Microwave-assisted catalytic dehydration of glycerol for sustainable production of acrolein over a microwave absorbing catalyst
Microwave-assisted catalytic dehydration of glycerol for sustainable production of acrolein over a microwave absorbing catalyst
复制标题
微波辅助催化脱水甘油在微波吸收催化剂上可持续生产丙烯醛
DOI：
10.1016/j.apcatb.2018.10.058
复制
发表时间：
2019-04
期刊：
影响因子：
--
通讯作者：
Jianbing Ji
中科院分区：
文献类型：
--
作者：
Qinglong Xie;Shanshan Li;Ruchao Gong;Gaoji Zheng;Yilei Wang;Pan Xu;Ying Duan;Shangzhi Yu;Meizhen Lu;Weirong Ji;Yong Nie;Jianbing Ji
固体催化剂颗粒内的均匀温度分布对于在高温反应中实现低焦炭形成是重要的。然而，在大多数固定床催化反应系统中存在温度分布不均匀的问题。在这里，我们开发了一种微波辅助系统，并将其用于催化甘油脱水可持续生产丙烯醛。制备了涂层型微波吸收催化剂WO 3/ZrO2@SiC，并将其用于催化反应。考察了反应温度、ZrO 2/SiC比和重时空速（WHSV）对甘油转化率和arcolein选择性的影响。实验结果表明，微波加热比常规电加热更有利于甘油在较低温度下脱水生成丙烯醛。微波加热在250 ºC下甘油完全转化，丙烯醛选择性达到70%以上。催化剂的酸性受ZrO 2/SiC比例的影响很大，这反过来又决定了丙烯醛的选择性。更重要的是，在微波加热过程中获得比电加热过程更好的催化剂稳定性。此外，微波加热系统对失活催化剂的原位再生也是有效的。
Uniform temperature distribution within solid catalyst particles is important to achieving low coke formation in a high-temperature reaction. However, the issue of uneven temperature distribution exists in most fixed-bed catalytic reaction systems. Here, we developed a microwave-assisted system and used it in catalytic dehydration of glycerol for sustainable production of acrolein. A coated microwave absorbing catalyst WO3/ZrO2@SiC was prepared and employed in the catalytic reactions. The effects of reaction temperature, ZrO2/SiC ratio, and weight hourly space velocity (WHSV) on glycerol conversion and arcolein selectivity were examined. Experimental results showed that the microwave heating proved to be more effective than the conventional electric heating for glycerol dehydration to acrolein at lower temperature. The acrolein selectivity reached over 70% with complete glycerol conversion at 250 ºC by microwave heating. The catalyst acidity was greatly influenced by ZrO2/SiC ratio, which in turn determined the acrolein selectivity. More importantly, much better catalyst stability was obtained in the microwave-heating process than the electric-heating process. In addition, the microwave-heating system was effective for thein-situregeneration of deactivated catalyst.
登录
查看更多内容
影响因子：
9.8
作者：
Chai, Song-Hai;Wang, Hao-Peng;Xu, Bo-Qing
通讯作者：
Xu, Bo-Qing
影响因子：
--
作者：
W. Suprun;Michal Lutecki;T. Haber;H. Papp
通讯作者：
W. Suprun;Michal Lutecki;T. Haber;H. Papp
影响因子：
15.1
作者：
de Oliveira, Aldenor S.;Vasconcelos, Santiago J. S.;Oliveira, Alcineia C.
通讯作者：
Oliveira, Alcineia C.
影响因子：
--
作者：
A. Sobhy;J. Chaouki
通讯作者：
A. Sobhy;J. Chaouki
影响因子：
7.3
作者：
EMEIS, CA
通讯作者：
EMEIS, CA