Influence of ZSM-5 zeolite on the pyrolytic intermediates from the co-pyrolysis of pubescens and LDPE

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• 作者：Wenwu Liu ; Changwei Hu ; Yu Yang ; Dongmei Tong ; Guiying Li ; Liangfang Zhu
• 关键词：Intermediates ; Interactions ; Aromatization ; Alkanisation
• 刊名：Energy Conversion and Management
• 出版年：2010
• 出版时间：May 2010
• 年：2010
• 卷：51
• 期：5
• 页码：1025-1032
• 全文大小：358 K

文摘

The catalytic reforming of the pyrolytic intermediates from the co-pyrolysis of pubescens and LDPE over the parent and desilicated zeolite ZSM-5 (DeZSM-5) was investigated. The results showed that the parent HZSM-5 exhibited high aromatization activity in the co-pyrolysis, whereas DeZSM-5 exhibited high alkanisation activity. On the other hand, the total relative content of phenolic compounds in aqua obtained by co-pyrolysis catalyzed by both parent HZSM-5 and DeZSM-5 was rather high (60–65 % ) compared to the thermal co-pyrolysis (26.94 % ). From the analysis of NH₃–TPD for ZSM-5, it might be proposed that the aromatization was favored mainly by strong acid sites and the alkanisation was favored chiefly by weak acid sites in catalyst ZSM-5. In addition, the formation of phenolic compounds was mainly related to the interactions between the intermediates from the co-pyrolysis over ZSM-5.