【摘 要】
：
以超低浓度乙酸作为催化剂对玉米秸秆进行预处理,考察不同温度和水解时间对秸秆水解效果的影响。结果表明:超低浓度乙酸对秸秆的水解具有较好的催化作用,当乙酸浓度为0.08%、
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以超低浓度乙酸作为催化剂对玉米秸秆进行预处理,考察不同温度和水解时间对秸秆水解效果的影响。结果表明:超低浓度乙酸对秸秆的水解具有较好的催化作用,当乙酸浓度为0.08%、温度为150℃、反应时间为60min时,水解液中葡萄糖、木糖、阿拉伯糖和乙酸的浓度分别达到13.38、17.07、5.33、11.86 g/L,而抑制物糠醛的浓度仅为0.2971 g/L。依据Saeman模型,计算得到木聚糖水解和木糖降解的动力学参数:活化能分别为110.57、118.97 k J/mol。
The effect of different temperature and hydrolysis time on the hydrolysis of straw was investigated by using ultra-low concentration of acetic acid as catalyst to pretreat corn straw. The results showed that ultra-low concentration of acetic acid had a good catalytic effect on the hydrolysis of straw. When the concentration of acetic acid was 0.08%, the temperature was 150 ℃ and the reaction time was 60min, the concentration of glucose, xylose, arabinose and acetic acid in the hydrolyzate Respectively reached 13.38,17.07,5.33,11.86 g / L, while the concentration of furfural inhibitor was only 0.2971 g / L. According to the Saeman model, the kinetic parameters of xylan hydrolysis and xylose degradation were calculated: the activation energies were 110.57 and 118.97 kJ / mol, respectively.
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