پژوهش نفت

پژوهش نفت

تهیه و مشخصه‌یابی غشای مرکب پلی دی متیل سیلوکسان PDMS بر پایۀ چارچوب فلز-آلی UiO-66 به‌منظور استفاده در فرآیند گوگردزدایی از بنزین به‌روش تراوش تبخیری

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران، ایران
2 دانشکده مهندسی شیمی و نفت و گاز، دانشگاه علم و صنعت، تهران، ایران
چکیده
در این پژوهش، از روش غشایی تراوش تبخیری برای گوگردزدایی از بنزین استفاده شده است. از تیوفن به‌عنوان معرف گوگرد و از نرمال هپتان به‌عنوان معرف ترکیبات هیدروکربنی در بنزین استفاده شد. غشاهای کامپوزیتی زمینه مرکب با لایة فعال پلی دی متیل سیلوکسان حاوی نانوذرات چارچوب فلز- آلی UiO-66 بر پایة غشای متخلخل پلی ونیلیدن فلوراید ساخته شد. از آزمون‌های میکروسکوپ الکترونی روبشی، طیف فروسرخ تبدیل فوریه، و پراش پرتوی ایکس برای مشخصه‌یابی نانوذرات و غشاهای سنتز شده استفاده شد. اثر افزودن نانوذرات برروی عملکرد غشاها در فرآیند تراوش تبخیری بررسی گردید. عملکرد بهینه برای غشاها حالتی است که درصد وزنی UiO-66 نسبت به پلی دی متیل سیلوکسان wt.% 8% باشد که در این حالت شار kg/m2 h 73/10 و فاکتور تغلیظ 96/3 می‌باشد که در مقایسه با حالت غشای پلی دی متیل سیلوکسان خام، شار 90% و فاکتورتغلیظ 27% افزایش یافته است.
 
کلیدواژه‌ها

عنوان مقاله English

Preparation and Characterization of Mixed-matrix Composite PDMS Membrane Based on UiO-66 Metal-organic Framework for the Desulfurization of Gasoline by Pervaporation Method

نویسندگان English

Hamid Heydari Pebdeni 1
Zahra Moradi 2
Seyyed Abbas Musavi 1
1 Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
2 Department of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran
چکیده English

In this study, the pervaporation method was used for the desulfurization of gasoline. Thiophene was used as a sulfur agent and n-heptane as a representative of hydrocarbon compounds in gasoline. Hybrid membranes were fabricated with active layers composed of polydimethylsiloxane (PDMS) and metal-organic framework UiO-66, together with support layers composed of polyvinylidene fluoride (PVDF). Scanning electron microscopy (SEM), Fourier transform infrared spectrum (FTIR) and X-ray diffraction (XRD) were used to characterize nanoparticles and synthesized membranes. Furthermore, the effect of UiO-66 incorporation on swelling and pervaporation performance of the hybrid membranes was evaluated. The optimal performance was achieved when the weight fraction of UiO-66 to PDMS was 8% with a flux of 10.73 kg.m-2h-1 (increased by 90% compared with the PDMS control membrane) and an enrichment factor of 3.96 (increased by 27% compared with the PDMS control membrane).
 

کلیدواژه‌ها English

Pervaporative Desulfurization
Mix-Matrix Membrane
Metal-Organic Framework
PDMS Membrane
UiO-66 Nanoparticle
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