Development of Water Adsorbents Synthesized from Spent Bleaching Earth to Dehydrate Ethanol Water Mixture

Abstract:

Water adsorbent to dehydrate water ethanol mixture was synthesized from spent bleaching earth (SBE) using modified fusion method. The SBE was regenerated using heat at 750°C. Predetermined alumina, Al₂O₃ and a stochiometric amount of KOH was added to the regenerated SBE, mixed and fused at several temperatures for 12 hours in a furnace. The fused mixture was grounded and mixed with water to get 40-55% KOH solution in water. This mixture was aged for several pre determined temperature for several pre determined days in a closed container before crystallization took place in 5 part by weight 5% KOH for 48 hours. The product obtained was washed 3 times with distilled water using filtration set and dried in oven at 220°C for 20 hours. Results from Karl Fischer Titration showed that the product was able to absorb water up above 0.0200 g/g adsorbent which was approximately 50% performance of commercial zeolite A. The best conditions for synthesizing the water adsorbent from SBE were : 80 g alumina added per 100 gram kaolin, fused temperature of 650°C, aging temperature of 80°C for 5 days. However, XRD results showed that the synthesized product was not the type of zeolite A.

• Periodical: Advanced Materials Research (Volume 970)
• Pages: 187-191
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.970.187
• Online since: June 2014
• Authors: Zharin Shah Abd Aziz*, Abdurahman Hamid Nour, Mohd Yunos Rosli
• Keywords: Ethanol Water Mixture, Modified Fusion Method, Spent Bleaching Earth, Water Adsorbents

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