In the absence of utlimate analysis, carbon and hydrogen content may be estimated using Seyler's Correlation:
C=0.95x((CV/41868)-((1.1xVM)/3))+0.434
H=0.069x((CV/41868)+VM)-0.0286
where C - carbon (%); H - hydrogen (%), VM - volatile matter (%) and CV calorific value (kJ/kg).
Net CV is Gross CV...