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Preparation and catalytic activities of porous clay heterostructures from aluminium-intercalated clays: effect of Al content

Published online by Cambridge University Press:  27 February 2018

Fethi Kooli ,
Yan Liu ,
Kais Hbaieb  and
Rawan Al-Faze
Fethi Kooli*
Affiliation:
Taibah University-Al-Mahd Branch, Community College, Al-Mahd 44412, Saudi Arabia
Yan Liu
Affiliation:
Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore 627833
Kais Hbaieb
Affiliation:
Mechanical Engineering Department, Taibah University, POB 141 Madinah Al-Munawwarah, Saudi Arabia
Rawan Al-Faze
Affiliation:
Taibah University, Chemistry Department, P.O. Box 30002, Al-Madinah Al-Munawwarah 41447, Saudi Arabia
*
*E-mail: fkooli@taibahu.edu.sa
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Abstract

Porous clay heterostructures were prepared from Al-intercalated clays, and they allowed the insertion of Al into the framework of intercalated silica in porous clay heterostructures (PCHs). This method has led to tuneable Al contents within the resulting porous clay heterostructures. X-ray fluorescence confirmed the presence of Al in the intercalated precursors and their derivatives (porous clay heterostructure materials) in various environments, as indicated by 27Al magic-angle spinning nuclear magnetic resonance. The Al porous clay heterostructures exhibited specific surface areas that varied from 743 to 850 m2/g with total acid concentrations which varied from 0.969 to 1.420 mmol of protons/g of material, values which were deduced from the temperature desorption of cyclohexylamine. These acid sites were sufficiently strong to initiate the hydro-isomerization of n-heptane. The catalytic properties of the porous clay heterostructures depended on the Al contents and reached a maximum conversion rate of 50% and an isomer selectivity of 70% at a test reaction temperature of 350°C.

Keywords

clay mineralspillared claysporous heterostructure claysmesoporous materialshydro-isomerization
Type
Research Article
Information
Clay Minerals , Volume 52 , Issue 4 , December 2017 , pp. 521 - 535
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2017

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