Reaction kinetics of stover liquefaction in recycled stover polyol.
The purpose of this research was to study the kinetics of liquefaction of crop residues. The liquefaction of corn stover in the presence of ethylene glycol and ethylene carbonate using sulfuric acid as a catalyst was studied. It was found that the liquefaction yield was a function of ratio of solvent to corn stover, temperature, residence time, and amount of catalyst. Liquefaction of corn stover was conducted over a range of conditions encompassing residence times of 0-2.5 h, temperatures of 150-170 degrees C, sulfuric acid concentrations of 2-4% (w/w), and liquefaction reagent/corn stover ratio of 1-3. The liquefaction rate constants for individual sets of conditions were examined using a first-order reaction model. Rate constant increased with the increasing of liquefaction temperature, catalyst content, and liquefaction reagent/corn stover ratio. Reuse of liquefied biomass as liquefying agent was also evaluated. When using recycled liquefied biomass instead of fresh liquefaction reagent, the conversion is reduced. It appeared that 82% of liquefaction yield was achieved after two times of reuse.
Yu
Fei
F
Center for Biorefining and Biosystems and Agricultural Engineering, University of Minnesota, 1390 Eckles Avenue, St Paul, MN 55108, USA.
Ruan
Roger
R
Lin
Xiangyang
X
Liu
Yuhuan
Y
Fu
Rong
R
Li
Yuhong
Y
Chen
Paul
P
Gao
Yinyu
Y
D045424:Complex Mixtures / Q000737:chemistry; D003198:Computer Simulation; D003246:Conservation of Energy Resources; D004148:Dioxolanes / Q000737:chemistry*; D019855:Ethylene Glycol / Q000737:chemistry*; D007220:Industrial Waste / Q000517:prevention & control; D007700:Kinetics; D008956:Models, Chemical; D035261:Plant Components, Aerial / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012212:Rheology / Q000379:methods; D012995:Solubility; D012996:Solutions / Q000737:chemistry; D013464:Sulfuric Acids / Q000737:chemistry*; D013696:Temperature; D003313:Zea mays / Q000737:chemistry*
D045424:Complex Mixtures; D004148:Dioxolanes; D007220:Industrial Waste; D011108:Polymers; D012996:Solutions; D013464:Sulfuric Acids; C024617:polyol; D019855:Ethylene Glycol; C033158:sulfuric acid; C031133:ethylene carbonate