抄録
In order to produce bio-diesel fuel (BDF) effectively from triglyceride contained in coffee grounds, the solid catalyst method using calcium oxide was examined. Since commercially available calcium oxide has low catalytic activity, a method of converting the calcium oxide to calcium methoxide and/or calcium glyceroxide before esterification was tested. The method was applied to generate the BDF from unused canola oil. The produced liquid was analyzed both chemically and by the NMR, and it was revealed that the liquid was able to be called as BDF and esterification rate was about 80%. Extraction of triglyceride from waste coffee grounds was tried using hexane as a solvent, and 780 mL of triglyceride-rich oil was extracted from 8 kg of the waste coffee grounds. The oil was subjected to the BDF production using the calcium oxide and the BDF was produced at the esterification rate of about 75%. The coffee grounds after the extraction of the triglyceride-rich oil were applied to deodorants and solid fuels. The experimental results showed that the coffee grounds decreased the smell of cigarettes. Furthermore, it was also found that the coffee grounds were easily ignited and burned by adding some sawdust and wax to the coffee grounds.
