Characterization of pyrolytic products obtained from fast pyrolysis of chromated copper arsenate (CCA)- and alkaline copper quaternary compounds (ACQ)-treated wood biomasses.
In this study, chromated copper arsenate-treated wood (CCA-W) and alkaline copper quaternary compounds-treated wood (ACQ-W) were subjected to fast pyrolysis at 500°C for ca. 2s to produce bio-oil and char. The physicochemical properties of the pyrolytic products as well as the distribution of heavy metals - arsenic, copper and chrome - during fast pyrolysis were investigated. The water content, viscosity, pH and higher heating value (HHV) of bio-oil from CCA-W were 24.8 wt%, 13.5 cSt, 2.1 and 16 MJ/kg, respectively, whereas those of bio-oil from ACQ-W were 27.9 wt%, 16 cSt, 3.0 and 14.1 MJ/kg, respectively. The yields of bio-oil from CCA-W and ACQ-W were 43.3% and 46.6%, respectively, significantly lower than that of control (61.6%). In the pyrolytic products of CCA-W, the concentrations of arsenic, copper and chromium were determined to be 36.4 wt%, 74.0 wt% and 75.4 wt% in char, respectively, 34.5 wt%, 10.3 wt% and 9.0 wt% in bio-oil, respectively, and 29.0 wt%, 15.7 wt% and 15.5 wt% in gas, respectively. In addition, most of the copper appeared in the char (98.8 wt%) and only a trace amount of copper was detected in the bio-oil (0.2 wt%) produced by ACQ-W.
Department of Forest Sciences and Research Institute for Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea.
Jae-Young
JY
Kim
Tae-Sung
TS
Kim
In-Yong
IY
Eom
Sung Mo
SM
Kang
Tae-Su
TS
Cho
In Gyu
IG
Choi
Joon Weon
JW
Choi
D000393:Air Pollutants / Q000032:analysis*; D001149:Arsenates; D001151:Arsenic / Q000032:analysis; D056804:Biofuels; D018533:Biomass; D002857:Chromium / Q000032:analysis; D003300:Copper / Q000032:analysis; D006358:Hot Temperature; D000644:Quaternary Ammonium Compounds; D014934:Wood
D000393:Air Pollutants; D001149:Arsenates; D056804:Biofuels; D000644:Quaternary Ammonium Compounds; D002857:Chromium; C040890:chromated copper arsenate; D003300:Copper; D001151:Arsenic; C030973:cupric oxide