Catalytic Liquefaction of Corn Stalk under Atomosphere Prssure and the Analysis of Liquefaction Products
ZHANG Juan1, LIU Hai-tang1, 2, LIU Zhong1*, JIANG Qi-fan1
1. Tianjin Key Lab of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China 2. State Key Lab of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510641, China
Abstract：With concentrated phosphoric acid as catalyst and various organic solvents as liquefying agents, corn stalk powder was liquefied into bio-oil in an autoclave, under the condition of 170 ℃. Analysis was conducted to throw light on the liquefying effects of three different agents; they are glycerol triacetate with ethylene carbonate, glycerol with ethylene carbonate and polyethylene glycol with ethylene carbonate(6∶1 ω/ω), and the properties of the biomass liquefaction oil products. FT-IR was applied to examine raw material and residues, whose chemical compositions were further analyzed with the use of GC-MS. The results of experiments indicated that the liquefaction yield of polyethylene glycol was 97.84%, the yield of glycerol triacetate was 80.20%, the yield of glycerol were36.97%. FT-IR analysis showed that the functional groups of cellulose, hemicelluloses and lignin was disappeared and liquefaction is best when polyethylene glycol with ethylene carbonate was used as the liquefaction agent. GC-MS analysis showed that the oil composition produced in this way is complex, contains organic acids and ketones, alcohols and ethers, aromatic, sugars and esters compounds.
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