气候变化领域集成服务门户(CCPortal): Template-Free Synthesis of Hollow CaO/Ca2SiO4Nanoparticle as a Cyclically Stable High-Capacity CO2Sorbent

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DOI	10.1021/acssuschemeng.0c07689
	Template-Free Synthesis of Hollow CaO/Ca2SiO4Nanoparticle as a Cyclically Stable High-Capacity CO2Sorbent
	Huang C.; Xu M.; Huai X.; Liu Z.
发表日期	2021
ISSN	21680485
起始页码	2171
结束页码	2179
卷号	9 期号:5
英文摘要	Cyclically stable and highly effective CaO-based CO2 sorbents are crucial to calcium looping, which is a CO2-capture technique that offers an effective and feasible way to achieve the goal of carbon neutrality. With the goal of enhancing CO2-capture performance, a template-free synthetic route was reported in this work on the basis of the Kirkendall effect that yields hollow, Ca2SiO4-stabilized CaO nanoparticles. The hollow CaO/Ca2SiO4 nanoparticle features thin, nanometer-scale shells, large surface area, and a homogeneous elemental distribution, which are essential characteristics for high-performance CO2 sorbents. The synthetic sorbent with 10 mol % SiO2 offers superior and durable CO2 uptake during calcium looping. The capacity of CO2 capture of the synthetic sorbents still maintains 0.573 gCO2/gsorbent after the 20th cycle, exceeding that of other substances such as CaO/SiO2 synthesized via mechanical blending and CaCO3-derived sorbents by 195% and 290%, respectively. Detailed X-ray diffraction, N2 adsorption/desorption, transmission electron microscopy, and scanning electron microscopy analyses confirm that the unique hollow structure and thin shell of CaO/Ca2SiO4 nanoparticles are retained after the adsorption-desorption cycles. These results thus present an approach to obtain hollow nanostructured sorbents with better CO2 uptake performance, all without using templates or a high-temperature, long-term hydrothermal approach. © 2021 American Chemical Society.
英文关键词	CaO-based sorbents; CO2capture; Cycling stability; Hollow CaO/Ca2SiO4; Kirkendall effect
scopus关键词	Blending; Calcite; Calcium; Calcium carbonate; Calcium oxide; Calcium silicate; Carbon dioxide; High resolution transmission electron microscopy; Nanoparticles; Scanning electron microscopy; Silica; Silicon; Synthesis (chemical); Adsorption-desorption cycles; Carbon neutralities; Elemental distribution; Essential characteristic; Kirkendall effects; Large surface area; Mechanical blending; Synthetic sorbents; Sorbents
来源期刊	ACS Sustainable Chemistry and Engineering
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177112
作者单位	Institute of Engineering Thermophysics, Chinese Academy of Sciences, 11 North Fourth Ring Road West, Beijing, 100190, China; University of Chinese Academy of Sciences, 19 Yuquan Road (A), Beijing, 100049, China; Nanjing Institute of Future Energy System, Institute of Engineering Thermophysics, Chinese Academy of Sciences, 266 Chuangyan Road, Nanjing, 211135, China
推荐引用方式 GB/T 7714	Huang C.,Xu M.,Huai X.,et al. Template-Free Synthesis of Hollow CaO/Ca2SiO4Nanoparticle as a Cyclically Stable High-Capacity CO2Sorbent[J],2021,9(5).
APA	Huang C.,Xu M.,Huai X.,&Liu Z..(2021).Template-Free Synthesis of Hollow CaO/Ca2SiO4Nanoparticle as a Cyclically Stable High-Capacity CO2Sorbent.ACS Sustainable Chemistry and Engineering,9(5).
MLA	Huang C.,et al."Template-Free Synthesis of Hollow CaO/Ca2SiO4Nanoparticle as a Cyclically Stable High-Capacity CO2Sorbent".ACS Sustainable Chemistry and Engineering 9.5(2021).