The phase equilibrium behavior of icy bodies' surface mixtures:The simulation of the methane + acetonitrile system on Titan

IF 2.5 2区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Icarus Pub Date : 2025-01-19 DOI:10.1016/j.icarus.2025.116460

Marco Campestrini , Nicolas Gassies , Céline Houriez , Michel Masella , Paolo Stringari

{"title":"The phase equilibrium behavior of icy bodies' surface mixtures:The simulation of the methane + acetonitrile system on Titan","authors":"Marco Campestrini , Nicolas Gassies , Céline Houriez , Michel Masella , Paolo Stringari","doi":"10.1016/j.icarus.2025.116460","DOIUrl":null,"url":null,"abstract":"<div><div>Titan's surface has a hydrological system based on methane. The interaction of solar ultraviolet radiation and energetic particles from Saturn's magnetosphere results in the creation of nitrogen-containing molecules. When these molecules dissolve in Titan's seas, it could represent the initial step of complex organic chemistry processes. Of particular interest is acetonitrile, which has been detected in the atmosphere as a gas and potentially as ice on the surface. Despite the importance of knowing the phase equilibrium behavior of methane and acetonitrile for understanding the physical and chemical phenomena occurring on Titan's surface, no data exist for this binary mixture. This article presents the first experimental study of phase equilibrium behavior for the binary mixture methane + acetonitrile. In particular, vapor-liquid equilibrium (T, P, x, y) data have been obtained from 223.26 to 293.09 K and for pressures up to about 10 MPa. These data have allowed regressing the parameters of an equation of state for the representation of the fluid phases of the mixture. The equation of state has been used in the classical approach framework for predicting the phase equilibrium behavior of the methane + acetonitrile mixture at temperature and pressure conditions of interest for studying the phenomena occurring on Titan's surface. Some results have also been obtained with molecular dynamics techniques for the vapor-liquid equilibrium of the binary mixture, at low pressure.</div></div>","PeriodicalId":13199,"journal":{"name":"Icarus","volume":"429 ","pages":"Article 116460"},"PeriodicalIF":2.5000,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Icarus","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0019103525000077","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}

引用次数: 0

Abstract

Titan's surface has a hydrological system based on methane. The interaction of solar ultraviolet radiation and energetic particles from Saturn's magnetosphere results in the creation of nitrogen-containing molecules. When these molecules dissolve in Titan's seas, it could represent the initial step of complex organic chemistry processes. Of particular interest is acetonitrile, which has been detected in the atmosphere as a gas and potentially as ice on the surface. Despite the importance of knowing the phase equilibrium behavior of methane and acetonitrile for understanding the physical and chemical phenomena occurring on Titan's surface, no data exist for this binary mixture. This article presents the first experimental study of phase equilibrium behavior for the binary mixture methane + acetonitrile. In particular, vapor-liquid equilibrium (T, P, x, y) data have been obtained from 223.26 to 293.09 K and for pressures up to about 10 MPa. These data have allowed regressing the parameters of an equation of state for the representation of the fluid phases of the mixture. The equation of state has been used in the classical approach framework for predicting the phase equilibrium behavior of the methane + acetonitrile mixture at temperature and pressure conditions of interest for studying the phenomena occurring on Titan's surface. Some results have also been obtained with molecular dynamics techniques for the vapor-liquid equilibrium of the binary mixture, at low pressure.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Icarus 地学天文-天文与天体物理

CiteScore

6.30

自引率

18.80%

发文量

356

审稿时长

2-4 weeks

期刊介绍： Icarus is devoted to the publication of original contributions in the field of Solar System studies. Manuscripts reporting the results of new research - observational, experimental, or theoretical - concerning the astronomy, geology, meteorology, physics, chemistry, biology, and other scientific aspects of our Solar System or extrasolar systems are welcome. The journal generally does not publish papers devoted exclusively to the Sun, the Earth, celestial mechanics, meteoritics, or astrophysics. Icarus does not publish papers that provide "improved" versions of Bode''s law, or other numerical relations, without a sound physical basis. Icarus does not publish meeting announcements or general notices. Reviews, historical papers, and manuscripts describing spacecraft instrumentation may be considered, but only with prior approval of the editor. An entire issue of the journal is occasionally devoted to a single subject, usually arising from a conference on the same topic. The language of publication is English. American or British usage is accepted, but not a mixture of these.