During heat up and at the beginning of the reaction, pressure
drop oscillations were observed as shown in Fig. 2. The oscillations
stopped after the reaction was complete. This unstable behavior
suggests that close attention should be paid to the design of the
reactor during large scale FT pretreatment implementation, for
example by providing mixing to minimize compaction and
rearrangement of the biomass bed. As the temperature was
brought down, the pressure drop increased linearly with increasing
water viscosity, which increases with decreasing temperature
according to the Arrhenius equation (Bird et al., 2002). An Arrhenius
model for the temperature dependance of viscosity predicted
the increase in pressure drop observed as the reactor was cooled,
as shown in Appendix B. However, the temperature dependance
of viscosity did not predict the pressure drop during the reaction
due to the instability of the biomass bed. The compaction of the
biomass, its water absorption
During heat up and at the beginning of the reaction, pressure
drop oscillations were observed as shown in Fig. 2. The oscillations
stopped after the reaction was complete. This unstable behavior
suggests that close attention should be paid to the design of the
reactor during large scale FT pretreatment implementation, for
example by providing mixing to minimize compaction and
rearrangement of the biomass bed. As the temperature was
brought down, the pressure drop increased linearly with increasing
water viscosity, which increases with decreasing temperature
according to the Arrhenius equation (Bird et al., 2002). An Arrhenius
model for the temperature dependance of viscosity predicted
the increase in pressure drop observed as the reactor was cooled,
as shown in Appendix B. However, the temperature dependance
of viscosity did not predict the pressure drop during the reaction
due to the instability of the biomass bed. The compaction of the
biomass, its water absorption
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