ACo2O4/HZSM-5 催化剂上N2O 的直接分解

引用本文: 王虹, 王军利, 李翠清, 宋永吉, 迟姚玲, 王焘. ACo₂O₄/HZSM-5 催化剂上N₂O 的直接分解[J]. 物理化学学报, 2010, 26(10): 2739-2744. doi: 10.3866/PKU.WHXB20100928 shu

Citation: WANG Hong, WANG Jun-Li, LI Cui-Qing, SONG Yong-Ji, CHI Yao-Ling, WANG Tao. Decomposition of N₂O on ACo₂O₄/HZSM-5 Catalysts[J]. Acta Physico-Chimica Sinica, 2010, 26(10): 2739-2744. doi: 10.3866/PKU.WHXB20100928 shu

ACo₂O₄/HZSM-5 催化剂上N₂O 的直接分解

基金项目:
北京市教委科技计划(KM200910017002) (KM200910017002)

北京市属高等学校人才强教计划(PHR200907129)资助项目 (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

English

Decomposition of N₂O on ACo₂O₄/HZSM-5 Catalysts

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 Date: 13 April 2010
Available Online: 27 September 2010
Fund Project:
北京市教委科技计划(KM200910017002)

北京市属高等学校人才强教计划(PHR200907129)资助项目

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 od acidity. All these factors are useful in improving the performance of these catalysts.

Key words:

N₂O
/ Spinel
/ Decompose
/ HZSM-5

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

ACo₂O₄/HZSM-5 催化剂上N₂O 的直接分解

English

Decomposition of N₂O on ACo₂O₄/HZSM-5 Catalysts

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