Chemistry Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC.
Bioresour Technol. 2013 Jan;128:297-304. doi: 10.1016/j.biortech.2012.10.111. Epub 2012 Nov 2.
A continuous acid-catalyzed steam explosion pretreatment process and system to produce cellulosic ethanol was developed at the pilot-scale. The effects of the following parameters on the pretreatment efficiency of rice straw feedstocks were investigated: the acid concentration, the reaction temperature, the residence time, the feedstock size, the explosion pressure and the screw speed. The optimal presteaming horizontal reactor conditions for the pretreatment process are as follows: 1.7 rpm and 100-110 °C with an acid concentration of 1.3% (w/w). An acid-catalyzed steam explosion is then performed in the vertical reactor at 185 °C for 2 min. Approximately 73% of the total saccharification yield was obtained after the rice straw was pretreated under optimal conditions and subsequent enzymatic hydrolysis at a combined severity factor of 0.4-0.7. Moreover, good long-term stability and durability of the pretreatment system under continuous operation was observed.
在中试规模下开发了一种连续酸催化蒸汽爆破预处理工艺和系统，用于生产纤维素乙醇。考察了以下参数对水稻秸秆原料预处理效率的影响：酸浓度、反应温度、停留时间、原料粒径、爆破压力和螺杆转速。预处理过程中预蒸水平反应器的最佳条件如下：转速为 1.7rpm，温度为 100-110°C，酸浓度为 1.3%（w/w）。然后在垂直反应器中在 185°C 下进行酸催化蒸汽爆破，持续 2 分钟。在最佳条件下预处理后，通过后续的酶水解，在总糖化产率为 73%左右，组合严重度因子为 0.4-0.7。此外，还观察到预处理系统在连续运行下具有良好的长期稳定性和耐用性。
