Promotive effect of potassium on Pt/γ-Al<sub>2</sub>O<sub>3</sub> catalyst for preparing o-phenylphenol

DING Jielian; JIN Qiu; ZENG Chongyu; ZHANG Yinhua

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Promotive effect of potassium on Pt/γ-Al₂O₃ catalyst for preparing o-phenylphenol

更新时间：2025-12-10

- Promotive effect of potassium on Pt/γ-Al₂O₃ catalyst for preparing o-phenylphenol
- CIESC Journal Issue 2, Pages: 366-370(2008)
- 作者机构：
  
  南京工业大学化学化工学院，盐城华业医药化工有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 February 2008，
  
  Published：05 February 2008
- 稿件说明：
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DING Jielian, JIN Qiu, ZENG Chongyu, et al. Promotive effect of potassium on Pt/γ-Al₂O₃ catalyst for preparing o-phenylphenol[J]. CIESC Journal, 2008, (2): 366-370.
DOI：

DING Jielian, JIN Qiu, ZENG Chongyu, et al. Promotive effect of potassium on Pt/γ-Al₂O₃ catalyst for preparing o-phenylphenol[J]. CIESC Journal, 2008, (2): 366-370. DOI：

摘要

通过加入不同K助剂对0.5% Pt/γ-Al2O3催化剂进行改性，考察了其在由环己烯基环己酮脱氢制邻苯基苯酚（OPP）的催化反应中的催化性能，利用XRD、H2-TPD、NH3-TPD、CO2-TPD等手段对催化剂进行表征，并与反应结果关联。研究表明，Pt/γ-Al2O3催化剂加入K助剂后不同程度地减少了催化剂表面的酸、碱量和对氢的吸附量;采用6.00%K2SO4作为助剂，明显地弱化了催化剂表面的强酸和强碱中心，减少了酸、碱量，调整了催化剂表面对中间产物、OPP和氢吸附量，抑制了副反应，可显著提高生成OPP的选择性，在LHSV 0.12 h-1、H2空速33 ml·g-1·h-1、380℃的反应条件下，环己烯基环己酮转化率为100%，OPP选择性达90%以上。

Abstract

The effects of 0.5％ Pt/γ-Al2O3 catalysts with different K promoters for preparing o-phenylphenol (OPP) from o-cyclohexenylcyclohexanone dehydrogenation were studied.These catalysts were characterized by XRD

H2-TPD

NH3-TPD

CO2-TPD techniques.The results showed that the addition of K decreased the acidity

basicity and the volume of absorbed hydrogen.The 6.00%K2SO4 promoter weakened the acid-base strength and decreased the acid-base sites.It also adjusted the adsorption of intermediate products

OPP and volume of hydrogen

prohibited the formation of byproducts

and obviously improved the selectivity of OPP.The conversion of o-cyclohexenylcyclohexanone reached 100% and the selectivity of o-phenylphenol was more than 90% with 0.12 h-1 of LHSV and 33 ml·g-1·h-1 H2 flow rate at 380℃.

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Promotive effect of potassium on Pt/γ-Al2O3 catalyst for preparing o-phenylphenol

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摘要

Abstract

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Promotive effect of potassium on Pt/γ-Al₂O₃ catalyst for preparing o-phenylphenol