عنوان :
بررسي شيمي فيزيكي پايداري افرون هاي كلوئيدي گازي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي شيمي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
پانزده،87ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمد چالكش اميري
استاد مشاور :
مسعود بهشتي
توصيفگر ها :
نونيل فنل اتوكسيلات -20 , منحني تخليه , مشخصات هندسي دستگاه مولد افرون , قطر ديسك دوار , موقعيت بافل
تاريخ نمايه سازي :
14/2/93
استاد داور :
علي اكبر دادخواه، احمد اسدي نژاد
چكيده انگليسي :
88 Study of physical chemical on stability of colloidal gas aphrons Mohammad Fathi Mohammad fathi@ce iut ac ir January 18 2014 Department of chemical engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor s Dr Mohammad Chalkosh Amiri amir33@cc iut ac irAbstractAphrons are dispersed micron sized bubbles in a liquid These fine bubbles are produced by using a veryhigh shear rate into of a surfactant solution Colloidal gas aphrons CGAs relatively stable dispersion butfinally they gradually losing their stability and they separate into a clear liquid phase and a foamy phase Characterization of aphrons is necessary for getting better knowledge on their performance Two mostimportant features of CGAs are their micron sizes and relative high stability These features resulted innumerous applications for aphrons Study on the effect of geometric specifications of Aphron Generator onCGA stability is very limited In this thesis the effect of different baffle positions and various diameters ofrotating disk of Aphron generator on stability of generated Aphron bubbles have been investigated Also acomparison was made between various surfactants and finally the Nonyl Phenol Ethoxylate 20 a localproduct nonionic surfactant was introduced Changing in geometric specifications of aphron generatorreveal some unpublished results on aphrons behavior This work is an attempt to show that the macroscopicCGAs behavior due to geometric specifications of Aphron generator can be realized from drainage curve The results showed that a Rotating disc diameter and baffle position effect on stability and the effective gasvolume fraction but these effects decrease with increasing the stirring time and surfactant concentration b Increasing the surfactant concentration can always increase the stability of Aphrons at the second phase ofdrainage curve c Under any circumstances the increase in the surfactant concentration leads to an increasein the gas volume fraction in CGA Key wordsCGA stability NPE 20 curve drainage geometric specifications of Aphron Generator disc diameter baffle position
استاد راهنما :
محمد چالكش اميري
استاد مشاور :
مسعود بهشتي
استاد داور :
علي اكبر دادخواه، احمد اسدي نژاد
