Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas
The current paper reports on the kinetics of syngas production from glycerolcatalytic pyrolysis over Ni/α-Al2O3 catalyst promoted by lanthanum. The 3 wt%La-20 wt%Ni/77 wt%α-Al2O3 catalyst was synthesized and its physiochemical properties were characterized. The BET specific surface area was 2.20 m2....
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| Format: | Article |
| Language: | English |
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Elsevier Ltd.
2019
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| Online Access: | http://umpir.ump.edu.my/id/eprint/24333/1/Synthesis%20and%20characterization%20of%20a%20La.pdf |
| _version_ | 1825812587860721664 |
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| author | Nor Shahirah, Mohd Nasir Jolius, Gimbun Lam, Su Shiung Ng, Yun Hau Cheng, C. K. |
| author_facet | Nor Shahirah, Mohd Nasir Jolius, Gimbun Lam, Su Shiung Ng, Yun Hau Cheng, C. K. |
| author_sort | Nor Shahirah, Mohd Nasir |
| collection | UMP |
| description | The current paper reports on the kinetics of syngas production from glycerolcatalytic pyrolysis over Ni/α-Al2O3 catalyst promoted by lanthanum. The 3 wt%La-20 wt%Ni/77 wt%α-Al2O3 catalyst was synthesized and its physiochemical properties were characterized. The BET specific surface area was 2.20 m2.g−1, which was 0.11 m2.g−1 larger than the unpromoted Ni/α-Al2O3 catalyst. Significantly, the BET results were supported by the FESEM image which showed that the promoted catalyst has smaller particle size compared to the unpromoted catalyst. The NH3 and CO2-TPD analyses indicates that the catalyst has net acidity with acid:base ratio of 1.12. Catalytic pyrolysis was performed in a 10 mm-ID stainless steel fixed bed reactor with reaction temperatures set at 973, 1023 and 1073 K, employing a weight-hourly-space-velocity (WHSV) of 4.5 × 104 ml g−1 h−1. From reaction studies, the highest glycerol conversion (XG) value was 36.96% at 1073 K. The resulting syngas has H2:CO ratios always lower than 2.0. Subsequently, mechanistic studies indicate that the catalytic glycerol pyrolysis occurred on single catalytic site via associative adsorption, with molecular surface reaction as the rate-determining step. |
| first_indexed | 2024-03-06T12:31:24Z |
| format | Article |
| id | UMPir24333 |
| institution | Universiti Malaysia Pahang |
| language | English |
| last_indexed | 2024-03-06T12:31:24Z |
| publishDate | 2019 |
| publisher | Elsevier Ltd. |
| record_format | dspace |
| spelling | UMPir243332019-03-19T05:05:53Z http://umpir.ump.edu.my/id/eprint/24333/ Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas Nor Shahirah, Mohd Nasir Jolius, Gimbun Lam, Su Shiung Ng, Yun Hau Cheng, C. K. TP Chemical technology The current paper reports on the kinetics of syngas production from glycerolcatalytic pyrolysis over Ni/α-Al2O3 catalyst promoted by lanthanum. The 3 wt%La-20 wt%Ni/77 wt%α-Al2O3 catalyst was synthesized and its physiochemical properties were characterized. The BET specific surface area was 2.20 m2.g−1, which was 0.11 m2.g−1 larger than the unpromoted Ni/α-Al2O3 catalyst. Significantly, the BET results were supported by the FESEM image which showed that the promoted catalyst has smaller particle size compared to the unpromoted catalyst. The NH3 and CO2-TPD analyses indicates that the catalyst has net acidity with acid:base ratio of 1.12. Catalytic pyrolysis was performed in a 10 mm-ID stainless steel fixed bed reactor with reaction temperatures set at 973, 1023 and 1073 K, employing a weight-hourly-space-velocity (WHSV) of 4.5 × 104 ml g−1 h−1. From reaction studies, the highest glycerol conversion (XG) value was 36.96% at 1073 K. The resulting syngas has H2:CO ratios always lower than 2.0. Subsequently, mechanistic studies indicate that the catalytic glycerol pyrolysis occurred on single catalytic site via associative adsorption, with molecular surface reaction as the rate-determining step. Elsevier Ltd. 2019 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/24333/1/Synthesis%20and%20characterization%20of%20a%20La.pdf Nor Shahirah, Mohd Nasir and Jolius, Gimbun and Lam, Su Shiung and Ng, Yun Hau and Cheng, C. K. (2019) Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas. Renewable Energy, 132. pp. 1389-1401. ISSN 0960-1481. (Published) https://doi.org/10.1016/j.renene.2018.09.033 https://doi.org/10.1016/j.renene.2018.09.033 |
| spellingShingle | TP Chemical technology Nor Shahirah, Mohd Nasir Jolius, Gimbun Lam, Su Shiung Ng, Yun Hau Cheng, C. K. Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas |
| title | Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas |
| title_full | Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas |
| title_fullStr | Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas |
| title_full_unstemmed | Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas |
| title_short | Synthesis and characterization of a La Ni/α-Al2O3catalyst and its use in pyrolysis of glycerol to syngas |
| title_sort | synthesis and characterization of a la ni α al2o3catalyst and its use in pyrolysis of glycerol to syngas |
| topic | TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/24333/1/Synthesis%20and%20characterization%20of%20a%20La.pdf |
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