Analysis of depolymerization product of cornstalk in supercritical ethano | 玉米秆超临界乙醇解聚产物分析
2009
Tang Shirong, China University of Mining and Technology, Xuzhou (China), School of Chemical Engineering | Lu Yao, China University of Mining and Technology, Xuzhou (China), School of Chemical Engineering | Zhou Lei, China University of Mining and Technology, Xuzhou (China), School of Chemical Engineering
中国人. ［目的］研究玉米秆在超临界乙醇条件下的解聚产物。［方法］采用FTIR和GC/MS分析解聚产物。［结果］超临界乙醇解聚产物成分十分复杂，GC/MS分析鉴定出89种有机化合物，其中72种为含氧化合物，主要有酯、酚、醚、酮和醇等，还检测出少量烷烃、烯烃、芳烃、苯硫酚和含氮化合物，反映了解聚产物的高含氧量和低含氮硫量的特性。其中42.7%乙酯类可能是C12-C30_的饱和脂肪酸、部分不饱和脂肪酸、邻苯二甲酸或苯丙酸等与乙醇酯化的结果；而22.9%的苯酚和苯二酚类物质、芳烃类及甲氧基苯类物质可能来源于木质素在超临界乙醇中的解聚作用。［结论］玉米秆的超临界乙醇解聚产物成分十分复杂，乙醇参与了玉米秆的超临界解聚反应。
显示更多 [+] 显示较少 [-]英语. ［Objective］The depolymerization product of cornstalk in supercritical ethanol was studied. ［Method］ The depolymerization product was analyzed with FTIR and GC/MS. ［Result］The results showed that its components were quite complex, and 89 organic compounds were identified. There were 72 kinds of oxygen_containing organic compounds which included esters, phenols, aethers, ketones and alcohols in the depolymerization product, small amounts of alkanes, alkenes, arenes, thiophenol and nitrogen-containing organic compounds were also detected, which showed that characteristics of the product with high oxygen content, low nitrogen and sulphur content. The content of ethyl esters was 42.7%, which indicated that esterification reactions of fatty acids, phthalic acids or phenylpropionic acids with ethanol. Phenols （22.9%）, arenes and methoxybenzenes might come from depolymerization products of lignin in supercritical ethanol. ［Conclusion］ Components of the depolymerization product were quite complex, and ethanol involved in depropagation reaction of cornstalk in supercritical ethanol._
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