Question

Air supply per kg of fuel in incomplete combustion

Answer 1

Most of the fuels contain Carbon and Hydrogen and are in solid, liquid or in gaseous form.

1. Solid Fuels (Coal): Consists of moisture, volatile matter, fixed carbon and ash. The analysis specifies on a mass basis, the relative amounts of these constituents. The ultimate analysis may be given on the dry basis.

2. Liquid Fuels: Most liquid fuels are mixtures of many different Hydrocarbons. Common examples are Gasoline, Kerosene, Diesel oil etc. Commonly a liquid fuel is treated as a single hydrocarbon with an empirical formula CxHy� even though it is a mixture of several hydro carbons.

3. Gaseous fuels: Natural gas (mainly Methane), coal gas (a mixture of methane and Hydrogen) etc.

In most of the combustion processes the required Oxygen is not supplied as pure Oxygen but is supplied as air.� Air contains 21 mol percent O2 and 79 mol percent of N2?