硅源对高岭土合成ZSM-5分子筛的影响
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TQ072

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国家自然科学基金项目


Influence of Silica Source on ZSM-5 Molecular Sieves Synthesized by Kaolin
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    本文以煤系高岭土为原料,水玻璃、气相SiO2、正硅酸四乙酯和硅酸为硅源,氢氧化钠为矿化剂,四丙基氢氧化铵为模板剂合成 ZSM-5分子筛。随后,在氯化铵氛围下离子交换合成HZSM-5分子筛。利用 XRD、SEM、FTIR、NH3-TPD、BET对HZSM-5进行了表征。最后,利用甲醇制汽油反应(MTG)测试HZSM-5的催化性能。结果表明,以硅酸合成的HZSM-5分子筛催化效果优异,在MTG反应43 h后开始失活,高碳烃类产物的选择性38.99%。

    Abstract:

    In this paper, the ZSM-5 zeolite was synthesized using coal-series kaolin as material, sodium silicate, fumed silica, silicon acetate and silicic acid as silicon sources, sodium hydroxide as mineralizer and tetrapropylammonium hydroxide as template. Then, HZSM-5 was synthesized by exchanging ion in ammonium chloride. The HZSM-5 samples were characterized by XRD, SEM,FTIR, NH3-TPD and BET. Finally, the catalytic performance of HZSM-5 samples were evaluated by Methanol to Gasoline(MTG) reaction. The results indicate that the HZSM-5 molecular sieve synthesized from silicic acid has an excellent catalytic performance, starting to deactivate at 43 h after MTG reaction, and the selectivity of higher hydrocarbons products was 38.99%.

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马文,徐森元,董正鑫,牛明爽,马剑君,虞乐建,蒋荣立.硅源对高岭土合成ZSM-5分子筛的影响[J].精细化工,2019,36(5):

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  • 收稿日期:2018-09-12
  • 最后修改日期:2018-12-06
  • 录用日期:2019-01-04
  • 在线发布日期: 2019-03-28
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