期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 227, 期 -, 页码 445-452出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2012.05.052
关键词
CCA-treated wood; ACQ-treated wood; Fast pyrolysis; Bio-oil; Heavy metals
资金
- National Research Foundation (NRF) of Korea
- Ministry of Education, Science and Technology (MEST), Republic of Korea [2010-0009289]
- National Research Foundation of Korea [2010-0009289] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 degrees 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. (C) 2012 Elsevier B.V. All rights reserved.
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