Soapstock Utilized for Producing Biofuels by the Delayed Coking Apparatus

Abstract

Acidic oil made by acidification and extraction of soapstock was used to produce biofuel in delayed coking apparatus. Through two pre-heatings of acidic oil in delayed coking apparatus, when the temperature of the coking drum reached 460°C, the maximum yield of liquid oil (around 84%) was obtained, whereas the ratio of diesel and gasoline (about 5.3:1) was obtained. The liquid oil was separated by distillation to obtain the biofuel (205–360°C). By comparing the basic properties of the obtained biofuel with 0# diesel and analyzing the basic properties of the resulted biodiesel-diesel blends, the results showed that the performance of the product was almost close to 0# diesel standards; when biodiesel content reached up to 20% in the blend, its properties (such as viscosity, density, and CFPP) changed slightly by comparing with 0# diesel.

Keywords:

• biodiesel
• blends
• diesel
• properties
• pyrolysis