Preparation, characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite

ZENG Xiang; YUAN Xia; WU Jian; LUO He’an

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Preparation, characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite

更新时间：2025-12-10

- Preparation, characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite
- CIESC Journal Issue 6, Pages: 1463-1468(2010)
- 作者机构：
  
  湘潭大学化工学院
- 作者简介：
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- Online First：05 June 2010，
  
  Published：05 June 2010
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ZENG Xiang, YUAN Xia, WU Jian, et al. Preparation, characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite[J]. CIESC Journal, 2010, (6): 1463-1468.
DOI：

ZENG Xiang, YUAN Xia, WU Jian, et al. Preparation, characterization and catalytic behavior of phosphotungstic acid encapsulated in Y zeolite[J]. CIESC Journal, 2010, (6): 1463-1468. DOI：

摘要

采用“瓶中造船”方法制备了超稳Y沸石封装的磷钨酸催化剂PW-USY，并用FT-IR、UV-vis，N2吸附，NH3-TPD等手段对其进行了表征，并与浸渍法制备的负载催化剂PW/USY进行了比较，结果表明在超稳Y沸石超笼中成功合成了具有Keggin结构的12-磷钨酸。在以H2O2为氧源的环己酮氨肟化反应中，封装型磷钨酸催化剂表现出较好的催化活性，选择性较纯磷钨酸有所降低。封装型磷钨酸催化剂重复使用5次后，催化性能没有明显的下降，较负载型磷钨酸而言能较好地解决活性组分流失的问题，显示出潜在的应用前景。

Abstract

Phosphotungstic acid encapsulated in ultra stable Y zeolite (PW-USY) was prepared by the “ship in the bottle” synthesis.The obtained catalysts were characterized with FT-IR

ICP

UV-vis

N2-adsorption

XRD and SEM techniques.Compared with immobilized catalysts (PW/USY)

it was demonstrated that encapsulation of Keggin-type 12-phosphotungstic acid in the supercage of USY zeolite was realized.In the ammoximation of cyclohexanone system with H2O2 as oxygen source

PW-USY showed better catalytic activity than PW/USY.Moreover

the catalytic performance of PW-USY did not drop apparently after using five times

and could solve the leakage problem of active component in polar reaction media better than immobilized catalysts (PW/USY).

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