Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalyst
The production of H2-rich syngas from pyrolysis-catalytic gasification of plastic waste bottles has been investigated. The hybrid-functional materials consisting of Ni as catalyst, CaO as CO2 sorbent and Ca2SiO4 as a polymorphic active spacer were synthesized. The different parameters (Ni loading, t...
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| Language: | English |
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Elsevier
2025-03-01
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| Series: | Carbon Capture Science & Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772656825000223 |
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| author | Tian Heng Qin Guozhao Ji Boyu Qu Alan J McCue Shaoliang Guan Jos Derksen Ye Shui Zhang |
| author_facet | Tian Heng Qin Guozhao Ji Boyu Qu Alan J McCue Shaoliang Guan Jos Derksen Ye Shui Zhang |
| author_sort | Tian Heng Qin |
| collection | DOAJ |
| description | The production of H2-rich syngas from pyrolysis-catalytic gasification of plastic waste bottles has been investigated. The hybrid-functional materials consisting of Ni as catalyst, CaO as CO2 sorbent and Ca2SiO4 as a polymorphic active spacer were synthesized. The different parameters (Ni loading, temperature, N2 flow rate and feedstock-to-catalyst ratio) have been investigated to optimise the H2 production. The catalysts were analysed by N2 physisorption, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Temperature-programmed reduction (TPR) and in-situ Transmission Electron Microscopy (TEM). Temperature-programmed oxidation (TPO) was used to analyse the carbon formation on the used catalysts. The highest H2 production of 59.15 mmol g-1of plastic was obtained in the presence of a catalyst with 20 wt.% Ni loading, which amounts to H2 purity as high as 54.2 vol% in gas production. Furthermore, 90.63 mmol g-1of plastic of syngas was produced by increasing the feedstock-to-catalyst ratio to 4:1, yielding 84.4 vol.% of total gas product (53.1 vol.% of H2 and 31.3 vol.% of CO, respectively). The Ni-CaOCa2SiO4 hybrid-functional material is a very promising catalyst in the pyrolysis-catalytic gasification process by capturing CO2 as it is produced, therefore shifting the water gas shift (WGS) reaction to enhance H2 production from plastic waste. Detailed elucidation of the roles of each component at the microscale during the catalytic process was also provided through in-situ TEM analysis. The finding could guide the industry for future large-scale application to convert abundant plastic waste into H2-rich syngas, therefore contributing to the global ‘net zero’ ambition. |
| format | Article |
| id | doaj-art-86edff7abe1a49bab9f276fcdd8ade18 |
| institution | Kabale University |
| issn | 2772-6568 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Carbon Capture Science & Technology |
| spelling | doaj-art-86edff7abe1a49bab9f276fcdd8ade182025-02-02T05:29:33ZengElsevierCarbon Capture Science & Technology2772-65682025-03-0114100382Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalystTian Heng Qin0Guozhao Ji1Boyu Qu2Alan J McCue3Shaoliang Guan4Jos Derksen5Ye Shui Zhang6School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UKKey Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science & Technology, Dalian University of Technology, Dalian 116024, ChinaSchool of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK; Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science & Technology, Dalian University of Technology, Dalian 116024, ChinaAdvanced Centre for Energy and Sustainability (ACES), Department of Chemistry, School of Natural and Computing Sciences, University of Aberdeen, Aberdeen, AB24 3UE, UKDepartment of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UKSchool of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UKSchool of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK; Corresponding author.The production of H2-rich syngas from pyrolysis-catalytic gasification of plastic waste bottles has been investigated. The hybrid-functional materials consisting of Ni as catalyst, CaO as CO2 sorbent and Ca2SiO4 as a polymorphic active spacer were synthesized. The different parameters (Ni loading, temperature, N2 flow rate and feedstock-to-catalyst ratio) have been investigated to optimise the H2 production. The catalysts were analysed by N2 physisorption, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Temperature-programmed reduction (TPR) and in-situ Transmission Electron Microscopy (TEM). Temperature-programmed oxidation (TPO) was used to analyse the carbon formation on the used catalysts. The highest H2 production of 59.15 mmol g-1of plastic was obtained in the presence of a catalyst with 20 wt.% Ni loading, which amounts to H2 purity as high as 54.2 vol% in gas production. Furthermore, 90.63 mmol g-1of plastic of syngas was produced by increasing the feedstock-to-catalyst ratio to 4:1, yielding 84.4 vol.% of total gas product (53.1 vol.% of H2 and 31.3 vol.% of CO, respectively). The Ni-CaOCa2SiO4 hybrid-functional material is a very promising catalyst in the pyrolysis-catalytic gasification process by capturing CO2 as it is produced, therefore shifting the water gas shift (WGS) reaction to enhance H2 production from plastic waste. Detailed elucidation of the roles of each component at the microscale during the catalytic process was also provided through in-situ TEM analysis. The finding could guide the industry for future large-scale application to convert abundant plastic waste into H2-rich syngas, therefore contributing to the global ‘net zero’ ambition.http://www.sciencedirect.com/science/article/pii/S2772656825000223Pyrolysis-catalytic gasificationHydrogenPlastic wasteHybrid-functional catalyst |
| spellingShingle | Tian Heng Qin Guozhao Ji Boyu Qu Alan J McCue Shaoliang Guan Jos Derksen Ye Shui Zhang Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalyst Carbon Capture Science & Technology Pyrolysis-catalytic gasification Hydrogen Plastic waste Hybrid-functional catalyst |
| title | Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalyst |
| title_full | Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalyst |
| title_fullStr | Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalyst |
| title_full_unstemmed | Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalyst |
| title_short | Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalyst |
| title_sort | pyrolysis catalytic gasification of plastic waste for hydrogen rich syngas production with hybrid functional ni caoca2sio4 catalyst |
| topic | Pyrolysis-catalytic gasification Hydrogen Plastic waste Hybrid-functional catalyst |
| url | http://www.sciencedirect.com/science/article/pii/S2772656825000223 |
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