玉米秸秆常压催化液化及产物分析

以玉米秸秆粉末为原料，浓磷酸为反应催化剂，选取多种有机溶剂为液化剂，170 ℃的条件下，在高压反应釜中制备秸秆生物质油。考察了三乙酸甘油酯复配碳酸乙烯酯、甘油复配碳酸乙烯酯以及聚乙二醇复配碳酸乙烯酯(均为6∶1ω/ω)三种不同的混合液化剂对液化得率和生物质油产品性能的影响。采用气质联用仪(GC-MS)分析秸秆生物质油的化学组成;傅里叶红外光谱仪(FTIR)分析原料和液化残渣的主要官能团。实验结果表明聚乙二醇与碳酸乙烯酯混合溶剂液化时，秸秆生物质油得率为97.84%，三乙酸甘油酯与碳酸乙烯酯混合液化时得率为80.20%，甘油与碳酸乙烯酯混合液化时得率为36.97%。FTIR分析结果表明，以聚乙二醇与碳酸乙烯酯混合溶剂为液化剂，秸秆中纤维素、半纤维素和木素的特征官能团几乎全部消失，液化效果最好。GC-MS分析结果表明，生物质油的成分复杂，主要包括有机酸和酮类、醇和醚类、芳香类、糖类和酯类等化合物。

Catalytic Liquefaction of Corn Stalk under Atomosphere Prssure and the Analysis of Liquefaction Products

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 poly-ethylene glycol with ethylene carbonate(6∶1ω/ω),and the properties of the biomass liquefaction oil products.FT-IR was ap-plied to examine raw material and residues,whose chemical compositions were further analyzed with the use of GC-MS.The re-sults 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.