Solvent-free hierarchization of zeolites by carbochlorination. Issue 1 (30th November 2016)

• Record Type: Journal Article
• Authors: Nichterwitz, Martin; Grätz, Sven; Nickel, Winfried; Borchardt, Lars
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 1(2016)
• Page Start: 221
• Page End: 229
• Publication Date: 2016-11-30
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta09145h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Carbochlorination, a solvent-free top-down process, is a novel pathway for the hierarchization of zeolites. Abstract : Carbochlorination, a solvent-free top-down process, is a novel pathway for the hierarchization of zeolites. In contrast to other methods no further washing steps are required. The employed method should serve as a model system for the "upcycling" of coked and deactivated zeolites accumulated by the industry. In order to establish a basic understanding of the process, zeolite H-Y was taken as a model system and a thorough investigation of important reaction parameters, like chlorination temperature, time and concentration, carbon loading, and Si/Al ratio, was performed. Under optimized conditions, we have been able to hierarchize H-Y with high yield, doubling the mesopore volume while maintaining the crystallinity and surface area.