VO<sub>x</sub>/SiO<sub>2</sub>催化剂上正丁烷氧化脱氢

陆江银; 杨朋坤

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VO_x/SiO₂催化剂上正丁烷氧化脱氢

更新时间：2026-01-21

- VO_x/SiO₂催化剂上正丁烷氧化脱氢
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 28, Issue 1, Pages: 76-82(2011)
- 作者机构：
  
  新疆大学石油天然气精细化工教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ203.2
- Published：2011
- 稿件说明：
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[1]陆江银,杨朋坤.VO_x/SiO_2催化剂上正丁烷氧化脱氢[J].新疆大学学报(自然科学版),2011,28(01):76-82.

陆江银, 杨朋坤. VO_x/SiO₂催化剂上正丁烷氧化脱氢[J]. Journal of Xinjiang University (Natural Science Edition in Chinese and English), 2011, 28(1): 76-82.
[1]陆江银,杨朋坤.VO_x/SiO_2催化剂上正丁烷氧化脱氢[J].新疆大学学报(自然科学版),2011,28(01):76-82. DOI：

陆江银, 杨朋坤. VO_x/SiO₂催化剂上正丁烷氧化脱氢[J]. Journal of Xinjiang University (Natural Science Edition in Chinese and English), 2011, 28(1): 76-82. DOI：

摘要

采用浸渍法制备了系列VOx/SiO2催化剂

研究了VOx负载量、反应温度、n-butane/O2

空速及反应时间对反应的影响.在反应温度为550℃

VOx负载为3%

n-butane/O2/N2=4/4/42(摩尔比)

原料气重时空速为1.5×104mol.h-1.(g.cat)-1时最佳

此时正丁烷转化率和C4烯烃收率分别为40.1%和18.8%

并通过BET、XRD、NH3-TPD、H2-TPR、FT-IR对催化剂进行了表征

XRD

H2-TPR表征结果表明

在低负载量下

VOx能在载体上分散

高负载量时V2O5晶体出现.NH3-TPD表征结果说明

催化剂表面的酸性以弱酸位为主

催化剂活性钒物种表面的酸性增加会提高催化剂的活性

同时也会加剧正丁烷深度氧化反应的程度.

Abstract

A series of VOx/SiO2 catalyst are prepared by an impregnation method.The e?ect of loading VOx

react temperature

n-butane/O2

space velocity and the react time are studied.When the react temperature at 550℃

the loading VOxis 3%

n-butane/O2/N2=4/4/42

the feed weight space velocity is 1.5×104mol.h-1.(g cat)-1

the n-butane conversion and C4 alkene yield are 40.1% and 18.8% respectively.These catalysts were thoroughly characterized using BET

XRD

NH3-TPD

H2-TPR

and FT-IR.The XRD and H2-TPR results show that VOx on support can be better disperse with low content

the V2O5 crystal appears at the high loading and easily causes profound oxidation.The NH3-TPD results show that the exterior acidity of catalyst mostly is the weak acid

and the acid amount enhance the catalyst active

vanadium on the surface of the catalysts can improve the catalyst activity

and also cause n-butane unduly oxidation.

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references

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VOx/SiO2催化剂上正丁烷氧化脱氢

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摘要

Abstract

关键词

Keywords

references

VO_x/SiO₂催化剂上正丁烷氧化脱氢