Clean bio-oil production from fast pyrolysis of sewage sludge: effects of reaction conditions and metal oxide catalysts.
Fast pyrolysis of sewage sludge was carried out under different reaction conditions, and its effects on bio-oil characteristics were studied. The effect of metal oxide catalysts on the removal of chlorine in the bio-oil was also investigated for four types of catalysts. The optimal pyrolysis temperature for bio-oil production was found to be 450 degrees C, while much smaller and larger feed sizes adversely influenced production. Higher flow and feeding rates were more effective but did not greatly affect bio-oil yields. The use of the product gas as the fluidizing medium gave an increased bio-oil yield. Metal oxide catalysts (CaO and La2O3) contributed to a slight decrease in bio-oil yield and an increase in water content but were significantly effective in removal of chlorine from the bio-oil. The fixed catalyst bed system exhibited a higher removal rate than when metal oxide-supported alumina was used as the fluidized bed material.
Park
Hyun Ju
HJ
Faculty of Environmental Engineering, University of Seoul, 90 Jeonnong-Dong, Dongdaemun-Gu, Seoul, Republic of Korea.
Heo
Hyeon Su
HS
Park
Young-Kwon
YK
Yim
Jin-Heong
JH
Jeon
Jong-Ki
JK
Park
Junhong
J
Ryu
Changkook
C
Kim
Seung-Soo
SS
D000537:Aluminum Oxide / Q000737:chemistry / Q000494:pharmacology; D001674:Bioelectric Energy Sources; D019149:Bioreactors; D017610:Calcium Compounds / Q000737:chemistry / Q000494:pharmacology; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D002712:Chlorides / Q000737:chemistry; D006358:Hot Temperature; D006859:Hydrogen / Q000737:chemistry; D007811:Lanthanum / Q000737:chemistry / Q000494:pharmacology; D009584:Nitrogen / Q000737:chemistry; D009821:Oils / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry / Q000494:pharmacology*; D010316:Particle Size; D012722:Sewage / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry; D013997:Time Factors
D017610:Calcium Compounds; D002712:Chlorides; D009821:Oils; D010087:Oxides; D012722:Sewage; C103829:lanthanum oxide; D007811:Lanthanum; D013455:Sulfur; D002244:Carbon; D006859:Hydrogen; C016538:lime; D000537:Aluminum Oxide; D009584:Nitrogen