Effect of calcination temperature on Ni-Mg based monolithic catalyst for biomass gas reforming reaction
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摘要: 采用浸渍法制备了Ni、Mg双金属负载在堇青石表面形成的蜂窝状催化剂,研究了焙烧温度对催化剂结构和生物质粗燃气重整反应性能的影响.结果表明,在不同焙烧温度下主要有NiO和NiMgO2固溶体物相生成.相比于其他焙烧温度,催化剂在650 ℃焙烧温度下更有利于镍活性金属位的分散和活性位数量的增加.在干重整反应条件下,CH4、CO2的转化率以及H2、CO产率随焙烧温度的升高呈现先增加后降低的变化趋势,在650 ℃焙烧温度下达到最高.在水蒸气重整反应条件下主要发生烃类产物与H2O和CO2的重整反应以及水煤气变换反应,焙烧温度的升高有利于水煤气反应的进行.此外,焙烧温度对于干重整反应条件下的H2/CO体积比调节影响较小,而对于水蒸气重整反应条件下的H2/CO体积比可进行选择性调节.Abstract: The Ni-Mg based monolithic catalyst was prepared by impregnation method. Effects of calcination temperature on microstructure and biomass gases reforming performances of the catalyst were investigated. The results indicated that there was the formation of NiO and NiMgO2 in the catalyst during calcination at different temperatures. Compared to other calcination temperatures, calcinating at 650 ℃ facilitated the dispersion of NiO on the cordierite and the increase of active sites. Under the dry reforming condition, conversion of CH4 and CO2 increased first, and then decreased gradually with the increase of calcination temperature. The CH4 and CO2 conversion reached the highest value as the calcination temperature is 650 ℃. A similar trend was observed for the yield of H2 and CO. Under the steam reforming condition, increasing calcination temperature promoted water gas shift reaction. In addition, changing calcination temperature may adjust selectively the ratio of H2/CO under the steam reforming condition.
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官巧燕, 廖福霖, 罗栋粲. 国内外生物质能发展综述[J]. 农机化研究, 2007, (11): 20-24. (GUAN Qiao-yan, LIAO Fu-lin, LUO Dong-can. Review on the development of bioenergy in China and the world[J]. Journal of Agricultural Mechanization Research, 2007, (11): 20-24.) 林伟刚, 宋文立. 丹麦生物质发电的现状和研究发展趋势[J]. 燃料化学学报, 2005, 33(6): 650-655. (LIN Wei-gang, SONG Wen-li. Power production from biomass in Denmark[J]. Journal of Fuel Chemistry and Technology, 2005, 33(6): 650-655. ) 汪俊锋, 常杰, 阴秀丽, 付严. 生物质气催化合成甲醇的研究[J]. 燃料化学学报, 2005, 33(1): 58-61. (WANG Jun-feng, CHANG Jie, YIN Xiu-li, FU Yan. Catalytic synthesis of methanol from biomass-derived syngas[J]. Journal of Fuel Chemistry and Technology, 2005, 33(1): 58-61.) CORELLA J, SANZ A. Modeling circulating fluidized bed biomass gasifiers: A pseudo-rigorous model for stationary state[J]. Fuel Process Technol, 2005, 86(9): 1021-1053. KOBAYASHI Y, HORIGUCHI J, KOBAYASHI S, YAMAZAKI Y, OMATA K, NAGAO D, KONNO M, YAMADA M. Effect of NiO content in mesoporous NiO-Al2O3 catalysts for high pressure partial oxidation of methane to syngas[J]. Appl Catal A: Gen, 2011, 395(1/2): 129-137. DELGADO J, AZNAR M P, CORELLA J. Biomass gasification with steam in fluidized bed: Effectiveness of CaO, MgO and CaO-MgO for hot gas cleaning[J]. Ind Eng Chem Res, 1997, 36(5): 1535-1543. ENCINAR J M, BELTRN F J, RAMIRO A, GONZLEZ J F. Pyrolysis/gasification of agricultural residues by carbon dioxide in the presence of different additives: Influence of variables[J]. Fuel Process Technol, 1998, 55(3): 219-233. AZNAR M P, COREL J, LAHO Z J. Improved steam gasification of lignocellulosic residues in a fluidized bed with commercial steam reforming catalyst[J]. Ind Eng Chem Res, 1993, 32(1): 1-10 BAKER E G, MUDGE L K, WILCOX W A. Proceedings of conference on developments in thermochemical biomass conversion. Blackie Academic & Professional, Banff, Canada, 1996. YAMAGUCHI T, YAMASAKI K, YOSHIDA O. Deactivation and regeneration of catalyst for steam gasification of wood to methanol synthesis gas[J]. Ind Eng Chem Pro Res Dev, 1986, 25(2): 239-243. RICHARDSON S M, GRAY M R. Enhancement of residue hydroprocessing catalysts by doping with alkali metals[J]. Energy Fuels, 1997, 11(6): 1119-1126. BANGALA D N, ABATZOGLOU N, CHORNET E. Steam reforming of naphthalene on Ni-Cr/Al2O3 catalysts doped with MgO, TiO2 and La2O3[J]. AIChE J, 1998, 44(4): 927-936. EDVINSSON A R, NYSTREM M, SELLIN A. Development of a monolith-based process for H2O2 production: From idea to large-scale implementation[J]. Catal Today, 2001, 69(1/4): 247-252. LIU W, WILLIAM P A, SORENSEN C M, BOGER T. Monolith reactor for the dehydrogenation of ethylbenzene to styrene[J]. Ind Eng Chem Res, 2002, 41(13): 3131-3138. QIU M, LI Y, WANG T, ZHANG Q, WANG C, ZHANG X, WU C, MA L, LI K. Upgrading biomass fuel gas by reforming over Ni-MgO/γ-Al2O3 cordierite monolithic catalysts in the lab-scale reactor and pilot-scale multi-tube reformer[J]. Appl Energy, 2011, 90(1): 3-10. DJAIDJA A, LIBS S, KIENNEMANN A, BARAMA A. Characterization and activity in dry reforming of methane on NiMg/Al and Ni/MgO catalysts[J]. Catal Today, 2006, 113(3/4): 194-200. BRADFORD M C J, VANNICE M A. Catalytic reforming of methane with carbon dioxide over nickel catalysts I. Catalyst characterization and activity[J]. Appl Catal A: Gen, 1996, 142(1): 73-96.
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