B. Effect of N2 Flow
The effect of carrier gas flow was studied by varying N2 flow on 50, 100 and 200 ml/min and
controlling the temperature as 450 C and shell size 2.18 mm in pyrolysis process. The Fig.4 showed the
highest bio oil yield from shell was 38.22 at the condition of N2 flow on 50 ml/min. Additional, the
highest bio oil yield from residual was 34.35 at the condition of N2 flow on 50 ml/min too. They showed
the same phenomena between shell and residue; however the bio oil yield decreased with increasing of N2
flow. It indicated that the volatile was cracked to be condensable gas completely under condition of N2
flow on 50 ml/min because this condition effect to occur laminar flow or steady state condition