Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance
Pre-treating the multi-walled carbon nanotubes (CNTs) support by refluxing in 35 vol% nitric acid followed by heating at the temperature of 600 to 900 °C resulted in the formation of defects on the CNTs. Increasing the temperature of the pre-treatment of the CNTs from 600 °C to 900...
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MDPI AG
2018-11-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/10/11/572 |
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| author | Omid Akbarzadeh Noor Asmawati Mohd Zabidi Yasmin Abdul Wahab Nor Aliya Hamizi Zaira Zaman Chowdhury Zulkifli Merican Aljunid Merican Marlinda Ab Rahman Shamima Akhter Elisa Rasouli Mohd Rafie Johan |
| author_facet | Omid Akbarzadeh Noor Asmawati Mohd Zabidi Yasmin Abdul Wahab Nor Aliya Hamizi Zaira Zaman Chowdhury Zulkifli Merican Aljunid Merican Marlinda Ab Rahman Shamima Akhter Elisa Rasouli Mohd Rafie Johan |
| author_sort | Omid Akbarzadeh |
| collection | DOAJ |
| description | Pre-treating the multi-walled carbon nanotubes (CNTs) support by refluxing in 35 vol% nitric acid followed by heating at the temperature of 600 to 900 °C resulted in the formation of defects on the CNTs. Increasing the temperature of the pre-treatment of the CNTs from 600 °C to 900 °C, enhanced the fraction of cobalt-oxide nanoparticles encapsulated in the channels of CNTs from 31% to 70%. The performance of Co/CNTs in Fischer-Tropsch synthesis (FTS) was evaluated in a fixed-bed micro-reactor at a temperature of 240 °C and a pressure of 2.0 MPa. The highest CO conversion obtained over Co/CNTs.A.900 was 59% and it dropped by ~3% after 130 h of time-on-stream. However, maximum CO conversion using Co/CNTs.A.600 catalysts was 28% and it decreased rapidly by about 54% after 130 h of time-on-stream. These findings show that the combined acid and thermal pre-treatment of CNTs support at 900 °C has improved the stability and activity of the Co/CNTs catalyst in FTS. |
| first_indexed | 2024-04-14T06:05:56Z |
| format | Article |
| id | doaj.art-acbf52e262834459be20ec7365ca3c65 |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-04-14T06:05:56Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-acbf52e262834459be20ec7365ca3c652022-12-22T02:08:32ZengMDPI AGSymmetry2073-89942018-11-01101157210.3390/sym10110572sym10110572Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis PerformanceOmid Akbarzadeh0Noor Asmawati Mohd Zabidi1Yasmin Abdul Wahab2Nor Aliya Hamizi3Zaira Zaman Chowdhury4Zulkifli Merican Aljunid Merican5Marlinda Ab Rahman6Shamima Akhter7Elisa Rasouli8Mohd Rafie Johan9Nanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaDepartment of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak 32610, MalaysiaNanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaNanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaNanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaDepartment of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak 32610, MalaysiaNanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaDepartment of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, MalaysiaNanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaNanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaPre-treating the multi-walled carbon nanotubes (CNTs) support by refluxing in 35 vol% nitric acid followed by heating at the temperature of 600 to 900 °C resulted in the formation of defects on the CNTs. Increasing the temperature of the pre-treatment of the CNTs from 600 °C to 900 °C, enhanced the fraction of cobalt-oxide nanoparticles encapsulated in the channels of CNTs from 31% to 70%. The performance of Co/CNTs in Fischer-Tropsch synthesis (FTS) was evaluated in a fixed-bed micro-reactor at a temperature of 240 °C and a pressure of 2.0 MPa. The highest CO conversion obtained over Co/CNTs.A.900 was 59% and it dropped by ~3% after 130 h of time-on-stream. However, maximum CO conversion using Co/CNTs.A.600 catalysts was 28% and it decreased rapidly by about 54% after 130 h of time-on-stream. These findings show that the combined acid and thermal pre-treatment of CNTs support at 900 °C has improved the stability and activity of the Co/CNTs catalyst in FTS.https://www.mdpi.com/2073-8994/10/11/572carbon nanotubesFischer-Tropschthermal treatmentcobaltcatalystacid treatment |
| spellingShingle | Omid Akbarzadeh Noor Asmawati Mohd Zabidi Yasmin Abdul Wahab Nor Aliya Hamizi Zaira Zaman Chowdhury Zulkifli Merican Aljunid Merican Marlinda Ab Rahman Shamima Akhter Elisa Rasouli Mohd Rafie Johan Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance Symmetry carbon nanotubes Fischer-Tropsch thermal treatment cobalt catalyst acid treatment |
| title | Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance |
| title_full | Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance |
| title_fullStr | Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance |
| title_full_unstemmed | Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance |
| title_short | Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance |
| title_sort | effect of cobalt catalyst confinement in carbon nanotubes support on fischer tropsch synthesis performance |
| topic | carbon nanotubes Fischer-Tropsch thermal treatment cobalt catalyst acid treatment |
| url | https://www.mdpi.com/2073-8994/10/11/572 |
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