Determination of calorific value, sulphur and heavy metal concentration in waste oils.
Thinguri, Thomas Mwangi
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This thesis describes the energy potential, the sulphur content and the metal content of waste oils. The calorific value of waste mineral oil and waste fish oil were found to be 9.093 KcaI/g and 8.561 KcaI/g, respectively. These values are higher than the calorific values of any other waste and compare relatively well with the calorific values of other fuels. Two blend products, a paraffin - waste mineral oil blend and a paraffin - waste fish oil blend, were investigated. The two blends were found to be of higher quality than the unblended products in terms of calorific values and burning qualities. The sulphur content of the oils ranged from 0.10 percent to 1.04 percent, while the heavy metal content of the oils was; Lead -106 ppm, Iron- 258 ppm, copper-24 ppm and calcium-3674 ppm. Concentrations of mercury, arsenic, chromium and manganese in the oils could not be detected. From these results, it was clearly evident that the oils could be recycled for energy generation without much contamination from heavy metals.