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EFFECT OF ALKALI METAL IONS ON DIFFERENT ZEOLITES FOR ALKYLATION OF CUMENE

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Last updated: 03 Jan 2025

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Chemistry

Abstract

The effects of alkali metal treatment on different zeolite catalysts are investigated to better understand the nature of alkali metal species for the selective catalytic alkylation of cumene by ethylene. H-ZSM5, Y and BEA zeolite catalysts with various molar ratios of K, Rb, and Cs are prepared by ion exchange method and calcined at 550 oC in air atmosphere for 2 h. The study was carried out at 300, 350, 400 and 450 °C for reaction times of 2 hours. Cumene conversion was found to increase with all different alkali metal additions and the reaction temperatures. The catalysts are characterized by temperature-programmed desorption of NH3/ or CO2 (TPD), Fourier transform infrared (FT-IR) after pyridine adsorption and inductively-coupled plasma emission spectrometry (i.c.p.e.s.). The FTIR results are compared to Lewis and Broensted acid sites. Furthermore, the relation between atomic size of alkali metal ion exchanged and the basicity of the catalyst is discussed. Among them the 0.025 M Cs exchanged is found as very active catalyst for alkylation of cumene with ethylene resulted in amyl benzene, styrene and ethyl benzene.

DOI

10.21608/absb.2012.7207

Keywords

ZSM-5, Y, BEA zeolite, alkylation, TPD, ICPES, FTIR

Authors

First Name

MOHAMED

Last Name

ABDALAH

MiddleName

H.

Affiliation

Department of Chemistry, Faculty of science, Al-Azhar University, Assiut 71524, Egypt

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Volume

23

Article Issue

Issue 2-A

Related Issue

1369

Issue Date

2012-12-01

Receive Date

2012-01-01

Publish Date

2012-12-01

Page Start

97

Page End

112

Print ISSN

1110-2535

Online ISSN

2636-3305

Article File

ABSB_Volume 23_Issue Issue 2-A_Pages 97-112.pdf

PDF . 356.4kB

Link

https://absb.journals.ekb.eg/article_7207.html

Detail API

https://absb.journals.ekb.eg/service?article_code=7207

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5

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Original Article

Type Code

520

Publication Type

Journal

Publication Title

Al-Azhar Bulletin of Science

Publication Link

https://absb.journals.ekb.eg/

MainTitle

EFFECT OF ALKALI METAL IONS ON DIFFERENT ZEOLITES FOR ALKYLATION OF CUMENE

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Article

Created At

22 Jan 2023