过渡金属氯化物水溶液中二氧化碳水合物形成的动力学分析

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS Greenhouse Gases: Science and Technology Pub Date : 2024-02-13 DOI:10.1002/ghg.2264
Fa-Ping Liu, Ai-Rong Li, Cheng Wang, Yu-Ling Ma
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引用次数: 0

摘要

二氧化碳水合物技术可用于海水淡化。然而,在含有无机盐的水溶液中,CO2 水合物形成的动力学受到抑制,而且不同金属阳离子和阴离子的无机盐形成 CO2 水合物的动力学机制仍不清楚。本研究对金属氯化物水溶液中 CO2 水合物的成核和生长进行了研究。由于过渡金属离子与水分子之间的配位键促进了临界晶核的形成,因此在 Ni2+、Mn2+、Zn2+ 和 Fe3+ 离子存在时,CO2 水合物成核的促进作用取代了 Na+ 和 K+ 离子。在含有 0.32 mol/L NaCl 的水溶液中,诱导时间增加了 61.1%,而在含有相同浓度 Cl- 阴离子的 FeCl3 水溶液中,诱导时间缩短了 55.6%。在 CO2 水合物的生长过程中,Cl- 离子比金属离子对 CO2 水合物笼子稳定性的影响更大。在 NaCl 存在的情况下,储气能力降低了 10.3%,低于其他金属氯化物。由于 Cl- 离子与水合物笼子中的水分子之间存在氢键,Cl- 阴离子被吸附在水合物表面并参与水合物笼子,从而抑制了水合物的生长。© 2024 化学工业协会和 John Wiley & Sons, Ltd. 保留所有权利。
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Kinetic analysis of CO2 hydrate formation in the aqueous solutions of transition metal chlorides

CO2 hydrate technology can be applied to seawater desalination. However, the kinetics of CO2 hydrate formation were inhibited in the aqueous solution with inorganic salts, and the kinetic mechanism of CO2 hydrate formation for inorganic salts with different metal cations and anions was still unclear. In this work, CO2 hydrate nucleation and growth were studied in aqueous solutions of metal chlorides. Instead of Na+ and K+ ions, CO2 hydrate nucleation was promoted in the presence of Ni2+, Mn2+, Zn2+ and Fe3+ ions due to the co-ordination bonds between transition metal ions and water molecules to enhance the formation of the critical crystal nuclei. The induction time was increased by 61.1% in aqueous solution with 0.32 mol/L NaCl, while it was shortened by 55.6% in FeCl3 aqueous solution at the same concentration of Cl anions. In the process of CO2 hydrate growth, Cl ions played a more important role than the metal ions in affecting the stability of CO2 hydrate cages. The gas storage capacity was reduced by 10.3% in the presence of NaCl, and was lower than that of other metal chlorides. Cl anions were absorbed on the hydrate surface and involved in hydrate cages to inhibit the hydrate growth due to the hydrogen bonds between the Cl ions and water molecules of the hydrate cages. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.

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来源期刊
Greenhouse Gases: Science and Technology
Greenhouse Gases: Science and Technology ENERGY & FUELS-ENGINEERING, ENVIRONMENTAL
CiteScore
4.90
自引率
4.50%
发文量
55
审稿时长
3 months
期刊介绍: Greenhouse Gases: Science and Technology is a new online-only scientific journal dedicated to the management of greenhouse gases. The journal will focus on methods for carbon capture and storage (CCS), as well as utilization of carbon dioxide (CO2) as a feedstock for fuels and chemicals. GHG will also provide insight into strategies to mitigate emissions of other greenhouse gases. Significant advances will be explored in critical reviews, commentary articles and short communications of broad interest. In addition, the journal will offer analyses of relevant economic and political issues, industry developments and case studies. Greenhouse Gases: Science and Technology is an exciting new online-only journal published as a co-operative venture of the SCI (Society of Chemical Industry) and John Wiley & Sons, Ltd
期刊最新文献
Issue Information Core-flooding experiments of various concentrations of CO2/N2 mixture in different rocks: II. Effect of rock properties on residual water Development of a multicomponent counter-current flow model to evaluate the impact of oxygen and water vapor on CO2 removal performance in a hollow fiber membrane contactor Invasion percolation & basin modelling for CCS site screening and characterization A study on degradation and CO2 capture performance of aqueous amino acid salts for direct air capture applications
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