Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15)
Santa Barbara Amorphous-15 (SBA-15) is a promising molecular sieve material with its highly uniform porosity; nonetheless, its tubular pore channels discouraged mass transfer of reactants during catalysis. Herein, SBA-15 was altered by microemulsion technique to prepare two fibrous SBA-15 with disti...
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| Format: | Article |
| Language: | English |
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Elsevier
2021
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| Online Access: | http://umpir.ump.edu.my/id/eprint/33847/1/Methane%20dry%20reforming%20over%20Ni.pdf |
| _version_ | 1796995043426304000 |
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| author | Chi, Cheng Chong Yoke, Wang Cheng Syahida Nasuha, Bukhari Setiabudi, H. D. Aishah, Abdul Jalil |
| author_facet | Chi, Cheng Chong Yoke, Wang Cheng Syahida Nasuha, Bukhari Setiabudi, H. D. Aishah, Abdul Jalil |
| author_sort | Chi, Cheng Chong |
| collection | UMP |
| description | Santa Barbara Amorphous-15 (SBA-15) is a promising molecular sieve material with its highly uniform porosity; nonetheless, its tubular pore channels discouraged mass transfer of reactants during catalysis. Herein, SBA-15 was altered by microemulsion technique to prepare two fibrous SBA-15 with distinct morphologies, viz. rod-liked F-SBA-15 and dendritic DFSBA-15. After Ni impregnation, the Ni/fibrous SBA-15 catalysts (Ni/F-SBA-15 and Ni/DFSBA-15) were catalytically evaluated with methane dry reforming (MDR). From characterization, rod-shaped F-SBA-15 had outer fibrous layer whereas dendritic DFSBA-15 consisted of a solid core with radially projected fibres. Besides, Ni/F-SBA-15 possessed uneven sized NiO but Ni/DFSBA-15 had uniform NiO dispersion. Characterization also proved that fibrillation and Ni impregnation did not alter the pristine properties of SBA-15. However, the surface attributes of SBA-15 remarkably reduced after fibrillation and Ni impregnation. The strength of metal-support (Ni-SiO2) interaction could be ranked as: Ni/DFSBA-15 > Ni/F-SBA-15 > Ni/SBA-15 (previously reported). Both Ni/fibrous SBA-15 catalysts exhibited high proportion of moderate basicity, which favoured the carbon removal via reverse Boudouard reaction. In accordance with endothermicity, the optimal temperature of MDR over both catalysts was 800 °C as greater temperature provoked conspicuous CH4 thermal decomposition. For 50 h MDR at 800 °C, both catalysts presented superior catalytic activity and stability. With a fully accessible siliceous framework, Ni/DFSBA-15 attained greater reactant conversions (84.05–87.40% and 81.80–85.60% ) than Ni/F-SBA-15 (80.30–85.80% and 76.73–84.10% ). In overall, Ni/DFSBA-15 was more coke-resistant than Ni/F-SBA-15 by virtue of its fully accessible structure, uniformly dispersed Ni phase, and stronger metal-support interaction |
| first_indexed | 2024-03-06T12:56:31Z |
| format | Article |
| id | UMPir33847 |
| institution | Universiti Malaysia Pahang |
| language | English |
| last_indexed | 2024-03-06T12:56:31Z |
| publishDate | 2021 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | UMPir338472022-04-22T03:40:39Z http://umpir.ump.edu.my/id/eprint/33847/ Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15) Chi, Cheng Chong Yoke, Wang Cheng Syahida Nasuha, Bukhari Setiabudi, H. D. Aishah, Abdul Jalil TP Chemical technology Santa Barbara Amorphous-15 (SBA-15) is a promising molecular sieve material with its highly uniform porosity; nonetheless, its tubular pore channels discouraged mass transfer of reactants during catalysis. Herein, SBA-15 was altered by microemulsion technique to prepare two fibrous SBA-15 with distinct morphologies, viz. rod-liked F-SBA-15 and dendritic DFSBA-15. After Ni impregnation, the Ni/fibrous SBA-15 catalysts (Ni/F-SBA-15 and Ni/DFSBA-15) were catalytically evaluated with methane dry reforming (MDR). From characterization, rod-shaped F-SBA-15 had outer fibrous layer whereas dendritic DFSBA-15 consisted of a solid core with radially projected fibres. Besides, Ni/F-SBA-15 possessed uneven sized NiO but Ni/DFSBA-15 had uniform NiO dispersion. Characterization also proved that fibrillation and Ni impregnation did not alter the pristine properties of SBA-15. However, the surface attributes of SBA-15 remarkably reduced after fibrillation and Ni impregnation. The strength of metal-support (Ni-SiO2) interaction could be ranked as: Ni/DFSBA-15 > Ni/F-SBA-15 > Ni/SBA-15 (previously reported). Both Ni/fibrous SBA-15 catalysts exhibited high proportion of moderate basicity, which favoured the carbon removal via reverse Boudouard reaction. In accordance with endothermicity, the optimal temperature of MDR over both catalysts was 800 °C as greater temperature provoked conspicuous CH4 thermal decomposition. For 50 h MDR at 800 °C, both catalysts presented superior catalytic activity and stability. With a fully accessible siliceous framework, Ni/DFSBA-15 attained greater reactant conversions (84.05–87.40% and 81.80–85.60% ) than Ni/F-SBA-15 (80.30–85.80% and 76.73–84.10% ). In overall, Ni/DFSBA-15 was more coke-resistant than Ni/F-SBA-15 by virtue of its fully accessible structure, uniformly dispersed Ni phase, and stronger metal-support interaction Elsevier 2021 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/33847/1/Methane%20dry%20reforming%20over%20Ni.pdf Chi, Cheng Chong and Yoke, Wang Cheng and Syahida Nasuha, Bukhari and Setiabudi, H. D. and Aishah, Abdul Jalil (2021) Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15). Catalysis Today, 375. pp. 245-257. ISSN 0920-5861. (Published) https://doi.org/10.1016/j.cattod.2020.06.073 https://doi.org/10.1016/j.cattod.2020.06.073 |
| spellingShingle | TP Chemical technology Chi, Cheng Chong Yoke, Wang Cheng Syahida Nasuha, Bukhari Setiabudi, H. D. Aishah, Abdul Jalil Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15) |
| title | Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15) |
| title_full | Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15) |
| title_fullStr | Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15) |
| title_full_unstemmed | Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15) |
| title_short | Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15) |
| title_sort | methane dry reforming over ni fibrous sba 15 catalysts effects of support morphology rod liked f sba 15 and dendritic dfsba 15 |
| topic | TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/33847/1/Methane%20dry%20reforming%20over%20Ni.pdf |
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