NDLI: Decrement of coke from phenol hydroxylation on iron on zeolite beta by employing dealuminated support

Content Provider	Springer Nature Link
Author	Sophiphun, Onsulang Demir, Dilek Föttinger, Karin Rupprechter, Günther Loiha, Sirinuch Neramittagapong, Arthit Prayoonpokarach, Sanchai Wittayakun, Jatuporn
Copyright Year	2015
Abstract	An attempt to decrease coke formation from phenol hydroxylation on iron catalyst supported on zeolite beta (Fe/HBEA) was investigated. HBEA was dealuminated by refluxing in nitric acid. The dealumination removed all framework aluminum atoms and presumably generated hydroxyl nests of the tetrahedral vacant sites which were strongly acidic. An iron catalyst supported on dealuminated zeolite beta (Fe/D-BEA) was prepared by stirring the dealuminated HBEA in a solution of Fe(NO$_{3}$)$_{2}$. The obtained catalyst had an Fe loading 2.60 wt%. The Fe had an oxidation state +3 and tetrahedral coordination. After loading, the zeolite structure was slightly contracted by the insertion of Fe ions into the vacant sites and calcination. The strong acid sites on D-BEA were suppressed. When Fe/D-BEA was tested in phenol hydroxylation, a steady conversion around 56 % was reached in 6 min. Catechol and hydroquinone were the major products with the mole ratio 2:1. However, cokes were still observed. The type of cokes from Fe/D-BEA was similar to those from Fe/HBEA but the amount from Fe/D-BEA was lower. Thus, the product yields from Fe/D-BEA were higher.
Starting Page	705
Ending Page	713
Page Count	9
File Format	PDF
ISSN	18785190
Journal	Reaction Kinetics and Catalysis Letters
Volume Number	117
Issue Number	2
e-ISSN	18785204
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-12-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Zeolite beta BEA Dealumination Iron Phenol hydroxylation Catalysis Physical Chemistry Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Catalysis

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