Filtration and catalytic performance of blended TS-1/CNF composite catalyst

ZHAO Qian; LI Ping; LI Daoquan; ZHANG Leiming; ZHOU Xinggui; YUAN Weikang; HU Xijun

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Filtration and catalytic performance of blended TS-1/CNF composite catalyst

更新时间：2025-12-10

- Filtration and catalytic performance of blended TS-1/CNF composite catalyst
- CIESC Journal Issue 8, Pages: 2000-2006(2008)
- 作者机构：
  
  1. 化学工程联合国家重点实验室(华东理工大学),上海,200237
  2. 河北工业大学化学工程与工艺系,天津,300130
  3. 香港科技大学化学工程系,香港
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 August 2008，
  
  Published：05 August 2008
- 稿件说明：
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ZHAO Qian, LI Ping, LI Daoquan, et al. Filtration and catalytic performance of blended TS-1/CNF composite catalyst[J]. CIESC Journal, 2008, (8): 2000-2006.
DOI：

ZHAO Qian, LI Ping, LI Daoquan, et al. Filtration and catalytic performance of blended TS-1/CNF composite catalyst[J]. CIESC Journal, 2008, (8): 2000-2006. DOI：

摘要

纳米碳纤维（CNF）是一种新型的碳基催化剂载体。采用机械湿混的方式制得了混合型钛硅分子筛/纳米碳纤维（TS-1/CNF）催化剂，研究了其在水相体系中的过滤性能，以及在环己酮氨氧化反应中的催化活性。与单独TS-1相比，混合型TS-1/CNF催化剂的团聚体宏观尺寸较大，CNF交织形成的大量大孔非常有利于液体的穿透，使得TS-1/CNF催化剂具有良好的过滤性能，因而可改善TS-1在水相体系中的分离问题。SEM观察显示，CNF具有独特的长纤维结构以及较大的外表面，为TS-1微粒提供了较多的附着点，使得TS-1能均匀分布在CNF表面上。TS-1颗粒与直径处于相同尺度的CNF之间可能存在着较强的分子间作用力、静电作用力及疏水作用力，可避免分散和过滤过程中两者的分离。混合型TS-1/CNF催化剂上环己酮氨氧化反应的结果表明，环己酮的转化率接近100%，环己酮肟收率达98.4%，与纯TS-1的催化活性相当。

Abstract

Carbon nanofiber (CNF) is a novel carbon based catalyst support.A TS-1/CNF composite catalyst was synthesized in liquid phase by using a method of mechanical blending.The filtration performance of the blended TS-1/CNF composite in aqueous system and its catalytic performance on ammoximation of cyclohexanone were studied.As compared with pristine TS-1 catalyst

the TS-1/CNF composite was comprised of relatively larger particles

which could be easily filtrated from the aqueous system.Meanwhile

there were a great number of macro pores in agglomerates of TS-1/CNF composite formed via CNF interweaving

in favor of liquid penetration through the filter layer of TS-1/CNF.The SEM images revealed that TS-1 particles were uniformly adsorbed on CNF surface.The unique long filament and large external surface of CNF might offer abundant adhesion sites to TS-1 particles. Strong inter-molecular

electrostatic and hydrophobic forces might exist between TS-1 particles and CNF

preventing the supported TS-1 from detaching off the CNF during stirring and filtering.The results of ammoximation of cyclohexanone over the blended TS-1/CNF composite catalyst showed that the conversion of cyclohexanone and the yield of oxime could reach 100% and 98.4%

respectively

as high as those obtained over pristine TS-1 catalyst.

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