Synthesis and Testing of Zeolite from IndustrialWaste Coal Fly Ash as Sorbent For Water Adsorption from Ethanol Solution

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Author list: Panitchakarn, P.;Klamrassamee, P.;Laosiripojana, N.;Viriya-empikul, N.;Pavasant, P.

Publication year: 2014

Journal: Engineering Journal (0125-8281)

Volume number: 18

Issue number: 1

Start page: 1

End page: 12

ISSN: 0125-8281

Abstract

In the present work, zeolite was prepared from industrial-waste coal fired ash (CFA) by fusion technique with and without acid-washing pretreatment under various conditions. The synthesized materials were then tested for water adsorption from bioethanol solution with an aim to produce a high purity ethanol (>99.5%) for later utilization in gasohol production manufacturing. From our studies, it was found that the impurities (i.e., Fe2O3, TiO2, MgO, CaO, K2O and SO3) in CFA could be efficiently removed by acid-washing pretreatment. Among three different acids studied (i.e. HCl, HNO3, and H2SO4), HCl exhibited the highest pretreatment performance, while the most suitable pretreatment conditions to enhance high purity raw material (up to 85% purity) were by using 20%HCl with the acid to CFA ratio of 25 mlHCl

Keywords

Zeolite, coal fly ash, fusion, water adsorption, bioethanol