Key Laboratory of Molecular Biophysics of MOE, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China.
Bioresour Technol. 2013 Jan;128:417-22. doi: 10.1016/j.biortech.2012.10.144. Epub 2012 Nov 7.
Non-isothermal thermogravimetry/derivative thermogravimetry (TG/DTG) measurements are used to determine pyrolytic characteristics and kinetics of lignocellulose. TG/DTG experiments at different heating rates with corn stover pretreated with monocultures of Irpex lacteus CD2 and Auricularia polytricha AP and their cocultures were conducted. Heating rates had little effect on the pyrolysis process, but the peak of weight loss rate in the DTG curves shifted towards higher temperature with heating rate. The maximum weight loss of biopretreated samples was 1.25-fold higher than that of the control at the three heating rates, and the maximum weight loss rate of the co-culture pretreated samples was intermediate between that of the two mono-cultures. The activation energies of the co-culture pretreated samples were 16-72 kJ mol(-1) lower than that of the mono-culture at the conversion rate range from 10% to 60%. This suggests that co-culture pretreatment can decrease activation energy and accelerate pyrolysis reaction thus reducing energy consumption.
非等温热重/微商热重（TG/DTG）分析用于测定木质纤维素的热解特性和动力学。采用单培养 Irpex lacteus CD2 和 Auricularia polytricha AP 及其共培养物预处理的玉米秸秆，在不同加热速率下进行 TG/DTG 实验。加热速率对热解过程影响较小，但 DTG 曲线中失重率的峰值随加热速率向高温移动。在三种加热速率下，生物预处理样品的最大失重率比对照样品高 1.25 倍，共培养预处理样品的最大失重率介于两种单培养物之间。在转化率范围为 10%60%时，共培养预处理样品的活化能比单培养物低 1672 kJ/mol。这表明共培养预处理可以降低活化能，加速热解反应，从而降低能耗。
