Fig. 27.

(a) Van Krevelen diagram derived from the accumulative mass spectra in biomass pyrolysis. Pyrolysis products with similar characteristics fall within specific regions, and their origins are shown in the circles. (b–e) van Krevelen diagrams derived from mass spectra recorded at 0.31, 0.64, 0.91 and 2.01 min, respectively. Reprinted from [408] with permission from Elsevier.