Isotherm and Thermodynamic Studies on the Removal of Sulfur from Diesel Fuel by Mixing-Assisted Oxidative-Adsorptive Desulfurization Technology

doi:10.1021/acs.energyfuels.8b04242

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Resources Management > Periodical Articles > Item 310902800/32693

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/32693

Title:	Isotherm and Thermodynamic Studies on the Removal of Sulfur from Diesel Fuel by Mixing-Assisted Oxidative-Adsorptive Desulfurization Technology
Authors:	Samaniego, Marvin L. de Luna, Mark Daniel G. Ong, Dennis C. Meng-Wei Wan(萬孟瑋) Ming-Chun Lu(盧明俊)
Contributors:	Univ Philippines, Natl Grad Sch Engn, Environm Engn Program Univ Philippines, Dept Chem Engn Univ Philippines Visayas, Sch Technol Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
Keywords:	AQUEOUS-SOLUTION MESOPOROUS SILICA DIBENZOTHIOPHENE SULFONE DEEP DESULFURIZATION SELECTIVE ADSORPTION BENZOTHIOPHENE EQUILIBRIUM TEMPERATURE ADSORBENTS KINETICS
Date:	2019-02
Issue Date:	2020-07-29 13:55:33 (UTC+8)
Publisher:	AMER CHEMICAL SOC
Abstract:	In recent years, fuel modifications, such as the production of ultralow sulfur diesel, have been mandated by international agencies to limit gaseous sulfur emissions and reduce atmospheric pollution. In this study, raw diesel fuel was subjected to sequential (1) high shear mixing-assisted oxidative desulfurization and (2) adsorptive desulfurization. A detailed study on the isotherm and thermodynamics of sulfur removal was carried out using powdered activated carbon (PAC) and powdered alumina in batch adsorption experiments. Results showed that sulfur adsorption by PAC and powdered alumina followed the Langmuir (R-2 = 0.9020) and the Freundlich (R-2 = 0.8626) isotherm models, respectively. Adsorption of sulfur by powdered alumina was controlled solely by chemisorption, whereas adsorption by PAC was controlled by a combination of a chemical reaction and diffusion process. For both powdered alumina and PAC, the positive values of the enthalpy of activation (Delta H) indicate that the adsorption process was endothermic. Negative Delta S and increasing Delta G values with increase in temperature indicates that lower temperatures favored sulfur adsorption by powdered alumina, whereas positive Delta S and decreasing Delta G values with increase in temperature indicate that sulfur adsorption by PAC was more favorable at high temperature.
Relation:	Energy & Fuels, v.33, n.2, pp.1098-1105
Appears in Collections:	[Dept. of Environmental Resources Management] Periodical Articles

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