石油化工高等学校学报

石油化工高等学校学报 ›› 2012, Vol. 25 ›› Issue (1): 13-17.DOI: 10.3969/j.issn.1006-396X.2012.01.003

• 石油化工 • 上一篇    下一篇

L沸石的合成条件与反应性能研究

卢亚昆1,万海2,任创1,宋丽娟1* ,孙兆林1   

  1. 1.辽宁石油化工大学辽宁石油化工重点实验室;2.中国石油大学化学化工学院
  • 收稿日期:2011-11-15 修回日期:1900-01-01 出版日期:2012-02-25 发布日期:2012-02-25
  • 作者简介:卢亚昆（１９８５－），男，河北省邢台市，在读硕士
  • 基金资助:
    国家自然基金资助项目（２１０７６１００）

  1. 1. Liaoning Key Laboratory of Petrochemical Engineering, Liaoning Shihua University, Fushun Liaoning 113001, P.R.China; 
    2. College of Chemistry & Chemical Engineering, China University of Petroleum, Dongying Shandong 257061, P.R.China
  • Received:2011-11-15 Revised:1900-01-01 Published:2012-02-25 Online:2012-02-25

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摘要： 采用水热合成法成功合成了Ｌ沸石分子筛。采用Ｘ射线衍射仪、红外光谱仪等对其结构进行了表征，并在固定床装置上评价了其芳构化、异构化性能。结果表明，在Ｌ沸石合成初始凝胶组成为：ｎ（Ｋ２Ｏ）／ｎ（Ｎａ２Ｏ）／ｎ（Ａｌ２Ｏ３）／ｎ（ＳｉＯ２）／ｎ（Ｈ２Ｏ）＝５．４∶５．７∶１∶３０∶５００时，最佳合成条件为：晶化温度１７０℃，晶化时间２４ｈ，陈化温度２５℃，陈化时间２ｈ，ｐＨ为９～１０；该条件下制备的Ｌ沸石结晶度更高、骨架结构完整，并且在反应温度为４６０℃ 时液体收率达６０．５％，异戊烷选择性３５％。

关键词: Ｌ沸石 , 水热合成 , 晶化 , 表征 , 异构化

Abstract: The zeolite L was prepared with hydrothermal synthesis method. Synthesized zeolite L samples were characterized by XRD and IR, the performance of L catalysts for the aromatization and isomerization were assessed in a fixed-bed micro-reactor by using n-pentane as the feedstock. The results indicate that, at the condition of the optimal molar composition of the precursor gel is n(K2O)/n(Na2O)/n(Al2O3)/n(SiO2)/n(H2O)=5.4∶5.7∶1∶30∶500, the optimum conditions to get phase pure zeolite L with good crystallinity were found to be the pH value of 9～10, the crystallization temperature of 170 ℃, the crystallization time of 24 h, the aging temperature of 25 ℃ and the aging time of 2 h. The results show that higher aromatization and isomerization catalytic activity and the yield of liquid product is 60.5%, the selectivity of isopentane is 35%.

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引用本文

卢亚昆,万海,任创,宋丽娟,孙兆林. L沸石的合成条件与反应性能研究[J]. 石油化工高等学校学报, 2012, 25(1): 13-17.

LU Ya-kun,WAN Hai,REN Chuang,SONG Li-juan,et al. [J]. Journal of Petrochemical Universities, 2012, 25(1): 13-17.

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