Temperature-dependent synthesis of dimethyl ether (DME) from methanol over beta zeolite: a novel approach to a sustainable fuel

• DOI: 10.1098/rsos.230524
• Publication Date: 2023-08-23T07:05:34Z
• Authors: Puneet Kumar Chau...; Racha Arundhathi; Mahesh W. Kasture; Chanchal Samanta; Rakesh Vankayala; Chiranjeevi Thota
• Keywords: Dimethyl ether; Brønsted–Lowry acid–base theory

Crystalline beta zeolite molecular sieve with SiO2/Al2O3 molar ratio of 28.5 was synthesized by the hydrothermal crystallization method and examined for methanol dehydration reaction. The micro-mesoporous active between 280 450°C. Dimethyl ether (DME) observed as predominant product at all reaction temperatures, a maximum selectivity 47.9% 300°C turnover frequency (TOFMeOH) 741.9 h-1. At increased showed enhanced strong acid site fraction, promoting higher hydrocarbon formation following olefin-based cycle. It revealed that crystallinity, porosity acidity change in environment. Amorphous carbon deposition occurred on zeolite, which involved loss crystallinity to some extent. temperature increase pore-broadening phenomenon elevated regions. Regeneration cycle testing demonstrated activity maintained stable throughout h time-on-stream period.