Diatomite Stabilized KOH: An Efficient Heterogeneous Catalyst for Cyclopentanone Self‐condensation. Issue 3 (10th December 2020)

• Record Type: Journal Article
• Authors: Xu, Qianqian; Sheng, Xueru; Jia, Haiyuan; Li, Na; Zhang, Jian; Shi, Haiqiang; Niu, Meihong; Ping, Qingwei
• Is Part Of: ChemCatChem. Volume 13:Issue 3(2021)
• Page Start: 916
• Page End: 923
• Publication Date: 2020-12-10
• Subjects: Biomass -- Diatomite -- Heterogeneous catalysts -- KOH -- Self-condensation; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.202001538
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: Aldol condensation of cyclopentanone is an attractive reaction for bio‐jet fuel production. KOH is an efficient homogeneous catalyst for aldol condensation but suffering the problem of separation. In this paper, a heterogeneous catalyst, diatomite stabilized KOH (KOH/diatomite) was prepared in a simple way (dry‐mixed impregnation process), and exhibited good activity (overall yield: 85.0 %) and reusability. To clarify the support effect of diatomite, KOH/SiO2 catalyst was also prepared. According to characterizations of these two catalysts, we suggest that the excellent catalytic activity of KOH/diatomite can be attributed to the formation of K−O−Si bond. In addition, the impurity elements existed in diatomite (e. g. CaO, Na2 O, Al2 O3 ) and higher BET surface areas may also benefit to this reaction. This study provides a new possibility for converting homogeneous catalyst (KOH) to heterogeneous catalyst (KOH/diatomite). In this way, KOH/diatomite performed excellent catalytic activity and exhibited stable reusability, which can avoid the problem of separation and pollution. Abstract : A heterogeneous catalyst (KOH/diatomite) was prepared in a simple way, and exhibited good activity (overall yield: 85.0 %). We suggest that the excellent catalytic activity of KOH/diatomite can be attributed to the formation of K−O−Si bond, the impurity elements existed in diatomite and higher BET surface areas may also benefit.