杨木预水解液中化学组分质量浓度的P因子调控

Regulation Effect of P Factor on Mass Concentration of Chemical Composition in Prehydrolysis Liquor of Poplar

为研究P因子对木质纤维原料预水解液中化学组分质量浓度的调控机制,分析了不同预水解温度(170~210℃)和预水解时间(30~120 min)条件下,杨木预水解液中固形物、木质素、木糖和葡萄糖质量浓度的变化规律。结果表明:升高预水解温度和延长预水解时间,固形物、木质素和葡萄糖质量浓度均逐渐增大。而木糖质量浓度随温度的升高而降低;190℃时,木糖质量浓度随预水解时间延长迅速减小。P因子对杨木预水解液中化学组分的质量浓度具有调控作用。固形物、木质素和葡萄糖质量浓度随P因子增加呈指数增大。而木糖质量浓度随P因子增加呈指数减小,P因子小于3300时,木糖质量浓度随P因子增加迅速减小。

In order to reveal the regulation mechanism of P factor on the mass concentration of chemical composition in prehydrolysis liquor of lignocellulose,the mass concentration changes of solid content,lignin,xylose and glucose were studied at different prehydrolysis temperature(170-210℃)and time(30-120 min).The results showed that the mass concentration of solid content,lignin and glucose gradually increased with the increase of prehydrolysis temperature and time.While the mass concentration of xylose rapidly decreased with the increase of temperature and prehydrolysis time at 190℃.There was a regulation effect of P factor on mass concentration of chemical composition in prehydrolysis liquor of poplar.The mass concentration of solid content,lignin and glucose presented an exponential increase with the increase of P factor.However,a conspicuous decrease of mass concentration of xylose was found with the increase of P factor when P factor<3300.