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催化学报  2013 

组合催化剂WO3+RaneyNi上高效转化菊芋秸秆制乙二醇

DOI: 10.1016/S1872-2067(12)60686-X, PP. 2041-2046

Keywords: 木质纤维素,菊芋秸秆,三氧化钨,雷尼镍,乙二醇

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Abstract:

?采用商业WO3和RaneyNi为组合催化剂,以菊芋秸秆为反应原料制备了乙二醇.菊芋秸秆中含纤维素51.6wt%、半纤维素10.3wt%、木质素17.2wt%、灰分1.7wt%和水溶性物质19.2wt%.木质素对纤维素和半纤维素的转化影响较小,而水溶性物质的存在抑制了乙二醇的生成,因此由未经过预处理的菊芋秸秆得到的乙二醇收率只有29.9%.而经简单的热水预处理可除掉其中的大部分水溶物,因而乙二醇收率提高到37.6%.此外,组合催化剂在经过热水预处理的菊芋秸秆的转化中表现出了更好的循环使用性能.同时考察了反应温度和时间对菊芋秸秆转化的影响.

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