Process compatible desulfurization of NSP cement production: A novel strategy for efficient capture of trace SO2 and the industrial trial

Tongsheng Zhang; Hui Peng; Chang Wu; Yiqun Guo; Jiawei Wang; Xinzhi Chen; Jiangxiong Wei; Qijun Yu

doi:10.1016/j.jclepro.2023.137344

Process compatible desulfurization of NSP cement production: A novel strategy for efficient capture of trace SO2 and the industrial trial

Tongsheng Zhang, Hui Peng, Chang Wu, Yiqun Guo, Jiawei Wang, Xinzhi Chen, Jiangxiong Wei^*, Qijun Yu

^*Corresponding author for this work

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

Abstract

Cement industry contributes to more and more SO₂ emission due to utilization of alternative raw materials and fuels, whereas the available calcium-based dry flue gas desulfurization (FGD) technologies present low efficiency due to slow reversible de-SO₂ reactions and short gas-solid contact time in the preheater. In the present study, the SO₂ capture potentials of CaCO₃, CaO, and Ca(OH)₂ in the preheater environment were maximized by introducing V₂O₅-based catalyst and selecting optimal reaction temperature, and the de-SO₂ mechanism was extensively discussed. The results showed that the de-SO₂ efficiency of calcium-based adsorbents increased by 10–57 times as SO₂ was effectively oxidized to SO₃ in the presence of V₂O₅-based catalyst, then maximum de-SO₂ efficiency of 75.5% was achieved using Ca(OH)₂ and V₂O₅-CeO₂ at 600 °C. Furthermore, CaCO₃ assisted by V₂O₅-CeO₂ also had a de-SO₂ efficiency of 65.6%. Subsequently, a novel process compatible FGD technology was designed to maximize the de-SO₂ ability of raw meal in the preheater by adding V₂O₅-based catalyst and humidification, the SO₂ concentration of flue gas reduced from 1000 mg/Nm³ to less than 100 mg/Nm³ in the industrial-scale trial, as more sulfur was solidified into clinker in the form of alkali sulfate without reducing its properties. This novel process compatible de-SO₂ strategy is of real significance for reducing SO₂ emission of cement industry at low economic cost.

Original language	English
Article number	137344
Number of pages	16
Journal	Journal of Cleaner Production
Volume	411
Early online date	28 Apr 2023
DOIs	https://doi.org/10.1016/j.jclepro.2023.137344
Publication status	Published - 20 Jul 2023

Bibliographical note

Copyright © 2023 Elsevier Ltd. This accepted manuscript version is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License [https://creativecommons.org/licenses/by-nc-nd/4.0/].

Funding Information:
This work was funded by the National Natural Science Foundation of China (No. 51872096 & 52122201 ) and the Guangdong Science and Technology Program ( 2016A020221009 & 2021A0505030008 ). Their financial supports are gratefully acknowledged.

Keywords

Calcium-based adsorbents
Catalyst-assisted SO capture
NSP cement Production
Process compatible desulfurization
SO

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10.1016/j.jclepro.2023.137344

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title = "Process compatible desulfurization of NSP cement production: A novel strategy for efficient capture of trace SO2 and the industrial trial",

abstract = "Cement industry contributes to more and more SO2 emission due to utilization of alternative raw materials and fuels, whereas the available calcium-based dry flue gas desulfurization (FGD) technologies present low efficiency due to slow reversible de-SO2 reactions and short gas-solid contact time in the preheater. In the present study, the SO2 capture potentials of CaCO3, CaO, and Ca(OH)2 in the preheater environment were maximized by introducing V2O5-based catalyst and selecting optimal reaction temperature, and the de-SO2 mechanism was extensively discussed. The results showed that the de-SO2 efficiency of calcium-based adsorbents increased by 10–57 times as SO2 was effectively oxidized to SO3 in the presence of V2O5-based catalyst, then maximum de-SO2 efficiency of 75.5% was achieved using Ca(OH)2 and V2O5-CeO2 at 600 °C. Furthermore, CaCO3 assisted by V2O5-CeO2 also had a de-SO2 efficiency of 65.6%. Subsequently, a novel process compatible FGD technology was designed to maximize the de-SO2 ability of raw meal in the preheater by adding V2O5-based catalyst and humidification, the SO2 concentration of flue gas reduced from 1000 mg/Nm3 to less than 100 mg/Nm3 in the industrial-scale trial, as more sulfur was solidified into clinker in the form of alkali sulfate without reducing its properties. This novel process compatible de-SO2 strategy is of real significance for reducing SO2 emission of cement industry at low economic cost.",

keywords = "Calcium-based adsorbents, Catalyst-assisted SO capture, NSP cement Production, Process compatible desulfurization, SO",

author = "Tongsheng Zhang and Hui Peng and Chang Wu and Yiqun Guo and Jiawei Wang and Xinzhi Chen and Jiangxiong Wei and Qijun Yu",

note = "Copyright {\textcopyright} 2023 Elsevier Ltd. This accepted manuscript version is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License [https://creativecommons.org/licenses/by-nc-nd/4.0/]. Funding Information: This work was funded by the National Natural Science Foundation of China (No. 51872096 & 52122201 ) and the Guangdong Science and Technology Program ( 2016A020221009 & 2021A0505030008 ). Their financial supports are gratefully acknowledged. ",

year = "2023",

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doi = "10.1016/j.jclepro.2023.137344",

language = "English",

volume = "411",

journal = "Journal of Cleaner Production",

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TY - JOUR

T1 - Process compatible desulfurization of NSP cement production: A novel strategy for efficient capture of trace SO2 and the industrial trial

AU - Zhang, Tongsheng

AU - Peng, Hui

AU - Wu, Chang

AU - Guo, Yiqun

AU - Wang, Jiawei

AU - Chen, Xinzhi

AU - Wei, Jiangxiong

AU - Yu, Qijun

N1 - Copyright © 2023 Elsevier Ltd. This accepted manuscript version is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License [https://creativecommons.org/licenses/by-nc-nd/4.0/]. Funding Information: This work was funded by the National Natural Science Foundation of China (No. 51872096 & 52122201 ) and the Guangdong Science and Technology Program ( 2016A020221009 & 2021A0505030008 ). Their financial supports are gratefully acknowledged.

PY - 2023/7/20

Y1 - 2023/7/20

N2 - Cement industry contributes to more and more SO2 emission due to utilization of alternative raw materials and fuels, whereas the available calcium-based dry flue gas desulfurization (FGD) technologies present low efficiency due to slow reversible de-SO2 reactions and short gas-solid contact time in the preheater. In the present study, the SO2 capture potentials of CaCO3, CaO, and Ca(OH)2 in the preheater environment were maximized by introducing V2O5-based catalyst and selecting optimal reaction temperature, and the de-SO2 mechanism was extensively discussed. The results showed that the de-SO2 efficiency of calcium-based adsorbents increased by 10–57 times as SO2 was effectively oxidized to SO3 in the presence of V2O5-based catalyst, then maximum de-SO2 efficiency of 75.5% was achieved using Ca(OH)2 and V2O5-CeO2 at 600 °C. Furthermore, CaCO3 assisted by V2O5-CeO2 also had a de-SO2 efficiency of 65.6%. Subsequently, a novel process compatible FGD technology was designed to maximize the de-SO2 ability of raw meal in the preheater by adding V2O5-based catalyst and humidification, the SO2 concentration of flue gas reduced from 1000 mg/Nm3 to less than 100 mg/Nm3 in the industrial-scale trial, as more sulfur was solidified into clinker in the form of alkali sulfate without reducing its properties. This novel process compatible de-SO2 strategy is of real significance for reducing SO2 emission of cement industry at low economic cost.

AB - Cement industry contributes to more and more SO2 emission due to utilization of alternative raw materials and fuels, whereas the available calcium-based dry flue gas desulfurization (FGD) technologies present low efficiency due to slow reversible de-SO2 reactions and short gas-solid contact time in the preheater. In the present study, the SO2 capture potentials of CaCO3, CaO, and Ca(OH)2 in the preheater environment were maximized by introducing V2O5-based catalyst and selecting optimal reaction temperature, and the de-SO2 mechanism was extensively discussed. The results showed that the de-SO2 efficiency of calcium-based adsorbents increased by 10–57 times as SO2 was effectively oxidized to SO3 in the presence of V2O5-based catalyst, then maximum de-SO2 efficiency of 75.5% was achieved using Ca(OH)2 and V2O5-CeO2 at 600 °C. Furthermore, CaCO3 assisted by V2O5-CeO2 also had a de-SO2 efficiency of 65.6%. Subsequently, a novel process compatible FGD technology was designed to maximize the de-SO2 ability of raw meal in the preheater by adding V2O5-based catalyst and humidification, the SO2 concentration of flue gas reduced from 1000 mg/Nm3 to less than 100 mg/Nm3 in the industrial-scale trial, as more sulfur was solidified into clinker in the form of alkali sulfate without reducing its properties. This novel process compatible de-SO2 strategy is of real significance for reducing SO2 emission of cement industry at low economic cost.

KW - Calcium-based adsorbents

KW - Catalyst-assisted SO capture

KW - NSP cement Production

KW - Process compatible desulfurization

KW - SO

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M3 - Article

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JO - Journal of Cleaner Production

JF - Journal of Cleaner Production

M1 - 137344

ER -

Process compatible desulfurization of NSP cement production: A novel strategy for efficient capture of trace SO2 and the industrial trial

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Keywords

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