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›› 2008, Vol. 8 ›› Issue (2): 295-299.

• 过程与工艺 • 上一篇    下一篇

KCl气溶胶对整体式镍基催化剂重整性能的影响

高妍 王铁军 王晨光 张琦 吴创之 马隆龙   

  1. 中国科学院广州能源研究所 中国科学院广州能源研究所 中国科学院广州能源研究所 东北大学 中国科学院广州能源所 中国科学院广州能源研究所
  • 收稿日期:2007-09-26 修回日期:2007-12-28 出版日期:2008-04-20 发布日期:2008-04-20
  • 通讯作者: 王铁军

Effects of Potassium Chloride Aerosol on Ni-based Monolithic Catalyst for Reforming of Biomass Fuel Gas

GAO Yan WANG Tie-jun WANG Chen-guang WU Chuang-zhi MA Long-long   

  1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences Guangzhou Institute of Energy Conversion, CAS, Guangzhou Institute of Energy Conversion, CAS,
  • Received:2007-09-26 Revised:2007-12-28 Online:2008-04-20 Published:2008-04-20
  • Contact: WANG Tie-jun

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摘要： 采用分步浸渍法制备了以堇青石为载体的Ni-MgO/g-Al2O3整体式催化剂，在800℃时，以300 mL/min N2作为载气，将KCl沉积在催化剂上，考察碱金属盐气溶胶对Ni-MgO/g-Al2O3整体式催化剂重整净化生物质燃气性能的影响，并利用ICP, BET, XRD和SEM等测试手段对沉积前后的催化剂性能进行表征. 结果表明，KCl沉积后的催化剂比表面积降低，催化剂的活性受到影响，CH4转化率降低，H2/CO也略有降低. 750℃时，在模拟生物质燃气中添加KCl气溶胶，经过17 h，CH4的转化率由88.56%降至32%，重整后H2体积分数由35.09%降至26.74%，CO体积分数由33.19%降至29.78%；而未添加KCl时，经过60 h，CH4转化率始终保持在90%左右，重整后各气体组分基本无明显变化.

关键词: 生物质粗燃气, 催化重整, 碱金属气溶胶

Abstract: Ni-MgO/g-Al2O3 monolithic catalyst was prepared by a two-step impregnation method. To investigate the deactivation of catalysts by alkali chloride aerosol, a 300 mL/min nitrogen flow containing KCl aerosol particles was led through a catalyst bed at 800℃. The catalysts before and after deposition were characterized by ICP, BET and SEM. The results showed that the activity of the catalysts had decreased due to the reduction of the surface area of the catalyst after deposition of KCl aerosol. Accordingly, the conversion rate of CH4 and H2/CO decreased. Under the reaction condition of biomass fuel gas containing KCl aerosol at 750℃, the conversion rate of CH4 decreased from 87.24% to 32% after 17 h reaction, besides, volumetric fraction in the outlet gas of H2 decreased from 35.09% to 26.74%, that of CO decreased from 33.19% to 29.78%, however, no deactivation appeared under the condition of biomass fuel gas without KCl aerosol.

Key words: biomass fuel gas, catalytic reforming, alkali chloride aerosol

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