APPLICATION OF ZEOLITE 3A SYNTHESIZED FROM KANKARA CLAY FOR DEHYDRATION OF ETHANOL

  • A.S. Olawale
  • O.A. Ajayi
  • A.M. Bello
Keywords: Molecular sieve, kaolin, water adsorption, isotherm models, breakthrough curve.

Abstract

In this work zeolite 3A pellets produced from Kankara kaolin through the normal hydrothermal (3AH) and fusion-hydrothermal (3AFH) routes and, commercial zeolite 3A (3AC) were characterized and used to dehydrate water-ethanol mixture at 90oC. The pore size of 3AFH, 3AH and 3AC were 3.09, 3.78 and 2.82 Å respectively. The corresponding specific surface areas were 254.60, 177.0 and 225.5 m2/g. The respective bulk densities of samples’ pellets were 0.687. 0.673 and 0.91 g/cm3. The properties compare well with the literature values except 3AH pore size. The breakthrough curves were obtained with 80 – 95 wt.% ethanol-water mixtures on 3AFH and 3AC pellets. However, only 95 wt% ethanol feed produced fuel grade (≥99.5 wt%) ethanol. The respective breakthrough times at inlet/outlet water concentrations (C/Co) of 0.1 were 50 and 75 min on 3AFH and 3AC. Thus 3AFH pellets performed fairly well in comparison with commercial zeolite (3AC) pellets.

Author Biographies

A.S. Olawale

Department of Chemical Engineering, Ahmadu Bello University, Zaria. Nigeria.

O.A. Ajayi

Department of Chemical Engineering, Ahmadu Bello University, Zaria. Nigeria.

A.M. Bello

Department of Chemical Engineering, Ahmadu Bello University, Zaria. Nigeria.

Published
2019-07-17