Traditionally, the main source of biodiesel is vegetable oil.
The types of vegetable oils available depend on the climate
and soil conditions of the country In Thailand, over 90% of biodiesel production is from
palm oil as raw material . The most
widely used biodiesel feedstock in the United States is soybean
oil. Biodiesel feedstock can be
categorized into three types: edible oils, non-edible oils, and
reusable sources or wastes, as summarized in Table 6. Some
researchers are interested in biodiesel production using oi