Electrochemical hydrogenation and desulfurization of thiophenic compounds over MoS2 electrocatalyst using different membrane-electrode assembly
The desulfurization-hydrogenation of thiophene and benzothiophene in hexadecane as a model diesel fuel was studied through a divided cell with the incorporation of a membrane electrode assembly (MEA) under different current density at a constant charge. The reduction of the thiophenic compounds was...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Iranian Research Organization for Science and Technology (IROST)
2019-01-01
|
| Series: | Advances in Environmental Technology |
| Subjects: | |
| Online Access: | http://aet.irost.ir/article_837_9189d42a46a458bc115cefc216d74b3e.pdf |
| _version_ | 1818884943124627456 |
|---|---|
| author | Foad Mehri Soosan Rowshanzamir |
| author_facet | Foad Mehri Soosan Rowshanzamir |
| author_sort | Foad Mehri |
| collection | DOAJ |
| description | The desulfurization-hydrogenation of thiophene and benzothiophene in hexadecane as a model diesel fuel was studied through a divided cell with the incorporation of a membrane electrode assembly (MEA) under different current density at a constant charge. The reduction of the thiophenic compounds was investigated using a prepared MoS2 nano-electrocatalyst, Nafion (commercial proton exchange membrane), and synthesized sulfonated poly ether ether ketone (SPEEK). Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) were used to characterize the MoS2 electrocatalyst, which confirmed the formation of 23-25 nm ball-like nano-threads of MoS2. Also, the electrocatalyst and/or MEA was electrochemically analyzed by cyclic voltammetry (CV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS). The gas chromatography-mass spectroscopy (GC-MS) analysis of the reactants and products revealed the direct desulfurization on the thiophene reduction process and the desulfurization along with the desulfurization pathway on the benzothiophene reduction experiment. A maximum desulfurization efficiency of 79.6% at 20 mA cm-2 and 51.5% at 30 mA cm-2 under the constant charge of 300 C was obtained for thiophene using the MoS2-Nafion and MoS2-SPEEK system, respectively. Moreover, a maximum hydrogenation and desulfurization efficiency of 28% and 59.1% occurred at 50 mA cm-2 and 70 mA cm-2, respectively, for the benzohiophene-Nafion system under the constant charge of 400 C. The distribution of the products affirmed that the desulfurization reaction contributed more at a higher current density against the hydrogenation process at a lower current density. |
| first_indexed | 2024-12-19T15:57:34Z |
| format | Article |
| id | doaj.art-69a1d7ee0b02425a9203925a1a9cb04a |
| institution | Directory Open Access Journal |
| issn | 2476-6674 2476-4779 |
| language | English |
| last_indexed | 2024-12-19T15:57:34Z |
| publishDate | 2019-01-01 |
| publisher | Iranian Research Organization for Science and Technology (IROST) |
| record_format | Article |
| series | Advances in Environmental Technology |
| spelling | doaj.art-69a1d7ee0b02425a9203925a1a9cb04a2022-12-21T20:15:01ZengIranian Research Organization for Science and Technology (IROST)Advances in Environmental Technology2476-66742476-47792019-01-0151233310.22104/aet.2019.3647.1178837Electrochemical hydrogenation and desulfurization of thiophenic compounds over MoS2 electrocatalyst using different membrane-electrode assemblyFoad Mehri0Soosan Rowshanzamir1School of Chemical Engineering, Iran University of Science and Technology, Tehran, IranSchool of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, IranThe desulfurization-hydrogenation of thiophene and benzothiophene in hexadecane as a model diesel fuel was studied through a divided cell with the incorporation of a membrane electrode assembly (MEA) under different current density at a constant charge. The reduction of the thiophenic compounds was investigated using a prepared MoS2 nano-electrocatalyst, Nafion (commercial proton exchange membrane), and synthesized sulfonated poly ether ether ketone (SPEEK). Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) were used to characterize the MoS2 electrocatalyst, which confirmed the formation of 23-25 nm ball-like nano-threads of MoS2. Also, the electrocatalyst and/or MEA was electrochemically analyzed by cyclic voltammetry (CV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS). The gas chromatography-mass spectroscopy (GC-MS) analysis of the reactants and products revealed the direct desulfurization on the thiophene reduction process and the desulfurization along with the desulfurization pathway on the benzothiophene reduction experiment. A maximum desulfurization efficiency of 79.6% at 20 mA cm-2 and 51.5% at 30 mA cm-2 under the constant charge of 300 C was obtained for thiophene using the MoS2-Nafion and MoS2-SPEEK system, respectively. Moreover, a maximum hydrogenation and desulfurization efficiency of 28% and 59.1% occurred at 50 mA cm-2 and 70 mA cm-2, respectively, for the benzohiophene-Nafion system under the constant charge of 400 C. The distribution of the products affirmed that the desulfurization reaction contributed more at a higher current density against the hydrogenation process at a lower current density.http://aet.irost.ir/article_837_9189d42a46a458bc115cefc216d74b3e.pdfhydrogenationdesulfurizationthiophenicmos2 electrocatalystmembrane-electrode assembly |
| spellingShingle | Foad Mehri Soosan Rowshanzamir Electrochemical hydrogenation and desulfurization of thiophenic compounds over MoS2 electrocatalyst using different membrane-electrode assembly Advances in Environmental Technology hydrogenation desulfurization thiophenic mos2 electrocatalyst membrane-electrode assembly |
| title | Electrochemical hydrogenation and desulfurization of thiophenic compounds over MoS2 electrocatalyst using different membrane-electrode assembly |
| title_full | Electrochemical hydrogenation and desulfurization of thiophenic compounds over MoS2 electrocatalyst using different membrane-electrode assembly |
| title_fullStr | Electrochemical hydrogenation and desulfurization of thiophenic compounds over MoS2 electrocatalyst using different membrane-electrode assembly |
| title_full_unstemmed | Electrochemical hydrogenation and desulfurization of thiophenic compounds over MoS2 electrocatalyst using different membrane-electrode assembly |
| title_short | Electrochemical hydrogenation and desulfurization of thiophenic compounds over MoS2 electrocatalyst using different membrane-electrode assembly |
| title_sort | electrochemical hydrogenation and desulfurization of thiophenic compounds over mos2 electrocatalyst using different membrane electrode assembly |
| topic | hydrogenation desulfurization thiophenic mos2 electrocatalyst membrane-electrode assembly |
| url | http://aet.irost.ir/article_837_9189d42a46a458bc115cefc216d74b3e.pdf |
| work_keys_str_mv | AT foadmehri electrochemicalhydrogenationanddesulfurizationofthiopheniccompoundsovermos2electrocatalystusingdifferentmembraneelectrodeassembly AT soosanrowshanzamir electrochemicalhydrogenationanddesulfurizationofthiopheniccompoundsovermos2electrocatalystusingdifferentmembraneelectrodeassembly |