Preparation of nano ZSM-5 with hydrophobic surfaces and application to catalytic cracking of hydrocarbon fuels(亲油性纳米ZSM-5分子筛的制备及其对碳氢燃料的催化性能)
采用不同链长的有机硅烷作为表面修饰剂,在正庚烷/正丁醇中利用溶剂热合成法制备得到亲油性纳米ZSM-5分子筛.通过有机硅烷与氧化物晶种表面的羟基作用,其长链化学键合到晶种表面,形成保护层,既抑制了氧化物颗粒间的团聚,又控制了纳米ZSM-5的粒径.所制备的纳米ZSM-5平均粒径为20~70 nm,且粒径随着有机硅烷碳链长度的降低而逐渐减小.添加一定量的该纳米ZSM-5到碳氢燃料模型化合物正十二烷中,在管式反应器中(550 ℃,4 MPa)考察催化裂解行为,结果表明该亲油性纳米ZSM-5分子筛能有效催化正十二烷裂解,其裂解转化率相对于热裂解明显提高,且转化率的提高随着有机硅烷碳链长度的降低而逐渐增大...
Main Authors: | LIUJia-zhen(刘家珍), XULi(许莉), FANGWen-jun(方文军), GUOYong-sheng(郭永胜), SHANGZhong-jin(尚忠进) |
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Format: | Article |
Language: | zho |
Published: |
Zhejiang University Press
2013-11-01
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Series: | Zhejiang Daxue xuebao. Lixue ban |
Subjects: | |
Online Access: | https://doi.org/10.3785/j.issn.1008-9497.2013.06.010 |
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