Solid fuel. The chemical constituents of firewood are determined by proximate analysis and the ultimate analysis

Ultimate Analysis

The ultimate analysis of a firewood  is a precise chemical determination in which six basic components of the fuel - carbon, hydrogen, oxygen, sulphur and ash. they are expressed in terms of percentage by weight (e.g. kg / kg of fuel).

Proximate Analysis

It shows the four parameters: moisture, volatile matter, fixed carbon, and ash in percentage by weight (e.g. kg / kg of fuel).

Generally combustion calculation is done in Kmol

 
How to Convert kg/kg of firewood to Kmol/ Kmol of firewood ? (Online Calculation)  

Table 1: Typical composition of firewood

Fuel

Ultimate analysis, %

Carbon

Hydrogen

Oxygen

Nitrogen

Sulfur

Ash

Oak, Dry

50.2

6.0

43.3

0.1

...

0.4

Pine, Dry

52.6

7.0

40.1

...

0.3

More data will be added later