Fractionation and purification of lignin fraction in a bio-refinery: Membrane-approaches as an economic and environmental alternative to classic separation techniques
This study aims at recovering valuable compounds from lignocellulosic waste by fractionation of constituents such as lignin and hemicellulose, using a membrane-derived strategy. Two approaches will be integrated to enhance the fractionation potential: Diafiltration; and the use of membrane cascades. Both techniques will be compared with single stage membrane separation. Furthermore, the fractionation potential will be explored after conversion of lignocellulose, in order to produce high added value compounds such as 4-n-propylguaiacol and 4-n-propylsyringol. Distillation will be used as reference method in this case.