Aluminosilicate Based Solid Acid Catalyst: Effect of Calcination Time, OH/Al Ratio and Keggin Ion Concentration on its Preparation

Abstract:

The synthesis of acid-activated Al₂O₃-pillared bentonite as a solid acid catalyst has been completed. The pillarization process was carried out using the varying pf calcination time, mole OH/Al ratio, and mmol of Keggin/bentonite to determine the optimum total acidity. The higher the calcination time, (OH/Al) ratio, and suspension concentration, the greater the acidity of ​​the Al₂O₃-pillared bentonite. The optimum conditions were achieved at a calcination time of 20 minutes, a mol of (OH/Al) ratio of 2.2, and Keggin/bentonite of 10 mmol with a total acidity of 11.76 mmol gram ammonia and 2.44 mmol/gram pyridine. The pillared bentonite had a surface area of ​​154.64 m²/g and a pore diameter of 3.38 nm. The pillaring process was successfully increasing the basal spacing of natural bentonite from 14.77 to 17.78.

• Periodical: Advances in Science and Technology (Volume 115)
• Pages: 1-8
• DOI: https://doi.org/10.4028/p-mbzzl3
• Online since: August 2022
• Authors: Ady Mara, Remi Ayu Pratika, Karna Wijaya*, Wega Trisunaryanti, Mudasir Mudasir, Hilda Ismail, Budhijanto Budhijanto, Asma Nadia
• Keywords: Al₂O₃, Bentonite, Pillarization, Solid Acid

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