One-step synthesis of ZnFe2O4-loaded biochar derived from leftover rice for high-performance H2S removal

Yi Yuan; Lijia Huang; Tian C. Zhang; Like Ouyang; Shaojun Yuan

doi:10.1016/j.seppur.2021.119686

One-step synthesis of ZnFe₂O₄-loaded biochar derived from leftover rice for high-performance H₂S removal

Yi Yuan, Lijia Huang, Tian C. Zhang, Like Ouyang, Shaojun Yuan

Civil Engineering

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Hydrogen sulfide (H₂S) is a major air pollutant posing a serious threat to the environment and public health. It is highly attractive to develop state-of-the-art adsorbent to remove H₂S. Herein, a novel ZnFe₂O₄-loaded porous biochar (RZF) with a high surface area of 1065 m²/g was synthesized via one-step carbonation activation of kitchen leftover rice with ZnCl₂ and FeCl₃ as activators. The optimized RZF-500-1:1 was obtained by rationally adjusting the activation ratio (the mass ratio of leftover rice and ZnFe₂O₄) and pyrolysis temperature. Such RZF-500-1:1 delivered high-performance H₂S removal with the breakthrough capacity up to 228.29 mg/g at 25 °C, whilst the inactivated biochar (carbonization without activator) only showed a much lower adsorption capacity at circa 12.11 mg/g of H₂S. The desulfurization conditions had a significant effect on the H₂S breakthrough capacity, and the adsorbent exhibited better desulfurization performance at room temperature and in the presence of oxygen. The desulfurization mechanism on the ZnFe₂O₄-loaded biochar was proposed to be an adsorption-catalytic oxidation coupled process. Moreover, the as-fabricated sample showed high regeneration ability, retaining 91.6% of the initial breakthrough capacity after five regeneration cycles. This novel one-step preparation method would permit a gain of time and energy to obtain efficient activated carbons intended to capture H₂S.

Original language	English (US)
Article number	119686
Journal	Separation and Purification Technology
Volume	279
DOIs	https://doi.org/10.1016/j.seppur.2021.119686
State	Published - Dec 15 2021

Keywords

Adsorption
Biochar
HS removal
Leftover rice
One-step synthesis
ZnFeO

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

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10.1016/j.seppur.2021.119686

Cite this

@article{c5dd7d97806f40acbfacdbbce6505ac7,

title = "One-step synthesis of ZnFe2O4-loaded biochar derived from leftover rice for high-performance H2S removal",

abstract = "Hydrogen sulfide (H2S) is a major air pollutant posing a serious threat to the environment and public health. It is highly attractive to develop state-of-the-art adsorbent to remove H2S. Herein, a novel ZnFe2O4-loaded porous biochar (RZF) with a high surface area of 1065 m2/g was synthesized via one-step carbonation activation of kitchen leftover rice with ZnCl2 and FeCl3 as activators. The optimized RZF-500-1:1 was obtained by rationally adjusting the activation ratio (the mass ratio of leftover rice and ZnFe2O4) and pyrolysis temperature. Such RZF-500-1:1 delivered high-performance H2S removal with the breakthrough capacity up to 228.29 mg/g at 25 °C, whilst the inactivated biochar (carbonization without activator) only showed a much lower adsorption capacity at circa 12.11 mg/g of H2S. The desulfurization conditions had a significant effect on the H2S breakthrough capacity, and the adsorbent exhibited better desulfurization performance at room temperature and in the presence of oxygen. The desulfurization mechanism on the ZnFe2O4-loaded biochar was proposed to be an adsorption-catalytic oxidation coupled process. Moreover, the as-fabricated sample showed high regeneration ability, retaining 91.6% of the initial breakthrough capacity after five regeneration cycles. This novel one-step preparation method would permit a gain of time and energy to obtain efficient activated carbons intended to capture H2S.",

keywords = "Adsorption, Biochar, HS removal, Leftover rice, One-step synthesis, ZnFeO",

author = "Yi Yuan and Lijia Huang and Zhang, {Tian C.} and Like Ouyang and Shaojun Yuan",

note = "Funding Information: The authors would like to thank the National Key Research and Development Project (2019YFC1906404) and the National Natural Science Foundation of China (21978182) to provide financial support for this study. The authors also acknowledged the Engineering Teaching Center of School of Chemical Engineering, Sichuan University, for the Raman and FTIR analysis, the Institute of New Energy and Low Carbon Technology, Sichuan University, for XRD and SEM characterization, and the TEM imaging and XPS measurement by Shiyanjia Lab (http//: www.shiyanjia.com). Funding Information: The authors would like to thank the National Key Research and Development Project (2019YFC1906404) and the National Natural Science Foundation of China (21978182) to provide financial support for this study. The authors also acknowledged the Engineering Teaching Center of School of Chemical Engineering, Sichuan University, for the Raman and FTIR analysis, the Institute of New Energy and Low Carbon Technology, Sichuan University, for XRD and SEM characterization, and the TEM imaging and XPS measurement by Shiyanjia Lab (http//: www.shiyanjia.com). Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = dec,

day = "15",

doi = "10.1016/j.seppur.2021.119686",

language = "English (US)",

volume = "279",

journal = "Gas Separation and Purification",

issn = "1383-5866",

publisher = "Elsevier",

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TY - JOUR

T1 - One-step synthesis of ZnFe2O4-loaded biochar derived from leftover rice for high-performance H2S removal

AU - Yuan, Yi

AU - Huang, Lijia

AU - Zhang, Tian C.

AU - Ouyang, Like

AU - Yuan, Shaojun

N1 - Funding Information: The authors would like to thank the National Key Research and Development Project (2019YFC1906404) and the National Natural Science Foundation of China (21978182) to provide financial support for this study. The authors also acknowledged the Engineering Teaching Center of School of Chemical Engineering, Sichuan University, for the Raman and FTIR analysis, the Institute of New Energy and Low Carbon Technology, Sichuan University, for XRD and SEM characterization, and the TEM imaging and XPS measurement by Shiyanjia Lab (http//: www.shiyanjia.com). Funding Information: The authors would like to thank the National Key Research and Development Project (2019YFC1906404) and the National Natural Science Foundation of China (21978182) to provide financial support for this study. The authors also acknowledged the Engineering Teaching Center of School of Chemical Engineering, Sichuan University, for the Raman and FTIR analysis, the Institute of New Energy and Low Carbon Technology, Sichuan University, for XRD and SEM characterization, and the TEM imaging and XPS measurement by Shiyanjia Lab (http//: www.shiyanjia.com). Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/12/15

Y1 - 2021/12/15

N2 - Hydrogen sulfide (H2S) is a major air pollutant posing a serious threat to the environment and public health. It is highly attractive to develop state-of-the-art adsorbent to remove H2S. Herein, a novel ZnFe2O4-loaded porous biochar (RZF) with a high surface area of 1065 m2/g was synthesized via one-step carbonation activation of kitchen leftover rice with ZnCl2 and FeCl3 as activators. The optimized RZF-500-1:1 was obtained by rationally adjusting the activation ratio (the mass ratio of leftover rice and ZnFe2O4) and pyrolysis temperature. Such RZF-500-1:1 delivered high-performance H2S removal with the breakthrough capacity up to 228.29 mg/g at 25 °C, whilst the inactivated biochar (carbonization without activator) only showed a much lower adsorption capacity at circa 12.11 mg/g of H2S. The desulfurization conditions had a significant effect on the H2S breakthrough capacity, and the adsorbent exhibited better desulfurization performance at room temperature and in the presence of oxygen. The desulfurization mechanism on the ZnFe2O4-loaded biochar was proposed to be an adsorption-catalytic oxidation coupled process. Moreover, the as-fabricated sample showed high regeneration ability, retaining 91.6% of the initial breakthrough capacity after five regeneration cycles. This novel one-step preparation method would permit a gain of time and energy to obtain efficient activated carbons intended to capture H2S.

AB - Hydrogen sulfide (H2S) is a major air pollutant posing a serious threat to the environment and public health. It is highly attractive to develop state-of-the-art adsorbent to remove H2S. Herein, a novel ZnFe2O4-loaded porous biochar (RZF) with a high surface area of 1065 m2/g was synthesized via one-step carbonation activation of kitchen leftover rice with ZnCl2 and FeCl3 as activators. The optimized RZF-500-1:1 was obtained by rationally adjusting the activation ratio (the mass ratio of leftover rice and ZnFe2O4) and pyrolysis temperature. Such RZF-500-1:1 delivered high-performance H2S removal with the breakthrough capacity up to 228.29 mg/g at 25 °C, whilst the inactivated biochar (carbonization without activator) only showed a much lower adsorption capacity at circa 12.11 mg/g of H2S. The desulfurization conditions had a significant effect on the H2S breakthrough capacity, and the adsorbent exhibited better desulfurization performance at room temperature and in the presence of oxygen. The desulfurization mechanism on the ZnFe2O4-loaded biochar was proposed to be an adsorption-catalytic oxidation coupled process. Moreover, the as-fabricated sample showed high regeneration ability, retaining 91.6% of the initial breakthrough capacity after five regeneration cycles. This novel one-step preparation method would permit a gain of time and energy to obtain efficient activated carbons intended to capture H2S.

KW - Adsorption

KW - Biochar

KW - HS removal

KW - Leftover rice

KW - One-step synthesis

KW - ZnFeO

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DO - 10.1016/j.seppur.2021.119686

M3 - Article

AN - SCOPUS:85114764788

VL - 279

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JF - Gas Separation and Purification

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