气候变化领域集成服务门户(CCPortal): Rapid Formation of Clathrate Hydrate From Liquid Ethane and Water Ice on Titan

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DOI	10.1029/2019GL086265
	Rapid Formation of Clathrate Hydrate From Liquid Ethane and Water Ice on Titan
	Vu T.H.; Choukroun M.; Sotin C.; Muñoz-Iglesias V.; Maynard-Casely H.E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	Liquid ethane is present in the lakes and seas observed on Titan's surface by the Cassini-Huygens mission. While interaction between liquid hydrocarbons and water ice is expected to result in the formation of clathrate hydrates, such reaction (and its kinetics) has not yet been demonstrated for cryogenic liquids under relevant planetary conditions. In this paper, we report the first experimental evidence for rapid formation of clathrates upon direct contact of liquid ethane with water ice at 1 bar using micro-Raman spectroscopy. Kinetics experiments conducted in the temperature range 150–173 K yield an activation energy of 14.8 ± 2.2 kJ/mol, which is suggestive of a diffusion-controlled mechanism for clathrate formation. This implies that a clathrate reservoir can form within seasonal time scales on Titan if liquid ethane comes into contact with a pre-existing icy bedrock, which may hold important implications for the structure and dynamics of Titan's crust and its global evolution. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Activation energy; Ethane; Hydration; Ice; Liquids; Reaction kinetics; Reservoirs (water); Cassini-Huygens mission; Clathrate formation; Diffusion controlled mechanism; Experimental evidence; Kinetics experiments; Liquid hydrocarbons; Micro Raman Spectroscopy; Structure and dynamics; Hydrates; activation energy; bedrock; clathrate; ethane; experimental study; ice; reaction kinetics; temperature; Titan
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170716
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Centro de Astrobiología (CSIC-INTA), Torrejón de Ardoz, Spain; Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW, Australia
推荐引用方式 GB/T 7714	Vu T.H.,Choukroun M.,Sotin C.,et al. Rapid Formation of Clathrate Hydrate From Liquid Ethane and Water Ice on Titan[J],2020,47(4).
APA	Vu T.H.,Choukroun M.,Sotin C.,Muñoz-Iglesias V.,&Maynard-Casely H.E..(2020).Rapid Formation of Clathrate Hydrate From Liquid Ethane and Water Ice on Titan.Geophysical Research Letters,47(4).
MLA	Vu T.H.,et al."Rapid Formation of Clathrate Hydrate From Liquid Ethane and Water Ice on Titan".Geophysical Research Letters 47.4(2020).