88. Thangalazhy-Gopakumar,
Suchithra; Adhikari, Sushil; Gupta, Ram B., Catalytic
Pyrolysis of Biomass over H+ZSM-5 under Hydrogen Pressure, Energy & Fuels
2012 26(8), 5300-5306.
Abstract
Catalytic
pyrolysis of pine wood was carried out using H+ZSM-5 in a hydrogen environment.
The first objective of this study was to investigate the effect of hydrogen pressure on
catalytic pyrolysis using H+ZSM-5. The study found that there was no increase
in the aromatic hydrocarbons as the hydrogen pressure increased. The second
objective of this study was to incorporate a hydrogenation effect in addition to
catalytic-cracking during pyrolysis so that the amount of hydrocarbons in the
bio-oil could be increased. The effect of hydrogen pressure on the Mo-impregnated catalyst
was investigated in pine wood pyrolysis. The Mo/ZSM-5 catalyst was not as
active as H+ZSM-5 in lower pressures (100−300 psi); however, at 400 psi,
Mo/ZSM-5 gave more hydrocarbons than H+ZSM-5 did. A significant increase
in aromatic hydrocarbons was found when the H+ZSM-5 catalysts were impregnated
with metals (Ni, Co, Mo, and Pt) as compared to just
the zeolite at 400 psi. On average, 42.5 wt.% of
biomass carbon was converted into hydrocarbons. Aromatic selectivity of major
hydrocarbons was almost the same during hydrocatalytic
pyrolysis of pine wood at 400 psi in the presence of all metal-impregnated
H+ZSM-5 catalysts.
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