کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11003325 | 1456911 | 2019 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
CO2 absorption enhancement by water-based nanofluids of CNT and SiO2 using hollow-fiber membrane contactor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, CO2 absorption enhancement using nanofluids in a gas-liquid hollow fiber membrane contactor (HFMC) was conducted through a 2D mathematical model. The model was developed by considering molecular diffusion in radial and axial directions as well as non-wetting condition. CO2 absorption was conducted from a gas mixture, containing CO2 and air, which flows in the shell. Also, absorbents which are containing CNT and SiO2 nanoparticles flow in tube side counter-currently. The effect of nanoparticles was considered by taking two prominent mechanisms for mass transfer enhancement in nanofluids; i.e., Brownian motion and Grazing effect. Model predictions compared with experimental results and excellent agreement was found. The simulation results indicated that introducing 0.05â¯wt.% SiO2 nanoparticles enhanced absorption rate up to 16%. CNT because of high adsorption capacity and hydrophobicity showed much better performance than the SiO2 nanoparticles, so that introducing 0.05â¯wt.% CNT enhanced the absorption rate up to 34%. For better performance of nanoparticle in the absorbent, there is an optimal loading which is 0.03 and 0.04â¯wt.% for SiO2 and CNT, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 210, 8 February 2019, Pages 920-926
Journal: Separation and Purification Technology - Volume 210, 8 February 2019, Pages 920-926
نویسندگان
Mashallah Rezakazemi, Mohammad Darabi, Ebrahim Soroush, Mohammad Mesbah,