For a flow reactor, the space time is: 3 marks\ (a) the time for one reactor volume of feed to flow through the reactor\ (b) the time for complete conversion in a reactor at the current flow rate\ (c) the time for the reactor to achieve steady state\ (d) the time for the Damkhler number to be 1\ [ Jump to answer ]\ 8 Cellulose gasification\ In a biorefinery, a steady-state PFR operating at 600 K is used to convert cellulose 30 marks\ oligomers C n H 2n O n suspended in water into syngas (a mixture of CO and H 2\ that can be easily converted into many different fuels or chemicals):\ C24 H 48 O 24 ( g ) 24 CO ( g ) + 24 H 2 ( g )\ The cellulose oligomers are introduced as a 20 wt% slurry in liquid water; 60 grams\ of the slurry are introduced every second. At this high temperature, it is a good\ approximation to assume all the species in the reactor are in the gas phase. The\ reaction rate law has been measured at 600 K under these conditions to be:\ r C n H2n O n = k [ C n H 2n O n ( g )]\ 1 + a [ CO ( g )]\ 4