(58p) Study on the Adsorptive Desulfurization of Model Fuel

The present work investigates the performance of flyash, coal dust, bentonite, laterite and sodium zeolite as adsorbents for desulfurization of synthetic fuel by batch adsorption experiment at 50⁰C and under atmospheric pressure. A series of synthetic fuel samples containing known concentrations of thiophenol, benzothiophene and di-benzothiophene, as singular and multicomponent mixtures in isooctane at definite concentrations were prepared. The performance of coal dust was found to be the best among all other adsorbents mentioned, in removal of both single and multi sulfur compounds from synthetic fuel. The adsorbents were characterized by BET surface area analyzer and XRF. The effect of parameters such as, stirrer speed, adsorbent particle size, temperature, adsorbent amount, initial sulfur concentration and contact time between adsorbate and adsorbent were investigated for desulfurization of synthetic fuel using coal dust as adsorbent. The sulfur adsorption equilibrium with this adsorbent was fitted into Langmuir, Freundlich, BET, Halsay, Tempkin, Dubinin, Redlich, Sips and Harkins-Jura isotherms.

Keyword:- Coal dust, desulfurization, adsorption isotherm