آی اس آی پیپر

دانلود رایکان مقاله انگلیسی ISI با موضوع تفکیک بیودیزل و گلیسرول

عنوان فارسی مقاله:

تفکیک بیودیزل و گلیسرول با استفاده از غشاهای سرامیکی

عنوان انگلیسی مقاله:

Separation of biodiesel and glycerol using ceramic membranes

دانلود رایگان مقاله ISI با فرمت PDF:

مشاهده توضیحات کامل و خرید ترجمه فارسی با فرمت ورد تایپ شده:

بخشی از مقاله انگلیسی :

4. Conclusions

A new separation route using membranes to obtain biodiesel with minimum free glycerol content was proposed. Ceramic membranes with pore diameters of 0.2, 0.4, and 0.8 m separated biodiesel and glycerol efficiently. The preliminary results demonstrated the potential of this technology to improve the process of separation of biodiesel. The applied transmembrane pressure proved to be an extremely important variable in the microfiltration of biodiesel. Values over 2.0 bar reduced the retention of glycerol. For the three investigated membranes, the highest stable permeate flux was obtained at 2.0 bar. The best performance was that of the membrane with pore diameter of 0.2 m at 2.0 bar, which gave a stable permeate flux of 78.4 kg/h m2 and glycerol retention of 99.4%. The concentration of ethanol in the feed mixture submitted to microfiltration affected the behavior of the emulsion so that a higher concentration of ethanol led to a lower retention of glycerol. The glycerol content in the permeate for 20% ethanol was four-fold that for the lowest ethanol concentration. In conclusion, a 5% ethanol percent mass in the feed submitted to microfiltration with a 0.2-m pore diameter membrane gave the best results, with a stable permeate flux of 63.1 kg/h m2 and glycerol retention of 99.6%.