物理化学学报 >> 2010, Vol. 26 >> Issue (10): 2739-2744.doi: 10.3866/PKU.WHXB20100928

催化和表面结构 上一篇    下一篇

ACo2O4/HZSM-5 催化剂上N2O 的直接分解

王虹, 王军利, 李翠清, 宋永吉, 迟姚玲, 王焘   

  1. 1. 北京石油化工学院化学工程学院, 北京 102617;
    2. 湖南长岭石化科技开发有限公司, 湖南长岭 414000
  • 收稿日期:2010-04-13 修回日期:2010-05-24 发布日期:2010-09-27
  • 通讯作者: 李翠清, 王虹 E-mail:licuiqing@bipt.edu.cn, wanghong@bipt.edu.cn
  • 基金资助:

    北京市教委科技计划(KM200910017002)和北京市属高等学校人才强教计划(PHR200907129)资助项目

Decomposition of N2O on ACo2O4/HZSM-5 Catalysts

WANG Hong, WANG Jun-Li, LI Cui-Qing, SONG Yong-Ji, CHI Yao-Ling, WANG Tao   

  1. 1. Department of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, P. R. China;
    2. Hunan Changling Petrochemical Scientific and Technical Developing Company Limited, Changling 414000, Hunan Province, P. R. China
  • Received:2010-04-13 Revised:2010-05-24 Published:2010-09-27
  • Contact: LI Cui-Qing, WANG Hong E-mail:licuiqing@bipt.edu.cn, wanghong@bipt.edu.cn
  • Supported by:

    The project was supported by the Science and Technology Development of Bejing Education Committee, China (KM200910017002) and Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality, China (PHR200907129).

摘要:

分别采用柠檬酸络合燃烧法和低温络合浸渍法制备尖晶石型复合金属氧化物催化剂ACo2O4(A=Mg, Ni, Zn) 和分子筛负载尖晶石型复合金属氧化物催化剂ACo2O4/HZSM-5(A=Mg, Fe, Ni, Cu, Zn, Zr, La). 采用X 射线衍射(XRD) 、氨程序升温脱附(NH3-TPD) 、扫描电子显微镜(SEM) 和X 射线能谱(EDS) 等手段对催化剂进行表征, 并在固定床微型反应器中评价其催化分解N2O 活性. 实验结果表明,A 位离子种类影响ACo2O4/HZSM-5 催化剂活性, 以Ni、Fe、Zr 或La 为A 位离子时, 催化剂的活性较好,N2O 分解温度低. ACo2O4/HZSM-5 催化剂的活性高于ACo2O4 尖晶石型复合氧化物, 一方面是ACo2O4 在分子筛HZSM-5 载体上高度分散, 使其以超细颗粒形态存在, 另一方面ACo2O4/HZSM-5 催化剂具有适宜的酸性, 可提高催化剂的活性.

关键词: N2O, 尖晶石, 分解, HZSM -5

Abstract:

ACo2O4(A=Mg, Ni, Zn)andACo2O4/HZSM-5 (A=Mg, Fe, Ni, Cu, Zn, Zr, La) catalysts were synthesized by the citric acid -ligated combustion method and by low -temperature complex impregnation, respectively. The catalysts were characterized by X-ray diffraction (XRD), ammonia temperature -programmed desorption (NH3-TPD), scanning electron microscopy (SEM), and energy dispersive X-ray microanalysis (EDS). The performance of the catalysts was evaluated with micro fixed bed reactor. The results showed that the catalytic activity was affected by the A-site ion, and when theA -site ion was Ni, Fe, Zr, or La, the catalysts had better catalytic activity and the temperature of N2O decomposition was lower. Compared with ACo2O4, the ACo2O4/HZSM -5 catalyst had better catalytic activity. ACo2O4 was present as ultrafine particles on the HZSM-5 zeolite and the ACo2O4/HZSM -5 catalyst had good acidity. All these factors are useful in improving the performance of these catalysts.

Key words: N2O, Spinel, Decompose, HZSM-5

MSC2000: 

  • O643