聚苯乙烯的催化裂解研究  

Study on the catalytic pyrolysis of polystyrene

作　　者：刘静[1] 杨宇[1] 周晓东[1] 胡常伟[1] 

机构地区：[1]绿色化学与技术教育部重点实验室,四川大学化学学院,四川成都610064

出　　处：《化学研究与应用》2009年第12期1648-1652,共5页Chemical Research and Application

基　　金：国家自然科学基金(20576084)资助项目;教育部博士点基金(20050610013)资助项目;高等学校优秀青年教师教学科研奖励计划(2002)资助项目;四川省应用基础基金(105JY029-025-2)资助项目;四川大学创新基金资助项目

摘　　要：Fe/Al2O3,Co/Al2O3 and Ni/Al2O3 catalysts were prepared by impregnation method.The catalytic pyrolysis catalyzed by Al2O3 and the above mentioned catalysts as well as the direct pyrolysis of polystyrene(PS)were investigated comparably.Comparing with direct pyrolysis of PS,a high conversion of PS and a high selectivity of styrene monomer(61.5%)could be obtained over Co/Al2O3,furthermore reduced carbon deposition was observed.The selectivity of monomer increased over Fe/Al2O3 and Ni/Al2O3 while the oil yield decreased.The loading of transition metal enhanced the basicity of Al2O3 support,which led to increase of β-chain-breaking and resulted in higher selectivity of styrene monomer(about 60 %)over Fe/Al2O3,Co/Al2O3 and Ni/Al2O3 than that over Al2O3.The three catalysts prevented effectively the cross-linking reaction of the newly formed monomers in PS pyrolysis.Fe/Al2O3, Co/Al2O3and Ni/Al2O3 catalysts were prepared by impregnation method. The catalytic pyrolysis catalyzed by Al2O3 and the above mentioned catalysts as well as the direct pyrolysis of polystyrene （PS）were investigated comparably. Comparing with direct pyrolysis of PS, a high conversion of PS and a high selectivity of styrene monomer （61.5%）could he obtained over Co/ Al2O3 ,furthermore reduced carbon deposition was observed. The selectivity of monomer increased over Fe/Al2O3 and Ni/Al2O3 while the oil yield decreased. The loading of transition metal enhanced the basicity of Al2O3 support, which led to increase of β-chainbreaking and resulted in higher selectivity of styrene monomer （about 60 % ）over Fe/Al2O3, Co/Al2O3 and Ni/Al2O3 than that over Al2O3. The three catalysts prevented effectively the cross-linking reaction of the newly formed monomers in PS pyrolysis.

关 键 词：聚苯乙烯 催化裂解 苯乙烯单体 再聚 

分 类 号：O632.13[理学—高分子化学]