催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (6): 1069-1075.DOI: 10.3724/SP.J.1088.2011.10122

• 研究论文 • 上一篇    下一篇

短孔道 Cu-Mn/Zr-Ce-SBA-15 催化剂的制备及其催化甲苯燃烧性能

袁金芳1,2, 李健生1,a, 王放1, 孙秀云1, 沈锦优1, 韩卫清1, 王连军1,b   

  1. 1南京理工大学, 江苏省化工污染与资源化高校重点实验室, 江苏南京 210094; 2河南大学精细化学与工程研究所, 河南开封 475001
  • 收稿日期:2011-01-22 修回日期:2011-04-30 出版日期:2011-06-21 发布日期:2014-10-31

Preparation of Cu-Mn/Zr-Ce-SBA-15 Catalyst with Short Mesochannels and Its Catalytic Performance for Toluene Combustion

YUAN Jinfang1,2, LI Jiansheng1,a, WANG Fang1, SUN Xiuyun1, SHEN Jinyou1, HAN Weiqing1, WANG Lianjun1,b   

  1. 1Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China; 2Institute of Fine Chemical and Engineering, Henan University, Kaifeng 475001, Henan, China
  • Received:2011-01-22 Revised:2011-04-30 Online:2011-06-21 Published:2014-10-31

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1288

被引次数

23

摘要： 采用水热法制备了 Zr-Ce-SBA-15(ZCS) 介孔材料, 并以它为载体, 通过浸渍法制备了不同 Cu/Mn 比和 Cu-Mn 含量的 Cu-Mn/ZCS 催化剂. 采用 N2 吸附-脱附、透射电镜、扫描电镜、X 射线衍射和 X 射线光电子能谱 (XPS) 等手段对催化剂进行了表征, 并在微型固定床反应器上评价了催化剂催化甲苯燃烧性能. 结果表明, Cu-Mn/ZCS 催化剂具有六方板状形貌和高度有序的短孔道介孔结构 (孔道长 0.4~0.5 μm). 20%Cu-Mn/ZCS 催化剂的比表面积、孔体积和孔径分别为 296 m2/g, 0.42 cm3/g 和 6.4 nm. 与长孔道的 20%Cu-Mn/SBA-15 催化剂 (孔道长 1~2 μm) 相比, 20%Cu-Mn/ZCS 催化剂上甲苯燃烧反应的 T95 (转化率达 95% 以上的反应温度) 从 284 oC 降至 270 oC, 表明短孔道 Cu-Mn/ZCS 催化剂具有更高的催化活性.

关键词: 短孔道, 铜, 锰, 锆, 铈, SBA-15 分子筛, 甲苯, 催化燃烧

Abstract: The mesoporous Zr-Ce-SBA-15 (ZCS) material with short mesochannels was synthesized through a hydrothermal route. A series of Cu-Mn/ZCS catalyst samples with different Cu/Mn ratios and Cu-Mn contents were prepared by impregnation. The structure of the catalyst samples was characterized by N2 adsorption-desorption, transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The catalytic performance of the catalyst for toluene combustion was evaluated in a fixed-bed microreactor. The results reveal that the Cu-Mn/ZCS catalyst has unique hexagonal platelet morphology and possesses highly ordered two-dimensional hexagonal mesoporous structure with short channels (0.4–0.5 μm). The specific surface area, pore volume, and pore diameter of the 20%Cu-Mn/ZCS are 296 m2/g, 0.42 cm3/g, and 6.4 nm, respectively. Compared with 20%Cu-Mn/SBA-15 with longer channel length (1–2 μm), the temperature of 95% toluene conversion (T95) over 20%Cu-Mn/ZCS decreases from 284 to 270 oC, indicating that the short channeled Cu-Mn/ZCS catalyst possesses higher catalytic activity than that over Cu-Mn/SBA-15.

Key words: short mesochannel, copper, manganese, zirconium, cerium, SBA-15 zeolite, toluene, catalytic combustion