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杂原子介孔Co-MCM-41分子筛的制备及其吸附脱氮性能

洪新 ,  唐克

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引用本文: 洪新, 唐克. 杂原子介孔Co-MCM-41分子筛的制备及其吸附脱氮性能[J]. 燃料化学学报, 2015, 43(6): 720-727. shu
Citation:  HONG Xin, TANG Ke. Preparation and adsorption denitrification of heteroatoms mesoporous molecular sieve Co-MCM-41[J]. Journal of Fuel Chemistry and Technology, 2015, 43(6): 720-727. shu

杂原子介孔Co-MCM-41分子筛的制备及其吸附脱氮性能

    通讯作者: 唐克,Tel:86-416-4198019,Fax:86-416-4198019,E-mail:tangke0001@163.com。
  • 基金项目:

    辽宁省自然科学基金(2014020113) (2014020113)

    辽宁省高等学校优秀人才支持计划(LJQ2012057) (LJQ2012057)

    辽宁工业大学教师启动资金(X201311)。 (X201311)

摘要: 采用水热法合成了介孔MCM-41和Co-MCM-41分子筛,并利用XRD、FT-IR、低温N2吸附-脱附和NH3-TPD等方法对合成的分子筛进行了表征。考察了晶化时间、晶化温度、陈化时间对合成介孔Co-MCM-41分子筛的影响,确定较适宜的合成条件为陈化时间1 h,晶化温度110 ℃,晶化时间2 d。XRD 和FT-IR表征结果说明,Co原子已经进入MCM-41的骨架。MCM-41和Co-MCM-41的平均孔径均为2.82 nm,BET比表面积分别为986.42和 637.69 m2/g,孔容分别为0.762 1和0.537 2 m3/g。NH3-TPD的表征结果表明,MCM-41和Co-MCM-41的酸性都较弱,但Co-MCM-41的酸性明显强于MCM-41。在此基础上,利用合成的MCM-41和Co-MCM-41吸附脱除氮含量为1 737.35 μg/g的模拟燃料中的喹啉。喹啉分子尺寸的模拟结果为0.711 6 nm × 0.500 2 nm,说明其可以很容易地进入MCM-41和Co-MCM-41的介孔孔道中。Co-MCM-41分子筛的氮脱除率明显高于MCM-41,这是由于其较强的酸性及与喹啉之间的化学吸附,而且,Co-MCM-41吸附脱氮具有较好的再生性能。

English

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  • 收稿日期:  2014-11-28
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