《Table 9 Conve rsion and production rate s of che mical familie s pre se nt in bio-oil sample s obta

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《Production of liquid bio-fuel from catalytic de-oxygenation:Pyrolysis of beech wood and flax shives》

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conversion ratio=（moles obtained w ithout de-oxygenation-moles obtained after de-oxygenation）/moles obtained w ithout de-oxygenation×100%N.C.:no change （same as amount present in non-catalytic sample）

M oving on to Figure 8（b），the phenolic contents in the resulting pyrolytic oils after catalytic treatments have increased very importantly.How ever，from the values from Tables 7 and 9，significant production rates w ere found for phenols in the case of all catalysts，except CoM o/Al2O3for both biomasses.How ever，the difference betw een the biomasses w as that flax shives tended to produce more phenols than beech w ood.Thus，it can be inferred that flax shives may possess a higher lignin fraction than beech w ood，w hich could result in a higher phenol production.Now，it is important to note that w hile phenols majorly arise from the lignin fraction，there is also phenol formation coming from the reaction of w ater and aromatics[37].Therefore，it may also be stipulated that some of the phenols produced could have arisen from a reaction of a fraction of the w ater formed by the pyrolysis reaction w ith aromatics.