title: Characterization of white poplar and eucalyptus after ionic liquid pretreatment as a function of biomass loading using X-ray diffraction and small angle neutron scattering.
abstract: A systematic study was performed to understand interactions among biomass loading during ionic liquid (IL) pretreatment, biomass type and biomass structures. White poplar and eucalyptus samples were pretreated using 1-ethyl-3-methylimidazolium acetate (EmimOAc) at 110°C for 3h at biomass loadings of 5, 10, 15, 20 and 25wt%. All of the samples were chemically characterized and tested for enzymatic hydrolysis. Physical structures including biomass crystallinity and porosity were measured by X-ray diffraction (XRD) and small angle neutron scattering (SANS), respectively. SANS detected pores of radii ranging from ∼25 to 625Å, enabling assessment of contributions of pores with different sizes to increased porosity after pretreatment. Contrasting dependences of sugar conversion on white poplar and eucalyptus as a function of biomass loading were observed and cellulose crystalline structure was found to play an important role.
authors.affiliation: College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Xueming
authors.initials: X
authors.lastname: Yuan
authors.affiliation: College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Yonghao
authors.initials: Y
authors.lastname: Duan
authors.affiliation: Biology and Soft Matter Division, Oak Ridge National Laboratory, TN 37830, USA.
authors.forename: Lilin
authors.initials: L
authors.lastname: He
authors.affiliation: Deconstruction Division, Joint BioEnergy Institute (JBEI), Emeryville, CA 94608, USA; Sandia National Laboratories, Livermore, CA 94551, USA.
authors.forename: Seema
authors.initials: S
authors.lastname: Singh
authors.affiliation: Deconstruction Division, Joint BioEnergy Institute (JBEI), Emeryville, CA 94608, USA; Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
authors.forename: Blake
authors.initials: B
authors.lastname: Simmons
authors.affiliation: College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China; Deconstruction Division, Joint BioEnergy Institute (JBEI), Emeryville, CA 94608, USA; Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA. Electronic address: gchengbuct@gmail.com.
authors.forename: Gang
authors.initials: G
authors.lastname: Cheng
mesh_terms: D018533:Biomass; D002482:Cellulose / Q000737:chemistry; D005052:Eucalyptus / Q000737:chemistry*; D006868:Hydrolysis; D007093:Imidazoles / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry*; D033363:Neutron Diffraction; D032107:Populus / Q000737:chemistry*; D053838:Scattering, Small Angle; D014961:X-Ray Diffraction
chemical_list: D007093:Imidazoles; D052578:Ionic Liquids; D002482:Cellulose; C518739:1-ethyl-3-methylimidazolium
keywords: Biomass loading; Ionic liquid pretreatment; Porosity; SANS; XRD