Kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina
Desulfurization of liquid fuels mitigates the amount of noxious sulfur oxides and particulates released during fuel combustion. Existing literature on oxidative-adsorptive desulfurization technologies focus on sulfur-in-fuel removal by various materials, but very little information is presented abou...
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ph-ateneo-arc.es-faculty-pubs-11062022-12-06T01:15:17Z Kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina Feliciano, Reyson M Ensano, Benny Marie B de Luna, Mark Daniel G Futalan, Cybelle M Abarca, Ralf Ruffel M Lu, Ming-Chun Desulfurization of liquid fuels mitigates the amount of noxious sulfur oxides and particulates released during fuel combustion. Existing literature on oxidative-adsorptive desulfurization technologies focus on sulfur-in-fuel removal by various materials, but very little information is presented about their desorption kinetics and thermodynamics. Herein, we report for the first time, the mechanism of sulfur desorption from neutral activated alumina saturated with dibenzothiophene sulfone. Batch experiments were conducted to examine the effects of agitation rate, desorption temperature, sulfur content, and eluent type on sulfur desorption efficiencies. Results show enhanced desorption capacities at higher agitation rate, desorption temperature, and initial sulfur content. Desorption efficiency and capacity of acetone were found to be remarkably superior to ethanol, acetone:ethanol (1:1), and acetone:isopropanol (1:1). Desorption kinetics reveal excellent fit of the nonlinear pseudo-second-order equation on desorption data, indicating chemisorption as the rate-determining step. Results of the thermodynamics study show the spontaneous (ΔG° ≤ -2.08 kJ mol-1) and endothermic (ΔH° = 32.35 kJ mol-1) nature of sulfur desorption using acetone as eluent. Maximum regeneration efficiency was attained at 93% after washing the spent adsorbent with acetone followed by oven-drying. Scanning electron microscopy, Fourier transform infrared, and X-ray diffraction spectroscopy analyses reveal the intact and undamaged structure of neutral activated alumina even after adsorbent regeneration. Overall, the present work demonstrates the viability of neutral activated alumina as an efficient and reusable adsorbent for the removal of sulfur compounds from liquid fossil fuels. 2022-01-01T08:00:00Z text https://archium.ateneo.edu/es-faculty-pubs/107 https://doi.org/10.1007/s11356-021-13913-7 Environmental Science Faculty Publications Archīum Ateneo Acetone Activated alumina Air pollution mitigation Desulfurization Dibenzothiophene sulfone Eluent Environmental Health and Protection Environmental Sciences Physical Sciences and Mathematics |
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Acetone Activated alumina Air pollution mitigation Desulfurization Dibenzothiophene sulfone Eluent Environmental Health and Protection Environmental Sciences Physical Sciences and Mathematics |
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Acetone Activated alumina Air pollution mitigation Desulfurization Dibenzothiophene sulfone Eluent Environmental Health and Protection Environmental Sciences Physical Sciences and Mathematics Feliciano, Reyson M Ensano, Benny Marie B de Luna, Mark Daniel G Futalan, Cybelle M Abarca, Ralf Ruffel M Lu, Ming-Chun Kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina |
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Desulfurization of liquid fuels mitigates the amount of noxious sulfur oxides and particulates released during fuel combustion. Existing literature on oxidative-adsorptive desulfurization technologies focus on sulfur-in-fuel removal by various materials, but very little information is presented about their desorption kinetics and thermodynamics. Herein, we report for the first time, the mechanism of sulfur desorption from neutral activated alumina saturated with dibenzothiophene sulfone. Batch experiments were conducted to examine the effects of agitation rate, desorption temperature, sulfur content, and eluent type on sulfur desorption efficiencies. Results show enhanced desorption capacities at higher agitation rate, desorption temperature, and initial sulfur content. Desorption efficiency and capacity of acetone were found to be remarkably superior to ethanol, acetone:ethanol (1:1), and acetone:isopropanol (1:1). Desorption kinetics reveal excellent fit of the nonlinear pseudo-second-order equation on desorption data, indicating chemisorption as the rate-determining step. Results of the thermodynamics study show the spontaneous (ΔG° ≤ -2.08 kJ mol-1) and endothermic (ΔH° = 32.35 kJ mol-1) nature of sulfur desorption using acetone as eluent. Maximum regeneration efficiency was attained at 93% after washing the spent adsorbent with acetone followed by oven-drying. Scanning electron microscopy, Fourier transform infrared, and X-ray diffraction spectroscopy analyses reveal the intact and undamaged structure of neutral activated alumina even after adsorbent regeneration. Overall, the present work demonstrates the viability of neutral activated alumina as an efficient and reusable adsorbent for the removal of sulfur compounds from liquid fossil fuels. |
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text |
author |
Feliciano, Reyson M Ensano, Benny Marie B de Luna, Mark Daniel G Futalan, Cybelle M Abarca, Ralf Ruffel M Lu, Ming-Chun |
author_facet |
Feliciano, Reyson M Ensano, Benny Marie B de Luna, Mark Daniel G Futalan, Cybelle M Abarca, Ralf Ruffel M Lu, Ming-Chun |
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Feliciano, Reyson M |
title |
Kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina |
title_short |
Kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina |
title_full |
Kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina |
title_fullStr |
Kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina |
title_full_unstemmed |
Kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina |
title_sort |
kinetics and thermodynamics of organo-sulfur-compound desorption from saturated neutral activated alumina |
publisher |
Archīum Ateneo |
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2022 |
url |
https://archium.ateneo.edu/es-faculty-pubs/107 https://doi.org/10.1007/s11356-021-13913-7 |
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1751550496055754752 |