پديد آورنده :
شعباني، ندا
عنوان :
بررسي آزمايشگاهي جذب دي اكسيد كربن در نانو سيال سيليكا -آمين و نانو سيال آلومينا - آمين
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي شيمي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
سيزده،83ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محسن نصر اصفهاني
استاد مشاور :
نسرين اعتصامي
توصيفگر ها :
جذب گاز , ضريب انتقال جرم حجمي , نانو ذرات سيليكا و آلومينا , متيل دي اتانول آمين , پايپرازين , راكتور همزن دار
تاريخ نمايه سازي :
24/4/92
استاد داور :
احمد محب، مسعود حق شناس
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
87 Experimental Investigation of CO2 Absorption in Nanosilica Amine and NanoAlumina Amine Neda Shabany n shabani@cc iut ac ir Date of Submission Jan 15 2013 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M sc Language Farsi Supervisor Mohsen Nasr Esfahany mnasr@cu iut ac ir Abstract The removal of carbon dioxide from process gas streams is an important step in many industrial processes for a number of technical economical or environmental reasons In the presence of water CO2 being an acid gas can cause corrosion to process equipment Besides this the presence of CO2 reduces the heating value of a natural gas stream and also wastes valuable pipeline capacity The conventional technology to capture CO2 on large scale is the absorption desorption process in which aqueous solutions of alkanolamines are frequently used as solvents Nowadays the addition of an activator or more specifically piperazine PZ to an aqueous N methyldiethanolamine MDEA solution has found widespread application in the bulk removal of carbon dioxide More generally the localization of the mass transfer resistance to the interfacial region presents a problem in the intensification of most multiphase contacting processes in the chemical and biochemical industries since effective strategies have to work in this micronthin region Conventional methods for improving the rate which rely on intensifying mixing or turbulence in the bulk of the phase or phases involved therefore have inherent limitations Thus in recent years there has had been some interest in the potential of nanofluids to influence mass transfer rates In this work absorption of carbon dioxide into an aqueous MDEA PZ H2O was investigated in a stirred vessel at 101 3 kPa to measure the absorption rate and volumetric mass transfer coefficient of CO2 Effect of different parameters such as temperature gas flow rate amine concentration type of nanopartices silica and alumina nanoparticle concentration and agitation rate on mass transfer rate were investigated The concentration of nanoparticles was in the range of 0 0001 0 03 v v The volumetric liquid side mass transfer coefficient kLa of CO2 was estimated by using film theory The results show maximum enhanced absorption rates of 42 53 and 35 22 for SiO2 and Al2O3 particles compared to base solution respectively It is also found that SiO2 nanoparticle is a better candidate than Al2O3 nanoparticle and 0 001 vol of nanoparticles is an optimum concentration for CO2 absorption enhancement for the present experimental conditions The nanoparticles suspended in the base fluid cover the bubble and as the movement of the fluid due to external forces becomes more dynamic the particles collide with the gas liquid interface breaking the bubble into smaller size bubbles More bubbles mean a larger interfacial area which would promote the mass transfer from the gas to the liquid Addition of nanoparticles to the base solution decreases the surface tension of fluid which causes larger interfacial area Keywords Volumetric mass transfer coefficient carbon dioxide agitated vessel amine solution nanoparticles nanofluids PDF created with pdfFactory trial version www pdffactory com
استاد راهنما :
محسن نصر اصفهاني
استاد مشاور :
نسرين اعتصامي
استاد داور :
احمد محب، مسعود حق شناس
