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The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO(2) Capture and Hydrogenation

Ni/CaO, a low-cost dual-functional material (DFM), has been widely studied for integrated CO(2) capture and hydrogenation. The core of this dual-functional material should possess both good CO(2) capture–conversion performance and structural stability. Here, we synthesized Ni/CaO DFMs modified with...

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Autores principales: Hu, Yong, Xu, Qian, Sheng, Yao, Wang, Xueguang, Cheng, Hongwei, Zou, Xingli, Lu, Xionggang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10420131/
https://www.ncbi.nlm.nih.gov/pubmed/37570134
http://dx.doi.org/10.3390/ma16155430
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author Hu, Yong
Xu, Qian
Sheng, Yao
Wang, Xueguang
Cheng, Hongwei
Zou, Xingli
Lu, Xionggang
author_facet Hu, Yong
Xu, Qian
Sheng, Yao
Wang, Xueguang
Cheng, Hongwei
Zou, Xingli
Lu, Xionggang
author_sort Hu, Yong
collection PubMed
description Ni/CaO, a low-cost dual-functional material (DFM), has been widely studied for integrated CO(2) capture and hydrogenation. The core of this dual-functional material should possess both good CO(2) capture–conversion performance and structural stability. Here, we synthesized Ni/CaO DFMs modified with alkali metals (Na, K, and Li) through a combination of precipitation and combustion methods. It was found that Na-modified Ni/CaO (Na-Ni/CaO) DFM offered stable CO(2) capture–conversion activity over 20 cycles, with a high CO(2) capture capacity of 10.8 mmol/g and a high CO(2) conversion rate of 60.5% at the same temperature of 650 °C. The enhanced CO(2) capture capacity was attributed to the improved surface basicity of Na-Ni/CaO. In addition, the incorporation of Na into DFMs had a favorable effect on the formation of double salts, which shorten the CO(2) capture and release process and promoted DFM stability by hindering their aggregation and the sintering of DFMs.
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spelling pubmed-104201312023-08-12 The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO(2) Capture and Hydrogenation Hu, Yong Xu, Qian Sheng, Yao Wang, Xueguang Cheng, Hongwei Zou, Xingli Lu, Xionggang Materials (Basel) Article Ni/CaO, a low-cost dual-functional material (DFM), has been widely studied for integrated CO(2) capture and hydrogenation. The core of this dual-functional material should possess both good CO(2) capture–conversion performance and structural stability. Here, we synthesized Ni/CaO DFMs modified with alkali metals (Na, K, and Li) through a combination of precipitation and combustion methods. It was found that Na-modified Ni/CaO (Na-Ni/CaO) DFM offered stable CO(2) capture–conversion activity over 20 cycles, with a high CO(2) capture capacity of 10.8 mmol/g and a high CO(2) conversion rate of 60.5% at the same temperature of 650 °C. The enhanced CO(2) capture capacity was attributed to the improved surface basicity of Na-Ni/CaO. In addition, the incorporation of Na into DFMs had a favorable effect on the formation of double salts, which shorten the CO(2) capture and release process and promoted DFM stability by hindering their aggregation and the sintering of DFMs. MDPI 2023-08-02 /pmc/articles/PMC10420131/ /pubmed/37570134 http://dx.doi.org/10.3390/ma16155430 Text en © 2023 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 Article
Hu, Yong
Xu, Qian
Sheng, Yao
Wang, Xueguang
Cheng, Hongwei
Zou, Xingli
Lu, Xionggang
The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO(2) Capture and Hydrogenation
title The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO(2) Capture and Hydrogenation
title_full The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO(2) Capture and Hydrogenation
title_fullStr The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO(2) Capture and Hydrogenation
title_full_unstemmed The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO(2) Capture and Hydrogenation
title_short The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO(2) Capture and Hydrogenation
title_sort effect of alkali metals (li, na, and k) on ni/cao dual-functional materials for integrated co(2) capture and hydrogenation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10420131/
https://www.ncbi.nlm.nih.gov/pubmed/37570134
http://dx.doi.org/10.3390/ma16155430
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