士秋. 制备无焦油产品气的贫氧流化燃烧下吸式气化方法及装置: 中国, CN1916123. 2005-08-19. (XU Guang-wen, LIU Xin-hua, GAO Shi-qiu. Method and equipment for producing fuel gas without tar via lean oxygen fluidized combustion coupled with downdraft gasification: CN, 1916123. 2005-08-19.)

ZENG X, WANG Y, YU J, WU S, ZHONG M, XU S, XU G. Coal pyrolysis in a fluidized bed for adapting to a two-stage gasification process[J]. Energy Fuels, 2011, 25(3), 1092-1098.

ZENG X, WANG Y, YU J, WU S, ZHONG M, XU S, XU G. Gas upgrading in a downdraft fixed-bed reactor downstream of a fluidized-bed coal pyrolyzer[J]. Energy Fuels, 2011, 25(11): 5242-5249.

ZIAD A E. Biomass char as an in-situ catalyst for tar removal in gasification systems. Enschede, Netherlands: Twente University, 2008.

TANCREDI N, CORDERO T, RODRIGUEZ- MIRASOL J, RODRIGUEZ J J. CO₂ gasification of Eucalyptus wood chars[J]. Fuel, 1996, 75(13): 1505-1508.

SIMELL P, LEPPALAHTI J K, KURKELA E. Tar-decomposing activity of carbonate rocks under high CO₂ partial pressure[J]. Fuel, 1995, 74(6): 938-945.

GIL J, CABALLEROA M A, MARTIN J A, AZNAR M P, CORELLA J. Biomass gasification with air in a fluidized bed: Effect of the in-bed use of dolomite under different operation conditions[J]. Ind Eng Chem Res, 1999, 38(11): 4226-4235.

ORIO A, CORELLA J, NARVAEZ I. Performance of different dolomites on hot raw gas cleaning from biomass gasification with air[J]. Ind Eng Chem Res, 1997, 36(9): 3800-3808.

SUTTON D, KELLEHER B, ROSS J R H. Review of literature on catalysts for biomass gasification[J]. Fuel Process Technol, 2001, 73(3):155-173.

LEE S W, NAM S S, KIM S B, LEE K W, CHOI C S. The effect of Na₂CO₃ on the catalytic gasification of rice straw over nickel catalysts supported on Kieselguhr[J]. Korean J Chem Eng, 2000, 17(2): 174-178.

DEVI L, PTASINSKI K J, JANSSEN F J J G, PAASEN S V B, BERGMAN P C A, KIEL J H A. Catalytic decomposition of biomass tars: Use of dolomite and untreated olivine[J]. Renew Energ, 2005, 30(4): 565-587.

CORELLA J, ORIO A, AZNAR P. Biomass gasification with air in fluidized bed: Reforming of the gas composition with commercial steam reforming catalysts[J]. Ind Eng Chem Res, 1998, 37(12): 4617-4624.

GUAN Y, GUO L J, ZHANG X M, LV Y J, HAO X H. Gasification of biomass model compounds in supercritical water[J]. Chem Ind Eng, 2006, 57(6): 1426-1431.

SIMELL P A, HIRVENSALO E K, SMOLANDER V T. Steam reforming of gasification gas tar over dolomite with benzene as a model compound[J]. Ind Eng Chem Res, 1999, 38(4): 1250-1257.

JESS A. Mechanisms and kinetics of thermal reactions of aromatic hydrocarbons from pyrolysis of solid fuels[J]. Fuel, 1996, 75(12): 1441-1448.

HOUBEN M P, LANGE H C, STEENHOVEN A A. Tar reduction through partial combustion of fuel gas[J]. Fuel, 2005, 84(7/8): 817-824.

DAYTON D C, EVANS R J. Laboratory gasification studies via partial oxidation of biomass pyrolysis vapors//Proceedings of the third biomass conference of the Americas. Canada: 1997, 1: 673-682.

MINKOVA V, RAZVIGOROVA M, BJORNBOM E, ZANZI R, BUDINOVA T, PETROV N. Effect of water and biomass nature on the yield and quality of the pyrolysis products from biomass[J]. Fuel Process Technol, 2001, 70(1): 53-61.

HOSOKAI S, KUMABE K, OHSHITA M, NORINAGA K, LI C Z, HAYASHI J I. Mechanism of decomposition of aromatics over charcoal and necessary condition for maintaining its activity[J]. Fuel, 2008, 87(13/14): 2914-2922.

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