Question

Why some of the fuels leave behind residue after burning? Is it because they contain carbon or something else

Answer 1

Answer:

15 carbon residue. carbon residue is an indication of the fuel to decompose and form carbonaceous material that can plug diesel fuel injection nozzles. the residue is weighed into a special glass bulb and heated in a furnace to 1022°F ( 550°C) . most of the samples evaporates or decomposes under these conditions.