화학공학소재연구정보센터
Fuel Processing Technology, Vol.193, 197-203, 2019
A wet packed-bed scrubber for removing tar from biomass producer gas
In this work, we report the performance of a lab scale wet packed-bed scrubber using woodchips as a packing material. Wood chips were wetted by waste cooking oil which acted as a scrubber medium. Residence time of 8.5 s was comparable to the packed-bed filter used in a pilot scale gasifier. We studied the effects of oil/gas ratio (4.7 and 7 m(3)/s/m(3)/s x 10(3)), oil temperature (ambient, similar to 23 degrees C and 50 degrees C) and woodchips size (coarse = similar to 0.02-0.045 m, 0.003-0.03 m and 0.002-0.007 m and fine = (0.015-0.04 m) x (0.002-0.005 m) x (0.001-0.003 m)) to remove tar model compounds from producer gas. The results demonstrate liquid to gas ratio has significant effect (p-value = 0.002) on removing toluene as tar model compound; next important parameter is bed configuration (p-value = 0.014), impacting toluene removal efficiency. For naphthalene, oil flow rate (p-value = 0.022) and bed configuration (p-value = 0.024) have almost similar effects. Oil temperature has relatively lower impact on removing tar.