محمد مهدیارفر
پژوهشگاه صنعت نفت تهران
[ 1 ] - بررسی تاثیرات دمایی پیرولیز بر ضرایب نفوذ اکسیژن و نیتروژن در غربالهای مولکولی کربنی
جدا سازی و تخلیص گازها یکی از مهمترین فرایندهای صنعتی می باشد. در این مقاله، جذب و نفوذ اکسیژن و نیتروژن از میان جاذب های غربال مولکولی کربنی (CMS) که از پیرولیز رزین فنولی در سه دمای مختلف ℃ 500، ℃ 700 و ℃800 ساخته شده، مورد مطالعه قرار گرفت. نفوذ میکروپور اکسیژن و نیتروژن در این سه جاذب با کمک روش حجم سنجی در دستگاه جذب ناپیوسته، با استفاده از معادله نفوذ شامل حالتهای زمان کوتاه و زمان طولانی...
[ 2 ] - Pervaporation (PV) Separation of Methanol/Methyl Tert-butyl Ether Mixtures in Low Permeate Pressure Conditions
Recently, pervaporation separation processes have gained much attention in the separation of azeotropic and close boiling point organic-organic mixtures due to its high separation efficiency, economy, safety, and energy saving potentials. In this work, the effects of experimental factors such as feed composition and operating temperature on the performance of a commercial poly vinyl alcohol mem...
[ 3 ] - Effects of Permeate Pressure and Feed Flow Rate on Benzene Dehydration by Pervaporation
Membrane-based pervaporation (PV) has attracted much attention in the dehydration of organic solvents. Permeate pressure and feed flow rate are two important parameters, which affect membrane performance in pervaporation. The effects of these two parameters on the performance of a commercial poly (vinyl alcohol) membrane in the dehydration of benzene have been investigated in this work. The exp...
[ 4 ] - Influences of Permeate Pressure and Feed Flow Rate on Benzene Removal from Gasoline by Pervaporation
In this work, the effects of permeate pressure and feed flow rate on the performance of a composite polyvinyl alcohol (PVA) membrane in the removal of benzene from gasoline by pervaporation (PV) were evaluated. The results indicate the remarkable effect of permeate pressure on membrane performance as reducing permeate pressure (higher vacuum) from 30 to 3 mmHg causes the total flux to increase ...
[ 5 ] - EFFECT OF OPERATING CONDITIONS ON THE DEHYDRATION OF TOLUENE BY PERVAPORATION USING A POLYVINYL ALCOHOL MEMBRANE
The effects of operating parameters such as feed temperature and permeate-side pressure on the performance of a commercial PVA membrane in the dehydration of toluene by a pervaporation (PV) membrane system is studied in the present work. The results obtained indicate that increasing temperature in the range of 40 to 70 °C and reducing permeate pressure in the range of 1 to 10 mmHg increase memb...
[ 6 ] - Experimental and Theoretical Study on the CH4 Adsorption by Granular and Microporous Activated Carbon
Adsorbed natural gas (ANG) by Granular Activated Carbon (GAC) has been widely investigated as an alternative to CNG and LNG technologies for storage and transportation of natural gas. In the present work, a theoretical and experimental study was conducted to accurately determine the amount of adsorption of CH4 by GAC. To carry out the experiments, the volumetric method was used up to 4 MPa at c...
[ 7 ] - بررسی تجربی فرآیند ساخت غشاء کربنی بر روی پایههای سرامیکی با استفاده از رزین فنلی به عنوان ماده پیشتاز
در این پژوهش، نمونههایی از غشاءهای کربنی پایهدار با استفاده از رزین فنلی به عنوان ماده پیشتاز تهیه شد و اثر شرایط پوششدهی شامل نوع حلال، غلظت حلال و روش پوششدهی بر چگونگی تشکیل یک لایه بینقص از رزین بر روی پایه، مورد بررسی قرار گرفت. همچنین این لایه، تحت عملیات کربنیزه شدن قرار گرفت تا تبدیل به غشاء کربنی شود. به منظور بررسی اثر نوع پایه، دو نوع پایه با جنس و ساختار تخلخل متفاوت مورد استفا...
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