title: Reaction of cellulose-starch gel mixtures in water at high-temperatures and pressures for developing continuous batch microreactor systems.
abstract: Cellulose-starch gel mixtures (4 wt% cellulose and 4 wt% starch gel) were mixed with water in a 9:1, water:organic, volume ratios and rapidly heated (ca. 20s) to high-temperatures (ca. 520 degrees C) and high-pressures (ca. 800 MPa) in 0.04 microL microreactors to examine their characteristics and reaction products. Contents of the microreactors were observed during the heating with microscopy and residues were analyzed with chromatography and spectroscopy. At high water loading densities (ca. 980 kg/m(3)), heating of either starch gels or cellulose-starch gel mixtures gave a light yellow colored liquid associated with 5-hydroxymethylfurfural along with solid products that had strong absorptions at 1630 and 1530 cm(-1) associated with aromatic and polycyclic ring compounds. At low water loading densities (<700 kg/m(3)), a brown colored liquid was generated that had an oil-like, paraffinic hydrocarbon character along with gases, but no particles were formed. The cellulose-starch gels studied in this work can possibly be used as feedstocks in continuous batch microreactor systems.
authors.affiliation: Tohoku University, Research Center of Supercritical Fluid Technology, Aoba-ku, Aramaki Aza Aoba-6-6-04, Sendai 980-8579, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Ogihara
authors.forename: Richard L
authors.initials: RL
authors.lastname: Smith
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Inomata
authors.forename: Kunio
authors.initials: K
authors.lastname: Arai
mesh_terms: D018533:Biomass; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002482:Cellulose / Q000737:chemistry*; D002625:Chemistry, Organic / Q000379:methods; D002845:Chromatography / Q000379:methods; D005662:Furaldehyde / Q000031:analogs & derivatives / Q000032:analysis; D005782:Gels; D006838:Hydrocarbons / Q000737:chemistry; D009821:Oils; D011312:Pressure; D013053:Spectrophotometry / Q000379:methods; D013213:Starch; D013696:Temperature; D014867:Water / Q000737:chemistry
chemical_list: D005782:Gels; D006838:Hydrocarbons; D009821:Oils; D014867:Water; C008046:5-hydroxymethylfurfural; D002482:Cellulose; D013213:Starch; D005662:Furaldehyde