Prediction of pyrolysis oils higher heating value with gas chromatography-mass spectrometry

► Calculation HHV of pyrolysis oils with measures of GC-MS or HPLC is exposed. ► GC-MS or HPLC analysis results of 34 pyrolysis oils are used to verify it. ► A Dulong formula and two of Vondracek are used to calculate the oils' HHV. ► New method and Vondracek's formulae give good agreement with experimental values.