Feedstock pyrolysis products comparison

American Society of Mechanical Engineers Figure 10. Pyrolysis products comparison using various feedstocks (12)... 

The comparison of the peat and wood flash pyrolysis products by Elliott ( ) is a good example of the effect of feedstock on product oil composition. The poplar oil typically was composed of phenolic, ketone and furan compounds with a substantial fraction of low molecular weight organic acids. The main components of the peat oil were hydrocarbons, mostly straight chain olefins. Minor quantities of ketones were noted but no acids, aldehydes or furans were identified by mass spectrometry. Phenols were also present in significant quantities. 

The mixture of organic compounds in bio oil from pyrolysis of different feedstock is shown in Table 5. It can be seen that the amount of phenols is very high in HPL-oil in comparison to others. More than 97 wt, /o of these phenols originate from phenol-formaldehyde resins from the HPL production process. Normally the phenol components have an amount below 1 wt.% in the oil. On the other hand Table 5 demonstrates a large variation in the total amount of each chemical class. 

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