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Dealumination of Zeolite Beta Catalyst Under Controlled Conditions for Enhancing its Activity in Acylation and Esterification

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Title: Dealumination of Zeolite Beta Catalyst Under Controlled Conditions for Enhancing its Activity in Acylation and Esterification
Authors: Srivastava, Rajendra Browse this author
Iwasa, Nobuhiro Browse this author
Fujita, Shin-ichiro Browse this author →KAKEN DB
Arai, Masahiko Browse this author →KAKEN DB
Keywords: Zeolite beta
Dealumination
Acidity
Acylation
Esterification
Issue Date: Jul-2009
Publisher: Springer Netherlands
Journal Title: Catalysis Letters
Volume: 130
Issue: 3-4
Start Page: 655
End Page: 663
Publisher DOI: 10.1007/s10562-009-9992-0
Abstract: This work deals with the dealumination of zeolite beta (HBEA) under different conditions to optimize its catalytic performance. The dealumination was carried out either using oxalic or tartaric acid solution of different pH values or steaming up to 500℃. The dealuminated zeolite samples were characterized using X-ray diffraction (XRD), N2-physisorption, ICP, 27Al NMR and NH3-TPD. Their catalytic activities were studied for acylation reaction of 2-methoxy naphthalene or naphthalene with acetic anhydride and esterification of benzyl alcohol with hexanoic acid. Among the dealuminated samples examined, those treated with oxalic acid or tartaric acid at pH 2 showed high activity. The high activity can be correlated with the relative increase in the amount of strong acid sites and with the enhanced accessibility of the reactants to the active sites, which are caused by removal of extra-framework Al species on the acid treatments.
Rights: The original publication is available at springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/38804
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 荒井 正彦

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