01 مهر 1400
احمد آذري

احمد آذری

مرتبه علمی: دانشیار
نشانی: دانشکده مهندسی نفت، گاز و پتروشیمی - گروه مهندسی شیمی
تحصیلات: دکترای تخصصی / مهندسی شیمی
تلفن: 07733441913
دانشکده: دانشکده مهندسی نفت، گاز و پتروشیمی

مشخصات پژوهش

عنوان Measurement and correlation for CO2 mass diffusivity in various metal oxide nanofluids
نوع پژوهش مقالات در نشریات
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مجله Journal of Environmental Chemical Engineering
شناسه DOI
پژوهشگران پیمانه دهقان (نفر اول) ، احمد آذری (نفر دوم) ، رضا آذین (نفر سوم)

چکیده

Mass diffusivity of CO2 in different nanofluids was estimated by a designed measurement set up. For conducting diffusion tests, water-based nanofluids, including silicon oxide (SiO2), aluminum oxide (Al2O3), and titanium oxide (TiO2) with concentrations of 0.05, 0.1, and 0.2?wt% were prepared and characterized by dynamic light scattering analysis. The Effects of operational parameters, namely, the temperature, weight percentage of nanoparticles, and size of nanoparticles on CO2 diffusivity, were investigated by pressure decay measurement in a diffusion cell. According to the results of experiments, the most diffusivity improvement was related to TiO2 nanofluid (25?nm) at 0.1?wt% and 35?°C that CO2 diffusivity reached 14.7?×?10?9?m2s?1 which is about four times higher than that of pure water. In this study, a new correlation was developed for the effective diffusivity of CO2 in water-based nanofluid according to the nanoparticles Reynolds number, nanofluids Schmidt number, and nanofluids concentration. The correlation predicted CO2 diffusivity with an average relative error percent of 9.58 % and a correlation coefficient (R2) of 0.945.