Fuel Properties Determination
The cloud point (CP), cold filter-plugging point (CFPP), and pour point (PP) are crucial indexes of the cold flow properties of biodiesel blends. CP is the temperature at which the wax crystal size increases to 0.5 µm, and fuel becomes cloudy at this temperature. CFPP is the maximum temperature at which the 20 mL test oil fails to pass through the specified strainer at a specified pressure and a certain cooling temperature. PP is the highest temperature at which fuel, which uses a predetermined certain experimental condition measured oil, loses its fluidity. Therefore, in this study, CP, CFPP, and PP were measured in accordance with standard methods ASTM D2500, ASTM D6371, and ASTM D5949. The measurement is rounded to the nearest whole degree (°C), and three measurements are averaged.
Other fuel properties, such as kinematic viscosity, acid value, density, and flash point, are also important for BWCO and diesel. These fuel physicochemical characteristics are determined using the test methods in Table 1.