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Dual-bed catalyst system for improving product purity and catalytic stability in alkylbenzene transalkylation

Paper ID Volume ID Publish Year Pages File Format Full-Text
41969 45906 2010 7 PDF Available
Title
Dual-bed catalyst system for improving product purity and catalytic stability in alkylbenzene transalkylation
Abstract

A versatile catalyst system for the transalkylation of alkylbenzenes was developed, comprising Pt/ZSM-12 as the top bed catalyst and H-Beta as the bottom bed catalyst. The dual-bed catalyst system could improve the purity of the benzene product as well as the catalyst stability. The minimum ratio of H-Beta/ZSM-12 can achieve the industrial specification by interplaying the reaction temperatures, feed compositions, and the relative activities for the hydrogenation over Pt/ZSM-12 and the selective naphthene-cracking reaction rate over H-Beta. With increasing the trimethylbenzene (TMB) content of the feed mixture, the product yields of the dual-bed catalyst systems approached thermodynamic compositions due to the enhancement of the TMB reactivity; and the required amount of H-Beta and the minimum reaction temperature to meet benzene product specification became lower. Performance curves in terms of feed compositions, catalyst bed ratios, and reaction temperatures were constructed to aid the design of optimum dual-bed catalyst systems.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (107 K)Download as PowerPoint slideResearch highlights▶ Versatile Pt/zeolite + H-zeolite dual bed catalyst for alkylbenzene transalkylation. ▶ Long catalyst cycle length at high benzene product purity. ▶ Operability with wide range of feedstock composition and high impurity tolerance.

Keywords
Heavy aromatics transalkylation; Alkylbenzene; Zeolite-supported platinum catalyst; Selective cracking; Benzene product purity
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Dual-bed catalyst system for improving product purity and catalytic stability in alkylbenzene transalkylation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 385, Issues 1–2, 15 September 2010, Pages 73–79
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us