Experimental and theoretical investigation of CO_(2) mass transfer enhancement of silica nanoparticles in water
作者机构：School of Chemical and Petroleum EngineeringShiraz UniversityShiraz***Iran Department of Chemical and Petroleum EngineeringSchool of Chemical and Petroleum EngineeringEnhanced Oil and Gas Recovery InstituteAdvanced Research Group for Gas Condensate RecoveryShiraz UniversityShiraz***Iran
出 版 物：《Petroleum Research》 (石油研究（英文）)
年 卷 期：2018年第3卷第4期
页 面：370-380页
核心收录：
学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 08[工学] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0818[工学-地质资源与地质工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0816[工学-测绘科学与技术]
基 金：The authors are grateful to the Shiraz University for supporting this research.
主 题：Nanofluid Mass transfer enhancement Carbon dioxide Diffusion coefficient Brownian motion
摘 要：Nanofluids have novel characteristics that make them potentially useful for different applications.Realizing modest mass transfer enhancement in conventional nanofluids,in this study,mass-transfer of carbon dioxide in pure water and water-based nanofluids dispersed with silica nanoparticles at different initial pressures up to 15 MPa and at temperatures of 35℃ and 45℃ was investigated.Deionized water and two nanofluids at different concentrations with volume of 150 cm^(3) were used for this purpose.CO_(2) was brought in contact with each solution in a pressure-volume-temperature(PVT)cell with no mixer.Additionally,carbon dioxide diffusion coefficients at different pressures were estimated based on Fick s law.The obtained results demonstrated that water/silica nanofluid with 0.5 wt%and 0.1 wt%increased the carbon dioxide diffusion coefficient up to 39.2%and 11.9%compared to that in pure distilled water,respectively.Moreover,it was observed that the measured diffusion coefficient of carbon dioxide inwater increased with temperature rise from 35℃ to 45℃ at constant pressure.However,it could be seen that,the diffusion coefficient decreased with pressure at constant temperature.It was concluded that among the enhancement mechanisms of nanoparticles,(i.***.grazing effect and Brownian motion),Brownian motion would play the main role in mass transfer enhancement.
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