文献类型：期刊文献

中文题名：焙烧改性对炭载钴基催化剂脱除乙酸乙酯性能的影响

英文题名：Effects of roasting modification on the performance of carbon-supported cobalt-based catalysts for the removal of ethylacetate

作者：程颖[1];梁晓怿[1];肖小菊[1];杨榛[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2025

卷号：44

期号：1

起止页码：50

中文期刊名：炭素技术

外文期刊名：Carbon Techniques

收录：;北大核心:【北大核心2023】；

基金：国家自然科技基金(21978097);中央高校基本科研业务费项目(JKD01211701)。

语种：中文

中文关键词：活性炭;催化氧化;焙烧改性;热稳定性

外文关键词：Activated carbon;catalytic oxidation;roasting modification;thermal stability

摘要：采用滴加浸渍法制备了以活性炭为载体的钴尖晶石氧化物催化剂,重点考察焙烧气氛含氧量和焙烧时间对催化剂去除乙酸乙酯的催化活性及热稳定性的影响。结果表明,采用氮气为初次焙烧气氛结合短时间氧化焙烧改性对催化剂性能表现出显著的优化效果,其中Co-N-4-A-4催化剂的t_(90)值为268℃,400℃时失重率为3.77%,优于未氧化焙烧改性的Co-N-4催化剂(t_(90)=284℃,400℃时失重率为8.91%)。与Co-N-4相比,氧化焙烧改性后Co-N-4-A-4的钴分散度由3.66%提升至7.32%,Co^(3+)/Co^(2+)摩尔比由1.12提升至1.94,表面吸附氧比例由3.04提升至4.33,同时氧空位含量显著提升。
Cobalt spinel oxide catalysts supported on activated carbon were synthesized via the dropwise impregnation method to explore the impact of roasting atmosphere oxygen content and roasting duration on their catalytic activity and thermal stability in the degradation of ethylacetate.The Co-N-4-A-4 catalyst demonstrates superior performance with a t_(90)value of 268℃and a 3.77%weight loss at 400℃,compared to the untreated Co-N-4 catalyst,which has a t_(90)value of 284℃and a weight loss of 8.91%at 400℃.Enhancements in the Co-N-4-A-4 catalyst include a doubling of cobalt dispersion from 3.66%to 7.32%,an increase in the molar ratio of Co^(3+)/Co^(2+)from 1.12 to 1.94,an increase in surface adsorbed oxygen from 3.04 to 4.33,and a significant rise in oxygen vacancies.These improvements indicate that the initial nitrogen roasting atmosphere followed by a brief period of oxidative roasting substantially optimizes the catalyst's performance.