Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts
Empty fruit bunch (EFB) is a biomass residue from palm oil plantations, abundant in tropical countries like Malaysia. EFB is a valuable resource when utilized for energy recovery. Rice husk ash (RHA), retrieved after pyrolyzing and calcining rice husks, has high silica content and is a low-cost alte...
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| Format: | Article |
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Springer Science and Business Media Deutschland GmbH
2023
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| author | Shahdan, Nadhilah Aqilah Balasundram, Vekes Ibrahim, Norazana Isha, Ruzinah |
| author_facet | Shahdan, Nadhilah Aqilah Balasundram, Vekes Ibrahim, Norazana Isha, Ruzinah |
| author_sort | Shahdan, Nadhilah Aqilah |
| collection | ePrints |
| description | Empty fruit bunch (EFB) is a biomass residue from palm oil plantations, abundant in tropical countries like Malaysia. EFB is a valuable resource when utilized for energy recovery. Rice husk ash (RHA), retrieved after pyrolyzing and calcining rice husks, has high silica content and is a low-cost alternative to conventional silica precursors. This study utilizes RHA as a silica precursor for catalyst synthesis, labelled CRHA. CRHA is metal-modified using nickel and iron, forming NiCRHA, FeCRHA and NiFeCRHA catalysts. The synthesized catalysts were applied to the pyrolysis of EFB and compared with HZSM-5 via thermogravimetric analyser (TGA). From TGA, CRHA produced similar amount of volatilized matter (75.1 wt%) to HZSM-5 catalyst (73.3 wt%) while using NiCRHA resulted in the highest amount of volatilized matter (83.9 wt%) among the catalytic runs. Kinetic analysis from the application of Coats-Redfern method showed that the non-catalytic run followed a one-dimensional diffusion while the catalytic runs followed the anti-Jander diffusion. The activation energy, Ea, was overall reduced from 74.15 kJ·mol-1 with the presence of the catalysts in the order of: 69.64 kJ·mol-1 (EFB-NiCRHA) > 64.28 kJ·mol-1 (EFB-CRHA) > 63.57 kJ·mol-1 (EFB-NiFeCRHA) > 58.77 kJ·mol-1 (EFB-FeCRHA) > 53.81 kJ·mol-1 (EFB-HZSM-5). Despite NiCRHA having the highest Ea among the catalytic runs, it also had the highest pre-exponential factor (1.48 × 104 min-1) allowing the reaction to overcome the energy barrier and volatilized the most matter. This study showed that low-cost alternative sources can be used for catalysts synthesis and applied to thermochemical processes like pyrolysis. |
| first_indexed | 2024-09-23T23:57:41Z |
| format | Article |
| id | utm.eprints-105511 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-09-23T23:57:41Z |
| publishDate | 2023 |
| publisher | Springer Science and Business Media Deutschland GmbH |
| record_format | dspace |
| spelling | utm.eprints-1055112024-06-30T00:35:11Z http://eprints.utm.my/105511/ Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts Shahdan, Nadhilah Aqilah Balasundram, Vekes Ibrahim, Norazana Isha, Ruzinah T Technology (General) Empty fruit bunch (EFB) is a biomass residue from palm oil plantations, abundant in tropical countries like Malaysia. EFB is a valuable resource when utilized for energy recovery. Rice husk ash (RHA), retrieved after pyrolyzing and calcining rice husks, has high silica content and is a low-cost alternative to conventional silica precursors. This study utilizes RHA as a silica precursor for catalyst synthesis, labelled CRHA. CRHA is metal-modified using nickel and iron, forming NiCRHA, FeCRHA and NiFeCRHA catalysts. The synthesized catalysts were applied to the pyrolysis of EFB and compared with HZSM-5 via thermogravimetric analyser (TGA). From TGA, CRHA produced similar amount of volatilized matter (75.1 wt%) to HZSM-5 catalyst (73.3 wt%) while using NiCRHA resulted in the highest amount of volatilized matter (83.9 wt%) among the catalytic runs. Kinetic analysis from the application of Coats-Redfern method showed that the non-catalytic run followed a one-dimensional diffusion while the catalytic runs followed the anti-Jander diffusion. The activation energy, Ea, was overall reduced from 74.15 kJ·mol-1 with the presence of the catalysts in the order of: 69.64 kJ·mol-1 (EFB-NiCRHA) > 64.28 kJ·mol-1 (EFB-CRHA) > 63.57 kJ·mol-1 (EFB-NiFeCRHA) > 58.77 kJ·mol-1 (EFB-FeCRHA) > 53.81 kJ·mol-1 (EFB-HZSM-5). Despite NiCRHA having the highest Ea among the catalytic runs, it also had the highest pre-exponential factor (1.48 × 104 min-1) allowing the reaction to overcome the energy barrier and volatilized the most matter. This study showed that low-cost alternative sources can be used for catalysts synthesis and applied to thermochemical processes like pyrolysis. Springer Science and Business Media Deutschland GmbH 2023 Article PeerReviewed Shahdan, Nadhilah Aqilah and Balasundram, Vekes and Ibrahim, Norazana and Isha, Ruzinah (2023) Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts. Biomass Conversion and Biorefinery, 13 (18). pp. 16441-16451. ISSN 2190-6815 http://dx.doi.org/10.1007/s13399-023-04000-7 DOI : 10.1007/s13399-023-04000-7 |
| spellingShingle | T Technology (General) Shahdan, Nadhilah Aqilah Balasundram, Vekes Ibrahim, Norazana Isha, Ruzinah Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts |
| title | Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts |
| title_full | Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts |
| title_fullStr | Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts |
| title_full_unstemmed | Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts |
| title_short | Thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal-impregnated rice husk ash catalysts |
| title_sort | thermogravimetric and kinetic studies on pyrolysis of empty fruit bunch over metal impregnated rice husk ash catalysts |
| topic | T Technology (General) |
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