Alkylation of Benzene with Ethanol on Zeolites Modified with La₂O₃

Abstract:

Alkylation of benzene with ethanol for synthesis of ethylbenzene was performed over parent zeolites and zeolites modified with La2O3, such as HMCM-22, HBeta and nano HZSM-5 in a fixed-bed reactor at CO2 flow. The properties of zeolites and catalysts were characterized by XRD, BET and NH3-TPD. The results indicated that zeolite catalysts modified with La2O3 showed high conversion of benzene and high selectivity of ethylbenzene, i.e., 25 % conversion of benzene and 92.72% selectivity of ehtylbenzene over 3%La2O3-HZSM-5(Si/Al=200) respectively. The high selectivity of ethylbenzene is attributed to the proper acid property of modified HZSM-5, and it can be concluded that acid properties is the main factor to affect on this Alkylation. In addition, the deactivation obviously restricted over 5%La2O3-HMCM-22 and 3%La2O3-HZSM-5(Si/Al=200) on time on-stream of reaction, due to enhancement of anti-coking capability and hydrothermal stability after modification.

• Periodical: Advanced Materials Research (Volumes 347-353)
• Pages: 3670-3676
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.347-353.3670
• Online since: October 2011
• Authors: Jun Hui Li, Ya Nan Wang, Jun He, Zhi Rong Zhu
• Keywords: Alkylation, Benzene, Ehtanol, La₂O₃, Zeolite

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