Acta Chim. Sinica ›› 2016, Vol. 74 ›› Issue (7): 603-611.DOI: 10.6023/A16030117 Previous Articles     Next Articles



袁珮a, 陈建a, 潘登b, 鲍晓军b   

  1. a. 中国石油大学北京化学工程学院 重质油国家重点实验室 北京 102249;
    b. 中国石油大学北京化学工程学院 CNPC催化重点实验室 北京 102249
  • 投稿日期:2016-03-04 发布日期:2016-06-07
  • 通讯作者: 袁珮
  • 基金资助:


Adsorption and Reaction Kinetic Studies of the Heterogeneous Catalytic Hydrogenation for Polystyrene

Yuan Peia, Chen Jiana, Pan Dengb, Bao Xiaojunb   

  1. a. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249;
    b. The Key Laboratory of Catalysis, China University of Petroleum, Beijing 102249
  • Received:2016-03-04 Published:2016-06-07
  • Supported by:

    Project supported by The National Natural Science Foundation of China (Grant 21576290, 21106182) and China National Petroleum Corp. (2012B-2805).

We applied silica hollow microspheres with through holes in the shell as supports to prepare Pd-based supported catalyst (Pd/SHMs) for heterogeneous catalytic hydrogenation of polystyrene (PS) and also systematically studied the adsorption and reaction behavior of PS molecules over Pd/SHMs. The dynamic adsorption and reaction models of PS molecules under different temperatures have been established and the partially hydrogenated products were also comprehensively analyzed. The result shows that both the adsorption capacity and saturation time are increased as the temperature increasing and this hydrogenation reaction is confirmed to be a first-order reaction and the activation energy is calculated to be 58.3 kJ·mol-1. After separating and purifying three samples with different hydrogenation degrees, we further analyzed the partially hydrogenated products and the results show that they are all actually comprised of two kinds of substances with different properties, one with high hydrogenation conversion rate (ca. 85%) and the other with low hydrogenation ratio (ca. 25%). It is proved that PS heterogeneous hydrogenation process exists secondary adsorption and competitive adsorption phenomenon, and obeys the Blocky mechanism. This work lays the foundation for PS adsorption and hydrogenation reaction and is also favorable for the understanding of the adsorption and catalytic process for other unsaturated polymers over heterogeneous catalysts.

Key words: hydrogenation, adsorption, kinetics, supported catalyst, unsaturated polymer