Kumar A, Reddy SN. Hydrothermal treatment of metal impregnated biomass for the generation of H
2 and nanometal carbon hybrids.
ENVIRONMENTAL RESEARCH 2022;
205:112536. [PMID:
34896086 DOI:
10.1016/j.envres.2021.112536]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 11/03/2021] [Accepted: 12/05/2021] [Indexed: 06/14/2023]
Abstract
The nanocatalyst impregnation onto the biomass matrix has gained importance in enhancing the H2 yield and overcoming the catalyst deactivation problems. In-situ catalytic gasification of Ru/Fe-impregnated sugarcane bagasse and citrus limetta (mosambi peels) were examined and compared with their raw biomass at subcritical and supercritical water conditions. Bagasse having a higher amount of lignocellulosic content produces a maximum yield of H2 over moambi peels. Besides, Ru and Fe nano-metal carbon hybrids with crystalline sizes between 10 and 25 nm were formed during in-situ hydrothermal gasification. The performance of hydrothermal gasification based on hydrogen yield was studied, and it relatively follows the order as temperature, nanoparticle composed, metal loading onto biomass matrix, type of catalyst, and biomass used. At the maximum operating temperature of 600 °C, B: W ratio 1:10 for the resident time of 60 min, highest H2 yield of 12.75 ± 0.17 and 11.20 ± 0.13 mmol/g attained for Ru and Fe impregnated bagasse with the CGE of 72.28 ± 2.17% and 67.08 ± 1.97% respectively. At similar operating conditions, H2 yields of 8.75 ± 0.18 and 8.13 ± 0.16 mmol/g were achieved with the CGE of 62.4 ± 1.91% and 53.7 ± 1.66% for Ru and Fe impregnated mosambi peels, respectively. Based on the H2 and CH4 production, Ru shows the highest performance than Fe catalyst.
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