SAPO-18分子筛的快速合成及其甲醇制烯烃催化性能

doi:10.16085/j.issn.1000-6613.2017-1446

化工进展 ›› 2018, Vol. 37 ›› Issue (05): 1815-1822.DOI: 10.16085/j.issn.1000-6613.2017-1446

SAPO-18分子筛的快速合成及其甲醇制烯烃催化性能

张岩¹, 李渊¹, 赵立国², 谭小耀¹, 覃环¹, 王秋月¹, 黄从付¹

1 天津工业大学环境与化学工程学院, 天津 300387;
2 唐山市天然气有限公司, 河北唐山 063000

收稿日期:2017-07-13 修回日期:2017-09-26 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 李渊,副教授,主要从事甲醇转化和脱硝相关催化剂及工艺过程研究。
作者简介:张岩(1992-),男,硕士研究生。
基金资助:
天津市科技特派员项目（14JCTPJC00559）。

Rapid synthesis of SAPO-18 molecular sieve and its MTO performance

ZHANG Yan¹, LI Yuan¹, ZHAO Liguo², TAN Xiaoyao¹, QIN Huan¹, WANG Qiuyue¹, HUANG Congfu¹

1 School of Environmental and Chemical Engineering of Tianjin Polytechnic University, Tianjin 300387, China;
2 Tangshan Natural Gas Company Limited, Tangshan 063000, Hebei, China

Received:2017-07-13 Revised:2017-09-26 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 在水热合成SAPO-18分子筛的过程中，通过在合成凝胶中加入过硫酸钾来加速SAPO-18分子筛的结晶。借助ESR、XRD、SEM、FTIR和NH3-TPD对分子筛的结晶过程和所制备的分子筛样品进行表征，并通过固定床反应器评价所制备的SAPO-18样品对甲醇转化制备低碳烯烃（MTO）反应的催化性能。考察了加入过硫酸钾的量对SAPO-18分子筛样品及其MTO催化性能的影响。实验结果表明，合成凝胶中适量过硫酸钾的加入，使得体系中羟基自由基（·OH）数量增多，SAPO-18分子筛的结晶度提高，形貌变好。此外，通过评价SAPO-18分子筛催化MTO过程发现，合成凝胶中加入过硫酸钾后寿命显著增长。

关键词: 分子筛, 合成, 过硫酸钾, 羟基自由基, 结晶, 催化

Abstract: In the hydrothermal synthesis of SAPO-18 molecular sieves,the crystallization of SAPO-18 molecular sieves could be accelerated by the addition of potassium persulfate in the synthetic gel. The properties of the molecular sieve samples were characterized by ESR,XRD,SEM,FTIR and NH₃^- TPD,and the catalytic performance of the prepared SAPO-18 for the conversion of methanol to olefins were investigated in a fixed bed reactor. The effects of the amount of potassium persulfate on the properties of the SAPO-18 molecular sieve samples and their MTO catalytic performance were investigated. The results showed that the amount of hydroxyl radicals (·OH) and the crystallinity of SAPO-18 molecular sieves were increased,and the morphologies of SAPO-18 molecular sieves were improved by adding appropriate amount of potassium persulfate in the synthetic gel. In addition,through evaluating the MTO process catalyzed by SAPO-18 molecular sieves,we found that the life of SAPO-18 molecular sieves were also increased with the presence of potassium persulfate in the synthetic gel.

Key words: molecular sieves, synthesis, potassium persulfate, hydroxyl radicals, crystallization, catalysis

中图分类号:

O643.36

张岩, 李渊, 赵立国, 谭小耀, 覃环, 王秋月, 黄从付. SAPO-18分子筛的快速合成及其甲醇制烯烃催化性能[J]. 化工进展, 2018, 37(05): 1815-1822.

ZHANG Yan, LI Yuan, ZHAO Liguo, TAN Xiaoyao, QIN Huan, WANG Qiuyue, HUANG Congfu. Rapid synthesis of SAPO-18 molecular sieve and its MTO performance[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1815-1822.

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SAPO-18分子筛的快速合成及其甲醇制烯烃催化性能

Rapid synthesis of SAPO-18 molecular sieve and its MTO performance

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