Metal-Modified Zeolites for Catalytic Dehydration of Bioethanol to Ethylene: Mechanisms, Preparation, and Performance

With increasing demands for sustainable chemical production, bioethanol-derived ethylene offers a promising alternative to petroleum-based routes. This review examines recent advances in metal-modified zeolites for the catalytic conversion of bioethanol to ethylene. The fundamental reaction mechanisms and preparation methodologies are systematically analysed. Various metal modification strategies are discussed alongside their effects on catalyst properties. The influence of zeolite framework characteristics, metal species selection, and reaction parameters on catalytic performance are evaluated. Detailed attention is given to deactivation mechanisms and strategies for catalyst regeneration and lifetime extension. The analysis provides insights into rational catalyst design for sustainable ethylene production, highlighting opportunities for future research in enhancing catalyst stability and efficiency.