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dc.contributor.authorOng, Hang Mengen_US
dc.contributor.authorVeksha, Andreien_US
dc.contributor.authorHa, Quan Luu Manhen_US
dc.contributor.authorHuang, Jijiangen_US
dc.contributor.authorTsakadze, Zviaden_US
dc.contributor.authorLisak, Grzegorzen_US
dc.identifier.citationOng, H. M., Veksha, A., Ha, Q. L. M., Huang, J., Tsakadze, Z. & Lisak, G. (2022). Catalytic activity and coke resistance of gasification slag-supported Ni catalysts during steam reforming of plastic pyrolysis gas. ACS Sustainable Chemistry & Engineering, 10(51), 17167-17176.
dc.description.abstractPyrolysis gas from polyolefinic plastic waste is a hydrocarbon-rich feedstock for sustainable syngas production. The effect of Cr, Mo, and W promoters on the activity of gasification slag-supported Ni catalysts during the reforming of plastic pyrolysis gas was investigated (polyethylene and polypropylene mixed feedstock, Ni:promoter molar ratio = 4.5, 800 °C, steam-To-carbon molar ratio of 7). Based on 3 h reforming tests, all catalysts showed stable conversion efficiency, suggesting that gasification slag from municipal solid waste is a promising replacement material for traditionally used alumina supports. Moreover, the slag demonstrated good thermal stability and potential for catalyst recycling, justifying the economic benefit of valorizing the material. Interestingly, interaction between slags and promoters is evidenced by the formation of CaWO4and CaMoO4phases, which may have an impact on the reforming activity of bimetallic catalysts. Among the studied catalysts, the highest conversion efficiency of hydrocarbon compounds (76%), highest H2(122.65 mmol Lfeed-1) and CO (49.34 mmol Lfeed-1) yields, and lowest coke deposition (0.06 wt %) were demonstrated by the Ni-Mo catalyst. The superior performance of Ni-Mo was accompanied by the growth of carbon nanotubes via a tip-growth mechanism, which was not observed in other catalysts. Spherical carbon nanocages and filamentous carbon nanofibers predominated in coke deposits of Ni, Ni-W, and Ni-Cr. The high syngas production efficiency of Ni-Mo could be attributed to the dispersion of metal by the growing carbon nanotubes providing the reaction sites for reforming and coke gasification reactions. Owing to these properties, Ni catalyst promoted by Mo and loaded on a gasification support has high potential for the syngas production from plastic pyrolysis gas.en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.description.sponsorshipPublic Utilities Board (PUB)en_US
dc.relation.ispartofACS Sustainable Chemistry & Engineeringen_US
dc.rights© 2022 American Chemical Society. All rights reserved.en_US
dc.subjectEngineering::Environmental engineering::Waste managementen_US
dc.titleCatalytic activity and coke resistance of gasification slag-supported Ni catalysts during steam reforming of plastic pyrolysis gasen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchResidues and Resource Reclamation Centreen_US
dc.subject.keywordsGasification Slagen_US
dc.subject.keywordsNickel Catalysten_US
dc.description.acknowledgementThis research was supported by the National Research Foundation, Singapore and PUB, Singapore’s National Water Agency under its RIE2025 Urban Solutions and Sustainability (USS) (Water) Centre of Excellence (CoE) Programme, which provides funding to the Nanyang Environment & Water Research Institute (NEWRI) of the Nanyang Technological University, Singapore (NTU).en_US
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