Sustainable Liquid-Phase Alkylation of Toluene Using Zeolitic Catalysts: A Comparative Evaluation of Al-Rich Y and Si-Rich Beta Zeolites for Industrial Green Chemistry to Support Sustainable Development Goals (SDGs)

Samaa H. Al-Sultani, Ali Al-Shathr, Bashir Y. Al-Zaidi, Zaidoon M. Shakor, Emad Al-Shafei

Abstract


The sustainable synthesis of linear alkylbenzenes (LABs), key intermediates for surfactants and detergents, is essential for minimizing environmental impact in the chemical industry. This study investigates the catalytic efficiency and coke deposition behavior of Al-rich Y and Si-rich Beta zeolites for the liquid-phase alkylation of toluene with 1-octene. The experiments varied temperature, catalyst loading, and time-on-stream to optimize conversion and selectivity. Al-rich Y-zeolite achieved 90% of 1-octene conversion and superior monoalkyltoluene selectivity due to its higher acidity and surface area. Thermogravimetric analyses revealed distinct soft and hard coke profiles, with Y-zeolite showing slightly higher coke content. A kinetic model supported an accurate prediction of coke decomposition behavior. These findings highlight the potential of Y-zeolite as a robust, eco-friendly catalyst, aligning with sustainable development goals (SDGs) and promoting sustainable catalytic processes in petrochemical industries.


Keywords


Alkylation reactions, Coke deactivation; Coke kinetic modelling; Linear alkylbenzenes (LABs); Monoalkylated toluene; Mono-octyl toluene; Zeolite morphology

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DOI: https://doi.org/10.17509/ajse.v6i2.90148

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