Hβ -Zeolite Cataly zed Deg radation of Polysty rene and Polyethylene

Journal of Liaoning Petrochemical University ›› 2005, Vol. 25 ›› Issue (3): 5-7.

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Hβ -Zeolite Cataly zed Deg radation of Polysty rene and Polyethylene

1 .School of Petrochemical Technology , Liaoning University of Petroleum & Chemical Technology , Fushun Liaoning 113001 ,P .R .China ;
2 .PetroChina Liaoning Marketing Company , Shenyang Liaoning 110031, P .R .China

Received:2004-09-16 Published:2005-03-25 Online:2005-03-25

Hβ 沸石催化降解聚苯乙烯和聚乙烯

陈　平¹ , 孙永康²

1.辽宁石油化工大学石油化工学院, 辽宁抚顺113001;
2.中国石油辽宁销售分公司, 辽宁沈阳110031

作者简介:陈平(1963 -), 女, 辽宁抚顺市, 副教授, 硕士。

Abstract

Abstract:

Pore structure of Hβ -zeolite was changed by hydrothermal and acid treatment .The surface areas, total volumes and average diameters were broadened .The pore volume produced by treatment w as 38 .7% of total pore volume .By modifying the pore size w as broadened and produced more pore, but the acid amount and acid strength decreased.Thermogravimetric analyses w ere used to investigate the activity of Hβ -zeolite catalysts in the degradation of polystyrene and poly ethylene .The results show that modified Hβ -zeolite could reduce degradation temperature of polyethylene .The acidity of catalys exhibits much influecnce on degradation temperature and coking .The increase of catalyst acidity leads to a significantly decrease in degradation temperature , but a remarkable increase in coke yield , which is 6 times of thermal degradation .The effect of catalyst o n degradation temperature for polystyrene is slight , and mainly depends on pore structure of catalyst .Coking is simlar to that of polyethylene , that is , coking increases with the increasing catalyst acidity .

Key words: 　H&beta, -Zeo lite , 　Catalyst , 　Polysty rene , 　Polyethy lene , 　Catalyzed degradation

摘要： 　将Hβ 沸石进行水蒸气处理、酸处理改性后, 其比表面、总孔容及平均直径均增大, 二次孔孔体积占总体积的38 .7 %, 说明改性后的沸石具有更通畅的孔道和较多的二次孔, 总酸量减少, 酸强度分布降低。热重分析研究了处理前后的Hβ 沸石作催化剂对聚苯乙烯及聚乙烯催化降解的作用。结果表明, Hβ 沸石能显著地降低聚乙烯的热降解温度, 催化剂的酸量对聚乙烯降解温度及积炭生成有很大的影响。催化剂酸量增加, 聚乙烯的降解温度显著下降, 同时积炭的含量却明显增加, 是热降解产生积碳的6 倍;而催化剂对聚苯乙烯的热降解温度影响不大, 且主要取决于孔道结构。但积碳的生成与聚乙烯类似, 都是随着催化剂的酸量增加而大幅度增加。

关键词: H&beta, 沸石, 　催化剂, 　聚苯乙烯, 　聚乙烯, 　催化降解

CHEN Ping,SUN Yong--kang. Hβ -Zeolite Cataly zed Deg radation of Polysty rene and Polyethylene[J]. Journal of Liaoning Petrochemical University, 2005, 25(3): 5-7.

陈　平, 孙永康. Hβ 沸石催化降解聚苯乙烯和聚乙烯[J]. 辽宁石油化工大学学报, 2005, 25(3): 5-7.

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Hβ -Zeolite Cataly zed Deg radation of Polysty rene and Polyethylene

Hβ 沸石催化降解聚苯乙烯和聚乙烯

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