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秸秆苯酚选择性液化研究
Authors
谢双平
陈洪章
Publication date
1 January 2008
Publisher
Abstract
苯酚液化是生物质液化的重要手段,农作物秸秆是一种不均一的原料,而完全液化将其看作是"单一"的原料,针对这一问题本研究采用选择性液化处理方式对小麦秸秆进行了苯酚液化,并对比了选择性液化与完全液化。结果表明:低温下适当的浓硫酸用量、较高的苯酚用量、适当的反应时间有利于保留纤维素而选择性液化半纤维素和木质素;与完全液化处理方式相比,选择性液化反应条件温和,保留了大量的纤维素,大大提高了原料利用价值。通过均匀试验和数据回归分析并实验验证得到选择性液化优化条件为:浓硫酸用量占总反应体系质量分数的3.0%,反应温度100℃,反应时间30min,苯酚与秸秆质量比3∶1,纤维素残留率达70%,而液化产物结合酚质量分数可达100%
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Last time updated on 09/11/2016