A Membrane Separation Process for Biodiesel Purification

摘要: In the production of biodiesel via transesterification vegetable oils, purification to international standards is challenging. A key measure quality level free glycerol in biodiesel. order remove from fatty acid methyl ester (FAME or biodiesel), a membrane separation setup was tested. The main objective this thesis develop process for dispersed FAME after completion reaction and investigate effect different factors on removal. These included pore size, pressure, temperature, methanol, soap water content. First, study materials present reaction, such as water, soap, final performed using modified polyacrylonitrile (PAN) membrane, with 100 kD (ultrafiltration) molecular weight cut off all runs at 25°C. Results showed low concentrations had considerable removing FAME. mechanism due removal an ultrafine glycerol-rich phase untreated (or raw) size droplets both increased increasing content FAME. Next, three types polymeric membranes ultrafiltration range off, were tested fixed operating pressures temperatures (0, 5 25oC) reactor effluent. ASTM standard concentration met experiments results indicate that could be separated raw meet EN methanol feed up 3 mass%. demonstrated rely formation dynamic polar layer surface. Ceramic sizes (0.05 µm (ultrafiltration (UF) range) 0.2 (microfiltration (MF) range)) used treat directly set 0, encouraging 0.05 highest temperature (25°C). evident its relation factor (CF). Higher promoted achievement appropriate CF value sooner faster separation. Membrane also found affect performance. A subsequent revealed variables light scattering (DLS). parameter use technology influence other components soaps droplet size. suspended was…