Cobalt oxide-alumina catalysts for the methane-assisted selective catalytic reduction of SO2 to sulfur
Preventing emission of pollutants in any kind, is a way to protect global environment. The objective of this study is to develop cobalt catalysts supported on alumina for the conversion of the toxic gas SO2 into elemental sulfur using methane. Although several useful catalysts have been proposed, th...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023084773 |
| _version_ | 1827616049490558976 |
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| author | Masoud Khani Seyyed Ebrahim Mousavi Reza Khalighi Saeed Abbasizadeh Hassan Pahlavanzadeh Habib Ale Ebrahim Abbas Mozaffari |
| author_facet | Masoud Khani Seyyed Ebrahim Mousavi Reza Khalighi Saeed Abbasizadeh Hassan Pahlavanzadeh Habib Ale Ebrahim Abbas Mozaffari |
| author_sort | Masoud Khani |
| collection | DOAJ |
| description | Preventing emission of pollutants in any kind, is a way to protect global environment. The objective of this study is to develop cobalt catalysts supported on alumina for the conversion of the toxic gas SO2 into elemental sulfur using methane. Although several useful catalysts have been proposed, there is still a need to synthesize a catalyst with a high sulfur yield that is also persistent during on-stream stability. To this end, four different catalysts were prepared using the wet impregnation technique, with Co3O4 content ranging from 0 to 15 wt%. Catalytic activity tests were carried out at atmospheric pressure and temperatures ranging from 550 to 800 °C. The Al2O3–Co (15 %) catalyst exhibited superior performance, with a sulfur yield of 98.1 % at 750 °C. The catalytic stability of the best catalyst was examined using a 20 h on-stream stability test under the optimized conditions including an SO2/CH4 molar feed ratio of 2 at 750 °C. The structural changes of the used catalyst after the stability test were investigated using XRD and TPO analyses. It was revealed that sulfidation of Co3O4 after a short while, results in decreasing the sulfur yield from 98.1 % to 89.8 %. |
| first_indexed | 2024-03-09T09:20:28Z |
| format | Article |
| id | doaj.art-efc12330e2314a618be29ce36309350f |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-09T09:20:28Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-efc12330e2314a618be29ce36309350f2023-12-02T07:01:41ZengElsevierHeliyon2405-84402023-11-01911e21269Cobalt oxide-alumina catalysts for the methane-assisted selective catalytic reduction of SO2 to sulfurMasoud Khani0Seyyed Ebrahim Mousavi1Reza Khalighi2Saeed Abbasizadeh3Hassan Pahlavanzadeh4Habib Ale Ebrahim5Abbas Mozaffari6Faculty of Chemical Engineering, Petrochemical center of Excellency, Amirkabir University of Technology, Tehran, IranFaculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran; Corresponding author.School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran; Corresponding author.Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, IranFaculty of Chemical Engineering, Tarbiat Modares University, Tehran, IranFaculty of Chemical Engineering, Petrochemical center of Excellency, Amirkabir University of Technology, Tehran, IranResearch and Development Unit, Sarcheshmeh Copper Complex, Kerman, IranPreventing emission of pollutants in any kind, is a way to protect global environment. The objective of this study is to develop cobalt catalysts supported on alumina for the conversion of the toxic gas SO2 into elemental sulfur using methane. Although several useful catalysts have been proposed, there is still a need to synthesize a catalyst with a high sulfur yield that is also persistent during on-stream stability. To this end, four different catalysts were prepared using the wet impregnation technique, with Co3O4 content ranging from 0 to 15 wt%. Catalytic activity tests were carried out at atmospheric pressure and temperatures ranging from 550 to 800 °C. The Al2O3–Co (15 %) catalyst exhibited superior performance, with a sulfur yield of 98.1 % at 750 °C. The catalytic stability of the best catalyst was examined using a 20 h on-stream stability test under the optimized conditions including an SO2/CH4 molar feed ratio of 2 at 750 °C. The structural changes of the used catalyst after the stability test were investigated using XRD and TPO analyses. It was revealed that sulfidation of Co3O4 after a short while, results in decreasing the sulfur yield from 98.1 % to 89.8 %.http://www.sciencedirect.com/science/article/pii/S2405844023084773Cobalt oxideAluminaCatalystSelective catalytic reductionSO2Methane |
| spellingShingle | Masoud Khani Seyyed Ebrahim Mousavi Reza Khalighi Saeed Abbasizadeh Hassan Pahlavanzadeh Habib Ale Ebrahim Abbas Mozaffari Cobalt oxide-alumina catalysts for the methane-assisted selective catalytic reduction of SO2 to sulfur Heliyon Cobalt oxide Alumina Catalyst Selective catalytic reduction SO2 Methane |
| title | Cobalt oxide-alumina catalysts for the methane-assisted selective catalytic reduction of SO2 to sulfur |
| title_full | Cobalt oxide-alumina catalysts for the methane-assisted selective catalytic reduction of SO2 to sulfur |
| title_fullStr | Cobalt oxide-alumina catalysts for the methane-assisted selective catalytic reduction of SO2 to sulfur |
| title_full_unstemmed | Cobalt oxide-alumina catalysts for the methane-assisted selective catalytic reduction of SO2 to sulfur |
| title_short | Cobalt oxide-alumina catalysts for the methane-assisted selective catalytic reduction of SO2 to sulfur |
| title_sort | cobalt oxide alumina catalysts for the methane assisted selective catalytic reduction of so2 to sulfur |
| topic | Cobalt oxide Alumina Catalyst Selective catalytic reduction SO2 Methane |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023084773 |
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