title: Direct hydrolysis of cellulose to glucose using ultra-high temperature and pressure steam explosion.
abstract: Hydrolysis of two cellulosic materials, i.e. microcrystalline cellulose powder (MC) and cuprammonium rayon fiber (BEMCOT), to glucose was carried out by steam explosion treatment with ultra-high temperature and pressure steam aiming at an effective usage of unutilized cellulosic materials. 50 g of cellulosic materials were charged in a sealed reactor (2L) of the steam explosion apparatus kept at steam pressures of 50, 55, 60, and 62 atm for a steaming time of 1 min. The maximum yield of water soluble sugars, 52.8%, was obtained at a steam pressure of 62 atm and a steaming time of 1 min for MC. Furthermore, the maximum yield of water soluble sugars, 67.7%, was obtained at a steam pressure of 60 atm and a steaming time of 1 min for BEMCOT. This water soluble sugars contained 63.1% and 61.0% of glucose, respectively; they are corresponding to 33.3g and 41.0 g of glucose contained in 100g of dry steam-exploded cellulosic material.
authors.affiliation: Department of Life System, Institute of Technology and Science, The University of Tokushima, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan.
authors.forename: Chizuru
authors.initials: C
authors.lastname: Sasaki
authors.forename: Keisuke
authors.initials: K
authors.lastname: Sumimoto
authors.forename: Chikako
authors.initials: C
authors.lastname: Asada
authors.forename: Yoshitoshi
authors.initials: Y
authors.lastname: Nakamura
mesh_terms: D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D005947:Glucose / Q000737:chemistry*; D006358:Hot Temperature; D006868:Hydrolysis; D011312:Pressure; D013227:Steam
chemical_list: D013227:Steam; C066013:AM 160H; D002482:Cellulose; D005947:Glucose; C109691:microcrystalline cellulose