芭麻水热液化生物油特性及重金属迁移的研究.

How to dispose heavy metal-rich plant harvest in a green, efficient and resource ・ based manner is an urgent technical problem for the industrial development of phytoremediation of heavy metal・containinated soil・ Using ramie as raw material and water as reaction solvent, the effects of reaction temperature, reaction time and acid-base catalysts on the oil yield and heavy metal migration of ramie were investiga・ ted. The results showed that the highest yield of ramie liquefied bio-oil was 20. 86% at 275 °C, 30 min and 5% HCOOH, and 让s calorific value was 30. 68 MJ/kg・ The organic components of bio・oil in blank group were mainly composed of alcohols, hydrocarbons, acids, ketones and N・containing compounds・ The contents of hydrocarbon and ester compounds in liquefied bio-oil in HCOOH group were increased, while the contents of hydrocarbon, alcohols and acids in bio・oil in NaCO2 group were decreased・ In addition, more than 85% of heavy metals (Cd, Pb, Cu and Cr) are retained in the solid phase residue, while As is mainly transferred to the aqueous phase, and the heavy metal content in bio-oil is less than 4%. [ABSTRACT FROM AUTHOR]