在批次和固定床反应器中用于菜子油酯化K/Al_2O_3催化剂的稳定性(英文)

作     者：Petr Kutálek Libor apek Lucie Smoláková David Kubikb Martin Hájek 

作者机构：Department of Physical ChemistryFaculty of Chemical TechnologyUniversity of PardubiceStudentská 573532 10 PardubiceCzech Republic Research Institute of Inorganic ChemistryRENTECH-UniCREChempark Litvínov Záluí-Litvínov436 70Czech Republic 

出 版 物：《催化学报》 (Chinese Journal of Catalysis)

年 卷 期：2014年第35卷第7期

页      面：1084-1090页

核心收录：

学科分类：081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：the Czech Science Founda-tion (Preject No. P106/11/0773) The infrastructure of the UniCRE centre (project CZ.1.05/2.1.00/03.0071) was used 

主　　题：固定床反应器 固体催化剂 Al2O3 稳定性 菜籽油 转移反应 傅立叶变换红外光谱法 酯基 

摘      要：Catalytically active, stable, and mechanically durable solid K/Al 2 O 3 catalysts for the transesterification of rapeseed oil with methanol was studied. In a batch reactor, high catalytic activity was accompanied by leaching of K species, caused by glycerol, and mechanical destruction of the solid catalyst as a result of contact with the stirrer. In a fixed-bed reactor, some leaching of K species into the liquid phases was also observed, but approached 0 during 30 h of time-on-stream; the activity of the K/Al 2 O 3 catalyst (∼83% ester yield) was stable for 100 h of time-on-stream and no mechanical destruction of the catalyst was observed. The populations of K 2 O and K-O-Al species for fresh and used K/Al 2 O 3 catalysts were compared using Fourier transform infrared spectroscopy. It was found that some K 2 O species leached into the liquid phases at the beginning of the reaction.