Ethanol-water pulp enzymatic pretreatment : chemical and FTIR-PCA analyses

• Autor(es): Ruzene, Denise S. ; Gonçalves, A. R.
• Data: 2007
• Identificador Persistente: http://hdl.handle.net/1822/7344
• Origem: RepositóriUM - Universidade do Minho
• Assunto(s): Ethanol/water pulping; Sugarcane bagasse; Xylanase bleaching; Fourier transform infrared spectra; Principal component analysis
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

Pulps obtained from ethanol/water cooking of sugarcane bagasse were treated at different times using xylanase enzyme obtained from Thermomyces lanuginosus IOC-4145 or commercially (Cartazyme HS, Sandoz Products Ltd.). The enzyme dosage was 18 IU per g of dry pulp and the time varied from 4 h to 12 h. When xylanase from T. lanuginosus was used, the kappa number and viscosity improved independently of the processing time used (4 h, 8 h, and 12 h). After chemical evaluation, the obtained pulps were classified using Fourier Transformed Infra-Red Spectroscopy and Principal Component Analysis. The results showed that the first three principal components explained more than 90 % of the total variance of the pulp spectra.