Effect of zinc additive on n-hexane aromatization over WC/HZSM-5 catalysts

SHI Meiqin; ZHENG Huixin; WEI Aiping; MA Chun'an

doi:10.11949/j.issn.0438-1157.20141298

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Effect of zinc additive on n-hexane aromatization over WC/HZSM-5 catalysts

更新时间：2025-12-10

- Effect of zinc additive on n-hexane aromatization over WC/HZSM-5 catalysts
- CIESC Journal Issue 2, Pages: 553-560(2015)
- 作者机构：
  
  浙江工业大学化学工程与材料学院, 绿色化学合成技术国家重点实验室培育基地, 科技部能源材料及应用国际科技合作基地,浙江,杭州,310032
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141298
  CLC： 643.36
- Online First：05 February 2015，
  
  Published：05 February 2015
- 稿件说明：
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SHI Meiqin, ZHENG Huixin, WEI Aiping, et al. Effect of zinc additive on n-hexane aromatization over WC/HZSM-5 catalysts[J]. CIESC Journal, 2015, (2): 553-560.
DOI：

SHI Meiqin, ZHENG Huixin, WEI Aiping, et al. Effect of zinc additive on n-hexane aromatization over WC/HZSM-5 catalysts[J]. CIESC Journal, 2015, (2): 553-560. DOI： 10.11949/j.issn.0438-1157.20141298.

摘要

以WC/HZSM-5为前驱体制备了一系列不同Zn含量的Zn-WC/HZSM-5催化剂

采用X射线衍射、扫描电子显微镜、N2物理吸附、傅里叶变换红外光谱和热重分析等手段对Zn-WC/HZSM-5的晶相、形貌、比表面积、酸性质、积炭量等进行了表征

并研究了正己烷芳构化的催化性能

探究了助剂Zn与WC在反应过程中的作用。结果表明

Zn的引入可以提高催化剂的芳烃选择性和芳烃收率。当Zn负载量为1.5%(质量分数)时

所制备的Zn-WC/HZSM-5催化剂芳构化活性最佳

芳烃收率达到36.18%。Zn的引入不仅改变了WC/HZSM-5表面的酸性分布

而且可以减少WC/HZSM-5催化剂的积炭量。

Abstract

A series of Zn-WC/HZSM-5 catalysts with different amounts of Zn additive were prepared based on the precursor WC/HZSM-5. The samples were characterized with X-ray diffraction

scanning electron microscopy

N2 adsorption-desorption

Fourier transform infrared spectroscopy and thermogravimetric analyzer. Aromatization of n-hexane was evaluated over the Zn-WC/HZSM-5 catalysts in a fixed-bed micro reactor. The role of metal components and the reaction mechanism were studied. Both aromatic selectivity and yield increased with Zn-WC/HZSM-5. Yield increased to 36.18% when the Zn-WC/HZSM-5 displayed the best activity with the concentration of Zn 1.5% (mass). Introduction of Zn into WC/HZSM-5 led to redistribution of acid sites on the surface of catalyst and also caused decrease of coke deposition.

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