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Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor

To establish a novel approach for VOCs resource utilization, coupled o-xylene oxidation and hematite reduction was investigated in this study in a high-temperature gas-solid reactor in the temperature range 300–700 °C. As the o-xylene-containing inert gas (N(2)) stream traveled through the hematite...

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Autores principales: Ma, Xiaolong, Zhao, Dandan, Qian, Jinjin, Ma, Zichuan, Cui, Jiansheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8911638/
https://www.ncbi.nlm.nih.gov/pubmed/35268610
http://dx.doi.org/10.3390/molecules27051509
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author Ma, Xiaolong
Zhao, Dandan
Qian, Jinjin
Ma, Zichuan
Cui, Jiansheng
author_facet Ma, Xiaolong
Zhao, Dandan
Qian, Jinjin
Ma, Zichuan
Cui, Jiansheng
author_sort Ma, Xiaolong
collection PubMed
description To establish a novel approach for VOCs resource utilization, coupled o-xylene oxidation and hematite reduction was investigated in this study in a high-temperature gas-solid reactor in the temperature range 300–700 °C. As the o-xylene-containing inert gas (N(2)) stream traveled through the hematite particle bed, its reaction behavior was determined in programmed heating and constant temperature modes. Consequently, the effect of bed temperature, flow rate and o-xylene inlet concentration on both o-xylene removal performance and degree of hematite reduction was studied. The raw hematite and solid products were analyzed by TGA, XRF, XRD and SEM-EDS. The results showed that a temperature above 300 °C was required to completely eliminate o-xylene by hematite, and both o-xylene removal capacity and degree of hematite reduction at 5% breakthrough points enhanced on increasing the temperature and decreasing the flow rate. The increment in temperature from 300 °C to 700 °C led to a gradual reduction of Fe(2)O(3) to Fe(3)O(4), FeO and metallic iron. Thus, this study provides a novel, economic and promising technology for treating the VOC pollutants.
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spelling pubmed-89116382022-03-11 Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor Ma, Xiaolong Zhao, Dandan Qian, Jinjin Ma, Zichuan Cui, Jiansheng Molecules Communication To establish a novel approach for VOCs resource utilization, coupled o-xylene oxidation and hematite reduction was investigated in this study in a high-temperature gas-solid reactor in the temperature range 300–700 °C. As the o-xylene-containing inert gas (N(2)) stream traveled through the hematite particle bed, its reaction behavior was determined in programmed heating and constant temperature modes. Consequently, the effect of bed temperature, flow rate and o-xylene inlet concentration on both o-xylene removal performance and degree of hematite reduction was studied. The raw hematite and solid products were analyzed by TGA, XRF, XRD and SEM-EDS. The results showed that a temperature above 300 °C was required to completely eliminate o-xylene by hematite, and both o-xylene removal capacity and degree of hematite reduction at 5% breakthrough points enhanced on increasing the temperature and decreasing the flow rate. The increment in temperature from 300 °C to 700 °C led to a gradual reduction of Fe(2)O(3) to Fe(3)O(4), FeO and metallic iron. Thus, this study provides a novel, economic and promising technology for treating the VOC pollutants. MDPI 2022-02-23 /pmc/articles/PMC8911638/ /pubmed/35268610 http://dx.doi.org/10.3390/molecules27051509 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Ma, Xiaolong
Zhao, Dandan
Qian, Jinjin
Ma, Zichuan
Cui, Jiansheng
Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor
title Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor
title_full Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor
title_fullStr Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor
title_full_unstemmed Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor
title_short Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor
title_sort utilization of hematite particles for economical removal of o-xylene in a high-temperature gas-solid reactor
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8911638/
https://www.ncbi.nlm.nih.gov/pubmed/35268610
http://dx.doi.org/10.3390/molecules27051509
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