Effect of temperature on composition of liquid products from pine sawdust gasification
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摘要: 利用傅里叶变换红外光谱(FT-IR)和气质联用(GC/MS)技术,研究了松木屑在400~900℃气化液体产物的主要组成成分和液体产物主要化学组成的来源与转化随气化温度变化的规律。结果表明,松木屑低温气化液体产物主要为酮、呋喃和愈创木酚等含氧化合物。随气化温度升高,液体产物的组成发生显著变化,400~ 500℃主要发生愈创木酚向酚类化合物的转变,500~600℃主要发生酮、呋喃向酚类化合物的转变,600~700℃主要发生酚类向茚和PAHs (多环芳烃)的转变,700~900℃主要发生酚类化合物向PAHs的转变,900℃液体产物的组成为大分子量的PAHs。Abstract: The gasification of pine sawdust in an updraft gasifier was carried out at 400~900℃ to investigate the effect of temperature on the composition of the liquid products and their chemical origins. The liquid products were analyzed by using Fourier transform infrared spectroscopy (FT-IR) and gas chromatography/mass spectrometry (GC/MS). The results showed that the primary liquid products are mainly composed of oxygenated compounds such as ketones, furans and guaiacols. The composition of the liquid products change largely with the gasification temperature: the guaiacols are transformed to phenolics at 400~500℃; the ketones and the furans are converted to phenolics at 500~600℃; the transformation of the phenolics to indenes and PAHs (polycyclic aromatic hydrocarbons) occurs at 600~700℃ and the phenolics to PAHs at 700~900℃; at 900℃, the liquid products were exclusively composed of larger PAHs.
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Key words:
- pine sawdust /
- gasification /
- liquid products /
- FT-IR /
- GC/MS
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陈汉平, 杨海平, 李斌, 杨国来, 王贤华, 张世红. 生物质流化床气化焦油析出特性的研究[J]. 燃料化学学报, 2009,37(4):433-437. (CHEN Han-ping, YANG Hai-ping, LI Bin, YANG Guo-lai, WANG Xian-hua, ZHANG Shi-hong. Evolving characteristics of tar during biomass fluidized bed gasification[J]. Journal of Fuel Chemistry and Technology, 2009, 37(4): 433-437.) 张存兰. 生物质燃烧气化焦油成分分析研究[J]. 化学分析计量, 2009, 18(6):55-57. (ZHANG Cun-lan. Component analysis for biomass burning gasification tar[J]. Chemical Analysis and Meterage, 2009, 18(6): 55-57.) 吴正舜, 米铁, 陈义峰, 李学慧. 生物质气化过程中焦油形成机理的研究[J]. 太阳能学报, 2010, 31(2): 233-236. (WU Zheng-shun, MI Tie, CHEN Yi-feng, LI Xue-hui. The research of tar variation mechanism for biomass gasification[J]. Acta Energiae Solaris Sinica, 2010, 31(2): 233-236.) VASSILATOS V, BRAGE C, TARALAS G. The effects of temperature and additives on product composition in thermal cracking of biomass//Proceedings of the Industry and Environment Conference: Biomass for Energy. London: 1992. KINOSHITA C M, WANG Y, ZHOU J. Tar formation under different biomass gasification conditions[J]. J Anal Appl Pyrolysis, 1994, 29(2): 169-181. 李坚. 木材波谱学[M]. 北京: 科学出版社, 2003: 104-110. (LI Jian.Wood spectroscopy[M]. Beijing: Science Press, 2003: 104-110.) DEMIRBAS A. Mechanisms of liquefaction and pyrolysis reactions of biomass[J]. Energy Convers Manage, 2000, 41(6): 633-646. HORNE P A, WILLIAMS P T. Influence of temperature on the products from the flash pyrolysis of biomass[J]. Fuel, 1996, 75(9): 1051-1059. WILLIAMS P T, HORNE P A. Analysis of aromatic hydrocarbons in pyrolytic oil derived from biomass[J]. J Anal Appl Pyrolysis, 1995, 31: 15-37. McGRATH T E, CHAN W G, HAJALIGOL M R. Low temperature mechanism for the formation of polycyclic aromatic hydrocarbons from the pyrolysis of cellulose[J]. J Anal Appl Pyrolysis, 2003, 66(1/2): 51-70. SHEN D K, GU S, BRIDGWATER A V. Study on the pyrolytic behaviour of xylan-based hemicellulose using TG-FTIR and Py-GC-FTIR[J]. J Anal Appl Pyrolysis, 2010, 87(2): 199-206. SHEN D K, GU S. The mechanism for thermal decomposition of cellulose and its main products[J]. Bioresour Technol, 2009, 100(24): 6496-6504. 左宋林, 于佳, 车颂伟. 热解温度对酸沉淀工业木质素快速热解液体产物的影响[J]. 燃料化学学报, 2008, 36(2): 144-148. (ZUO Song-lin, YU Jia, CHE Song-wei. Effect of pyrolysis temperature on pyrolysate during fast pyrolysis of industrial lignin made by acid precipitation[J]. Journal of Fuel Chemistry and Technology, 2008, 36(2): 144-148.) ALEN R, KUOPPALA E, OESCH P. Formation of the main degradation compound groups from wood and its components during pyrolysis[J]. J Anal Appl Pyrolysis, 1996, 36(2): 137-148. 彭云云, 武书彬. 麦草半纤维素的快速热裂解实验研究[J]. 燃料化学学报, 2011, 39(1): 21-25. (PENG Yun-yun, WU Shu-bin. Fast pyrolysis of hemicellulose in wheat straw[J]. Journal of Fuel Chemistry and Technology, 2011, 39(1): 21-25.) KIM D H, MULHOLLAND J A, WANG D, VIOLI A. Pyrolytic hydrocarbon growth from cyclopentadiene[J]. J Phys Chem A, 2010, 114(47): 12411-12416. MORF P, HASLER P, NUSSBAUMER T. Mechanism and kinetics of homogeneous secondary reactions of tar from continuous pyrolysis of wood chips[J]. Fuel, 2002, 81(7): 843-853. BOHM H, JANDER H. PAH formation in acetylene-benzene pyrolysis[J]. Phys Chem Chem Phys, 1999, 1(16): 3775-3781. ELLIOTT D C. Relation of reaction time and temperature to chemical composition of pyrolysis oils[M]. Washington: American Chemical Society, 1987: 55-65. LI C S, SUZUKI K. Tar property, analysis, reforming mechanism and model for biomass gasification-An overview[J]. Renewable Sustainable Energy Rev, 2009, 13(3): 594-604.
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