fulltext.study @t Gmail

Effects of NaOH solution treatment on the catalytic performances of MCM-49 in liquid alkylation of benzene with ethylene

Paper ID Volume ID Publish Year Pages File Format Full-Text
42003 45907 2010 10 PDF Available
Title
Effects of NaOH solution treatment on the catalytic performances of MCM-49 in liquid alkylation of benzene with ethylene
Abstract

MCM-49 zeolite was alkali-treated with NaOH solutions under mild and severe conditions. The samples before and after alkali-treatment were both used as catalysts in liquid alkylation reaction of benzene with ethylene. XRD, XRF, TPD, TPO, IR, SEM, 29Si NMR, N2 adsorption and desorption techniques were employed to characterize the samples. The mildly alkali-treated samples exhibited higher catalytic stability than the parent HMCM-49, as the amorphous particles on the MCM-49 crystal surface were cleaned and the diffusion of the reactant and product was enhanced. The severe alkali-treatment condition resulted in the selective extraction of silicon atoms and the introduction of extra mesopores. The catalytic stability of the catalysts that had been severely alkali-treated was not as good as that of mildly treated ones, but was still better than that of the parent HMCM-49 catalyst if the alkali-treatment conditions were not too severe.

Graphical abstractThe crystallinity of MCM-49 can be increased by mild alkali-treatment and mesopores can be introduced by severe alkali-treatment. The increased catalytic stability of the alkali-treated samples in the liquid alkylation of benzene with ethylene is mainly attributed to purification of zeolite crystals of the mild alkali-treated samples, and to the facilitated diffusion for substances in the case of severe alkali-treatment.Figure optionsDownload full-size imageDownload high-quality image (115 K)Download as PowerPoint slide

Keywords
MCM-49; Alkali-treatment; Benzene; Ethylene; Liquid alkylation
First Page Preview
Effects of NaOH solution treatment on the catalytic performances of MCM-49 in liquid alkylation of benzene with ethylene
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 383, Issues 1–2, 31 July 2010, Pages 102–111
Authors
, , , , , ,
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