Nanostructural Evolution of Sugarcane Rind and Pith Submitted to Hydrothermal Pretreatments

• 作者: Antonio A.S.Curvelo Carlos Driemeier Marcelo M.Oliveira
• 来源期刊: 可再生材料杂志(英文)
• 学科: 化学
• 关键词: Cellulose BAGASSE SUGARCANE CELLULOSIC ethanol PRETREATMENT
• 年，卷（期）: 2018,（2）
• 页码范围: 152-159
• 页数: 8页
• 分类号: O61

摘要

Lignocellulose conversion into cellulosic ethanol and coproducts starts with a pretreatment step.Most current industrial plants of cellulosic ethanol use thermochemical pretreatments under hydrothermal conditions,with or without addition of acid catalyst.Such pretreatments modify biomass chemistry and morphology,particularly at the nanoscale.In this work,we use X-ray diffraction,dynamic vapor sorption and calorimetric thermoporometry to investigate the biomass nanostructural changes promoted by hydrothermal conditions.We compare and differentiate the rind and pith fractions of sugarcane stalks in order to contribute to the understanding of rind-pith contrasting recalcitrance.Moreover,for both cane fractions our results point consistently to cellulose co-crystallization,lignin aggregation,and opening of nanoscale pores as the main nanostructural phenomena occurring during hydrothermal treatments.