resumo
The supercritical fluid extraction of Acacia dealbata Link. bark was performed with carbon dioxide at different pressures (10-30 MPa), temperatures (40-80 degrees C), and cosolvents contents (0-10 wt% of ethyl acetate or ethanol) to analyse their effect on various performance indicators whose best values were: total extraction yield of 1.57 wt %; lupenyl acetate (LA) and lupenone (Lu) extraction yields of 777.5 mg kgbark-1 and 679.8 mg kgbark-1; and LA and Lu extract concentrations of 15.8 wt% and 12.8 wt%. Two extraction curves were measured, and an economic analysis was accomplished. The impact of pressure, temperature, cosolvent content, and extraction time on the cost of manufacturing (COM) and productivity were evaluated, reaching a minimum of 52.3 euro kgextract-1 . A sensitivity analysis showed that the electricity price is the most impactful variable on the COM. Overall, the increase of pressure, temperature and cosolvents content favoured the productivity, decreasing the production cost.
palavras-chave
EUCALYPTUS-GLOBULUS BARK; TECHNOECONOMIC OPTIMIZATION; OPERATING-CONDITIONS; PHASE-EQUILIBRIA; SYSTEM; ACIDS; OIL; CURVES; YIELDS; SEEDS
categoria
Agriculture
autores
Rodrigues, VH; Portugal, IS; Silva, CM
nossos autores
Carlos Manuel Silva
Professor associado
Inês Portugal
Professor AuxiliarProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC). Authors want to thank Project inpactus-innovative products and technologies from eucalyptus, Project No 21874 funded by Portugal 2020 through European Regional Development Fund (ERDF) in the frame of COMPETE 2020 no 246/AXIS II/2017.