MnCe-Al2O3球形颗粒的制备及其催化燃烧环己烷性能
Preparation of MnCe-Al2O3 Spherical Pellets and Their Catalytic Performance in Cyclohexane Combustion
尤生萍 1付换然 1秦璐 2王康 1王希涛2
作者信息
- 1. 天津大学天津膜科学海水淡化重点实验室,天津 300350
- 2. 天津大学化工学院,天津 300350
- 折叠
摘要
挥发性有机物(VOCs)的大量排放会导致环境污染和健康危害,催化燃烧是高效降解 VOCs 的重要手段之一.采用海藻酸盐溶胶-凝胶法合成了 MnCe-Al2O3 球形颗粒作为环己烷催化燃烧催化剂,结果表明,Mn 催化剂中适当添加Ce可提高MnOx的分散性,降低催化剂H2-TPR还原温度.催化剂中Mn和Ce摩尔比为 3∶1、煅烧温度650℃时,催化剂催化燃烧环己烷活性最高,可以在 345℃实现环己烷的完全转化.反应 24h 后,催化剂仍显示出几乎 100%的环己烷转化率,表现了良好的催化稳定性.与浸渍法制备的催化剂相比,MnCe-31-Al2O3-650 催化剂活性更高.
Abstract
The substantial emissions of volatile organic compounds(VOCs)can lead to environmental pollution and health hazards.Catalytic combustion is an efficient method to degrade VOCs.As a catalyst for cyclohexane catalytic combustion,MnCe-Al2O3 spherical pellets were synthesized using the alginate sol-gel method.The results show that adding Ce to Mn catalysts enhances MnOx dispersion and lowers the catalyst's reduction temperature in H2-TPR.The catalyst with a 3∶1 Mn/Ce molar ratio calcined at 650℃showed the highest activity in cyclohexane combustion,thereby achieving complete conversion at 345℃.After 24 h,the catalyst maintained a nearly 100%cyclohexane con-version rate,indicating high stability.The MnCe-31-Al2O3-650 catalyst showed higher activity than those prepared by the impregnation method.
关键词
挥发性有机物/MnCe-Al2O3球形颗粒/海藻酸盐溶胶-凝胶法/催化燃烧/环己烷Key words
volatile organic compounds(VOCs)/MnCe-Al2O3 spherical pellet/alginate sol-gel method/catalytic combustion/cyclohexane引用本文复制引用
出版年
2025
NETL
NSTL
万方数据