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CHEMISTRY AND MATERIAL SCIENCE
Green approach to production of porous char adsorbents via oxidative carbonization in fluidized catalyst bed
Petr M. Yeletsky, Nikolay A. Yazykov, Yury V. Dubinin, Maksim M. Borodaevskiy, Svetlana A. Selishcheva, Vadim A. Yakovlev Boreskov Institute of Catalysis SB RAS, Novosibirsk
Abstract:
A green and energy-efficient technique for production of porous carbon-mineral chars from agricultural wastes (rice husk, wheat bran) and sedimentary carbonaceous feedstocks (high-ash peat, coal) was developed. It is based on partial combustion in fluidized bed of a deep oxidation catalyst at low temperatures (465 – 600$^\circ$C). This technique yields porous chars with an elevated mineral content that depends on a feedstock used, and gaseous products of complete oxidation. It was found that the obtained chars have developed porosity with BET specific surface area of ca. 50 – 170 m$^2$g$^{-1}$, pore volume of 0.05 – 0.17 ml $\cdot$ g$^{-1}$, and ash content of 16 – 79 wt.%. They were additionally characterized by TGA and FTIR. Their testing as adsorbents for heavy metal ions (by the example of Cu$^{2+}$) and organic dyes (by the example of methyl green) revealed that their adsorption capacities are comparable to those of chars produced by the conventional pyrolytic approaches.
Keywords:
biochar, biomass, rice husk, bran, fluidized catalyst bed, composite.
Received: 06.12.2023 Revised: 06.03.2024 Accepted: 10.03.2024
Citation:
Petr M. Yeletsky, Nikolay A. Yazykov, Yury V. Dubinin, Maksim M. Borodaevskiy, Svetlana A. Selishcheva, Vadim A. Yakovlev, “Green approach to production of porous char adsorbents via oxidative carbonization in fluidized catalyst bed”, Nanosystems: Physics, Chemistry, Mathematics, 15:2 (2024), 285–299
Linking options:
https://www.mathnet.ru/eng/nano1271 https://www.mathnet.ru/eng/nano/v15/i2/p285
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Abstract page: | 27 | Full-text PDF : | 5 |
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