Micron‐Sized Zeolite Beta Single Crystals Featuring Intracrystal Interconnected Ordered Macro‐Meso‐Microporosity Displaying Superior Catalytic Performance. (6th August 2020)

• Record Type: Journal Article
• Authors: Sun, Ming‐Hui; Chen, Li‐Hua; Yu, Shen; Li, Yu; Zhou, Xian‐Gang; Hu, Zhi‐Yi; Sun, Yu‐Han; Xu, Yan; Su, Bao‐Lian
• Is Part Of: Angewandte Chemie. Volume 132:Number 44(2020)
• Page Start: 19750
• Page End: 19759
• Publication Date: 2020-08-06
• Subjects: alkylation -- cracking -- hierarchical zeolites -- intracrystalline porous hierarchy -- zeolite Beta; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202007069
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Zeolite Beta single crystals with intracrystalline hierarchical porosity at macro‐, meso‐, and micro‐length scales can effectively overcome the diffusion limitations in the conversion of bulky molecules. However, the construction of large zeolite Beta single crystals with such porosity is a challenge. We report herein the synthesis of hierarchically ordered macro‐mesoporous single‐crystalline zeolite Beta (OMMS‐Beta) with a rare micron‐scale crystal size by an in situ bottom‐up confined zeolite crystallization strategy. The fully interconnected intracrystalline macro‐meso‐microporous hierarchy and the micron‐sized single‐crystalline nature of OMMS‐Beta lead to improved accessibility to active sites and outstanding (hydro)thermal stability. Higher catalytic performances in gas‐phase and liquid‐phase acid‐catalyzed reactions involving bulky molecules are obtained compared to commercial Beta and nanosized Beta zeolites. The strategy has been extended to the synthesis of other zeolitic materials, including ZSM‐5, TS‐1, and SAPO‐34. Abstract : An in situ bottom‐up confined zeolite crystallization strategy is developed to construct micron‐sized hierarchically ordered macro‐mesoporous single‐crystalline zeolite Beta with improved accessibility to active sites and outstanding (hydro)thermal stability for both gas‐phase and liquid‐phase acid‐catalyzed reactions of bulky molecules.