Development And Optimization Of Ethylbenzene Production Via Zeolite-Catalyzed Alkylation Of Benzene With Ethylene

Abstract

Ethylbenzene (EB) is a vital intermediate in the petrochemical industry, primarily used as a precursor for styrene production, which underpins a wide range of polymer industries including rubber, plastics, and resins. The global production capacity of EB exceeds 28 million tons annually, with significant contributions from Russia and other major producers. Traditional methods of EB synthesis relied on homogeneous catalysts such as aluminum chloride (AlCl₃), which, although effective, posed environmental and operational challenges due to corrosiveness, toxicity, and waste generation. Recent advances have shifted toward heterogeneous catalysis, particularly zeolite-based catalysts such as ZSM-5 and MCM-22, which offer high selectivity, longer catalyst life, and eco-friendly operation. This paper discusses the technological evolution of EB production, emphasizing the role of zeolite catalysts in optimizing reaction conditions, improving yield, and reducing environmental impact. The study reviews current industrial processes, highlighting innovations such as fixed-bed reactors and process intensification strategies that enhance efficiency and sustainability. Furthermore, the discussion explores the reaction mechanisms, catalyst properties, and operational parameters critical for maximizing product purity and process economics. The findings suggest that zeolite catalysis presents a promising pathway for sustainable EB production, aligning industrial practices with environmental regulations and economic goals. Ongoing challenges, including catalyst deactivation and by-product management, are addressed, and future directions for research, such as catalyst design and process automation, are proposed. Overall, this review underscores the importance of integrating catalytic innovation with process engineering to meet the increasing demand for high-quality ethylbenzene in a sustainable manner.