Alkylation of Benzene with Ethanol over ZSM-5 Based La–P Catalysts

Sabit Eyyub Mamedov (Department of Physical and Colloid Chemistry, Chemistry Faculty, Baku State University, Baku AZ 1148)
Aynur Abulfat Iskenderova (Department of Physical and Colloid Chemistry, Chemistry Faculty, Baku State University, Baku AZ 1148)
Eyyub Sabit Mammadov (Faculty of Chemistry, Baku Branch of Moscow State University, Baku, AZ1144)
Nargiz Firudin Akhmedova (Department of Physical and Colloid Chemistry, Chemistry Faculty, Baku State University, Baku AZ 1148)
Fuad Shamsaddin Kerimli (Department of Physical and Colloid Chemistry, Chemistry Faculty, Baku State University, Baku AZ 1148)
Sevda Baba Ismayilova (Department of Physical and Colloid Chemistry, Chemistry Faculty, Baku State University, Baku AZ 1148)

Bulletin of Chemical Reaction Engineering & Catalysis
2026: BCREC Volume 21 Issue 1 Year 2026 (April 2026)

Benzene ethylation in the presence of HZSM-5 zeolites is a promising method for producing ethylbenzene. This study examined the effects of modifying lanthanum and phosphorus as additives to the HZSM-5 catalyst, tested in the temperature range of 300-500 °C, at a benzene to ethanol molar ratio of 2:1 in a hydrogen stream. The influence of promoters on acidity and pore structure was investigated using X-ray Diffraction (XRD), NH3 Temperature Programmed Desorption (NH3-TPD), Scanning Electron Microscope (SEM), Brunauer, Emmett, and Teller (BET), and Barrett-Joyner-Halenda (BJH). Among 4%La samples, 4%P/HZSM-5 demonstrated higher ethylbenzene selectivity and operational stability associated with a decrease in the density of strong acid sites and an increase in zeolite mesoporosity because of modification. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).