MoP催化剂上乙炔选择性催化加氢-催化学报.PDF

2011 Chinese Journal of Catalysis Vol. 32 No. 1 文章编号: 0253-9837(2011)01-0027-04 国际版DOI : 10.1016/S1872-2067(10)60155-6 研究快讯: 27~30 MoP 催化剂上乙炔选择性催化加氢 1 2 1 1 1 周桂林 , 王普光 , 蒋宗轩 , 应品良 , 李 灿 1 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连 116023 2 陕西延长石油 (集团) 有限责任公司, 陕西西安 710075 摘要：通过高温还原法制得磷化钼 (MoP) 催化剂, 采用 X 射线衍射和原位 X 射线光电子能谱对其进行了表征, 并考察其催化乙 炔选择性加氢性能. 结果表明, 在 650 ºC 经 H2 还原制得的催化剂中形成了大量的低价态物种 MoP, 但仍含有大量的高价态 Mo 和 P 物种, 该催化剂具有加氢活性中心和缺电子中心双重功能, 在乙炔选择性加氢反应中, 乙炔转化率超过 99% 时, 乙烯选择性仍 能保持在 73% 以上. 关键词：磷化钼; 乙炔; 选择性加氢; 乙烯 中图分类号：O643 文献标识码：A Selective Hydrogenation of Acetylene over a MoP Catalyst 1 2 1 1 1,∗ ZHOU Guilin , WANG Puguang , JIANG Zongxuan , YING Pinliang , LI Can 1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China 2Shannxi Yanchang Petroleum Co., Ltd., Xi’an 710075, Shannxi, China Abstract: A MoP catalyst was prepared by high temperature hydrogen reduction. Its properties were investigated by X-ray diffraction and in-situ X-ray photoelectron spectroscopy. It was used for the selective catalytic hydrogenation of acetylene. The results indicated that MoP is formed by hydrogen reduction at 650 °C. The prepared MoP catalyst contained high valence molybdenum and phosphorus species. The cata- lyst is a bifunctional catalyst, which includes a hydrogenation center and an electron-deficient center. Ethylene selectivit