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Synthesis and characterization of highly ordered solid acid catalyst from kaolin

Alaba, Peter Adeniyi and Sani, Yahaya Muhammad and Daud, Wan Mohd Wan (2014) Synthesis and characterization of highly ordered solid acid catalyst from kaolin. In: Proceeding the Regional Conference on Chemical Engineering, December 2-3, 2014, Yogyakarta.

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Crystalline solidacid catalysts exhibit higher catalytic activity and hydrothermal stability in catalytic cracking compared with their amorphous counterparts. This is because of the presence of stronger Brönsted acid sites on their surfaces. Thus, we report the synthesis of crystalline solidacid material by impregnating NaOH into the pores of thermal and acid-treated amorphous aluminosilicate. NH3-TPD, XRD, TGA and DSC revealed the surface acidity, structural and textural properties of the materials. All the kaolinites peaks in the starting material disappeared after the thermal and acid activation. Interestingly, most of the crystalline peaks reappeared with greater intensities at the (0211) band after NaOH impregnation. Further, the crystallinity index calculated by weighted intensity ratio index (WIRI) at (0211) band showed superior crystallinity for the synthesized material than the starting kaolin. This is in consonant with reemerging crystalline peaks. The acidity … This work demonstrates that impregnation of NaOH on amorphous aluminosilicate is a novel route for synthesizing of crystalline superacid catalysts.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Solidacid catalyst; kaolinite; acid activation; alkali activation; crystallinity
Subjects: T Technology > TD Environmental technology. Sanitary engineering
T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 21 Aug 2018 09:26
Last Modified: 21 Aug 2018 09:26

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