Catalytic gasification of food waste in supercritical water over La promoted Ni/Al2O3 catalysts for enhancing H2 production |
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| Affiliation: | 1. Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou, 310014, China;2. Hangzhou Linjiang Environmental Energy Co. Ltd., Hangzhou, 311200, China;3. Zhejiang Energy Group R&D, Hangzhou, 310007, China;1. School of Chemistry, College of Science, University of Tehran, Tehran, Iran;2. Department of Chemistry, Alborz Campus, University of Tehran, Tehran, Iran;3. Biotechnology Department, College of Science, University of Tehran, Tehran, Iran;1. Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada;2. Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India;3. Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, Canada;4. Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Centre National de la Recherche Scientifique (CNRS), Orléans, France;1. Department of Chemical Engineering, Universidade Estadual de Maringá, 87020-900 Maringá, PR, Brazil;2. Department of Chemical Engineering, Universidade Federal do Paraná, 81531-990 Curitiba, PR, Brazil;3. Food Technology Departament, Universidade Federal de Viçosa, 36570-000 Viçosa, MG, Brazil;4. Department of Agricultural, Food and Nutritional Sciences, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, AB, Canada;1. Department of Energy Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Faculty of Mechanical Engineering, Yildiz Technical University, Besiktas, Istanbul, Turkey |
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| Abstract: | Ni/Al2O3 catalyst is the one of promising catalysts for enhancing H2 production from supercritical water gasification (SCWG) of biomass. However, due to carbon deposition, the deactivation of Ni/Al2O3 catalyst is still a serious issue. In this work, the effects of lanthanum (La) as promoter on the properties and catalytic performance of Ni/Al2O3 in SCWG of food waste were investigated. La promoted Ni/Al2O3 catalysts with different La loading content (3–15 wt%) were prepared via impregnation method. The catalysts were characterized using XRD, SEM, BET techniques. The SCWG experiments were carried out in a Hastelloy batch reactor in the operating temperature range of 420–480 °C, and evaluated based on H2 production. The stability of the catalysts was assessed by the amount of carbon deposition on catalyst surface and their catalytic activity after reuse cycles. The results showed that 9 wt% La promoter is the optimal loading as Ni/9La–Al2O3 catalyst performed best performance with the highest H2 yield of 8.03 mol/kg, and H2 mole fraction of 42.46% at 480 °C. La promoted Ni/Al2O3 catalysts have better anti-carbon deposition properties than bare Ni/Al2O3 catalyst, resulting in better gasification efficiency after reuse cycles. Ni/9La–Al2O3 catalyst showed high catalytic activity in SCWG of food waste and had good stability as it was still active for enhancing H2 production when used in SCWG for the third time, which indicated that La promoted Ni/Al2O3 catalysts are potential additive to improve the SCWG of food waste. |
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| Keywords: | Food waste Supercritical water Gasification La promoter Catalyst |
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