Alkali-treatment of ZSM-5 zeolites with different SiO2/Al2O3 ratios and light olefin production by heavy oil cracking
Alkali-treatment of ZSM-5 zeolites with different SiO2/Al2O3 ratios and light olefin production by heavy oil cracking
复制标题
不同SiO2/Al2O3比ZSM-5沸石碱处理及重油裂解制轻烯烃
DOI：
10.1016/j.fuproc.2010.10.003
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发表时间：
2011-03
影响因子：
7.5
通讯作者：
Shen, Baojian
中科院分区：
文献类型：
--
作者：
Zhao Liang;Gao, Jinsen;Xu, Chunming;Shen, Baojian
用0.2M NaOH溶液在363 K下对四种不同SiO_2/Al_2O_3比的ZSM-5沸石进行碱处理300 min。比较了碱处理前后沸石的组成、形貌、孔径和分布的变化。所观察到的变化在很大程度上受合成沸石的SiO2/Al 2 O3比的影响。提出了碱处理脱硅的可能机理。以重油为原料，沸石的SiO2/Al 2 O3比对低碳烯烃的产率有影响。与未处理的沸石或工业催化剂CEP-1相比，碱处理的ZSM-5沸石产生更高的轻质烯烃产率。认为碱处理可在沸石分子筛中引入介孔，提高其催化裂化性能。SiO2/Al 2 O3比为50的ZSM-5分子筛由于其优化的分级孔结构也表现出对低碳烯烃的上级选择性。
Four kinds of ZSM-5 zeolites with different SiO2/Al2O3ratios are alkali-treated in 0.2M NaOH solution for 300min at 363K. Changes to the compositions, morphologies, pore sizes, and distributions of the zeolites are compared before and after alkali-treatment. The changes observed are largely influenced by the SiO2/Al2O3ratios with which the zeolites are synthesized. A possible mechanism of desilication during alkali-treatment is proposed. The SiO2/Al2O3ratio of zeolites is found to influence the yield of light olefins that use heavy oil as feedstock. Alkali-treated ZSM-5 zeolites produce higher yields of light olefins compared to either untreated zeolites or the industry catalyst CEP-1. It is believed that alkali-treatment introduces mesopores to the zeolites and improves their catalytic cracking ability. ZSM-5 zeolites with SiO2/Al2O3ratios of 50 also present superior selectivity toward light olefins because of their optimized hierarchical pores.
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影响因子：
5.2
作者：
Suzuki, T;Okuhara, T
通讯作者：
Okuhara, T
影响因子：
5.5
作者：
A. Corma;F. Melo;L. Sauvanaud;F. Ortega
通讯作者：
A. Corma;F. Melo;L. Sauvanaud;F. Ortega
影响因子：
7.3
作者：
Liang Zhao;B. Shen;Jinsen Gao;Chunming Xu
通讯作者：
Liang Zhao;B. Shen;Jinsen Gao;Chunming Xu
影响因子：
15
作者：
Groen, Johan C.;Zhu, Weidong;Perez-Ramirez, Javier
通讯作者：
Perez-Ramirez, Javier
影响因子：
5.5
作者：
Ogura, M;Shinomiya, SY;Matsukata, M
通讯作者：
Matsukata, M