KINETICS OF BAGASSE DELIGNIFICATION BY USING HIGH-BOILING SOLVENT

• Main Authors: Qiang Wang, Kefu Chen, Shanshan Liu Mail, Jun Li, Jun Xu Mail
• Format: Article
• Language: English
• Published: North Carolina State University 2011-05-01
• Series: BioResources
• Subjects: Black liquor; Delignification; High-boiling solvent; Bagasse
• Online Access: http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_06_3_2366_Wang_CLLX_Kinetics_Bagasse_Delignification/1003

Kinetic modeling of lignin removal under conditions of high-boiling solvent (HBS, i.e. 1,4-butanediol) auto-catalyzed pulping of bagasse has been studied. The experimental data were collected based on the absorption of dissolved lignin in black liquor at a wavelength of 320 nm, which can eliminate the interferences arising from furfural (F) and 5-hydroxymethyl furfural (HMF) generated during pulping. The results indicated that the delignification process consists of two distinct phases. The initial phase, involving a very fast reaction, is followed by a rather slow second phase. The delignification equation was determined as: D=87.71×C0.8982× (1-e-1.757t) ×100%, which is valid within an HBS concentration range of 50% to 80% and can be used for predict the lignin removal from bagasse by HBS pulping.