准东煤与玉米秆共热解特性及气体产物释放规律  

Co-pyrolysis Characteristics of Zhundong Coal and Corn Stalk and the Release of Related Gaseous Products

作　　者：张瑞璞 金晶[1,2] 赵冰 杭伊煊[1,2] 刘中毅 朱以周 ZHANG Rutpu;JIN Jing;ZHAO Bing;HANG Yixuan;LIU Zhongyi;ZHU Yizhou(Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Collaborative Innovation Research Institute,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海市动力工程多相流动与传热重点实验室,上海200093 [2]上海理工大学协同创新研究院,上海200093

出　　处：《动力工程学报》2020年第4期272-281,共10页Journal of Chinese Society of Power Engineering

基　　金：十三五国家科技支撑资助项目(2017YFF0209800);国家自然科学基金资助项目(51976129)。

摘　　要：利用热重-质谱联用(TG-MS)和原位漫反射傅里叶变换红外光谱(in situ DRIFT)等实验手段对准东煤与玉米秆的混合样品进行共热解实验,研究了共热解中主要小分子气体(H2、CH4、CO和CO2)的释放规律,探讨了样品中官能团对小分子气体释放的影响。结果表明:准东煤与玉米秆共热解组分相互作用,当玉米秆与准东煤的掺混比K≤0.4时,加入玉米秆可以促进混合样品的热解失重,且K=0.2时促进作用最优,此时玉米秆中高含量的碱金属和热解时产生的大量H自由基会催化热解,能提高H2、CO和CO2小分子气体的生成量,并且强化去甲烷化反应;加入玉米秆促进了官能团的脱氢缩聚进程,大量含氧官能团会催化混合样品中半挥发性有机组分的裂解和重组。Co-pyrolysis characteristics of Zhundong coal and corn stalk mixtures were studied by the way of TG-MS and in situ DRIFT to analyze the release of main small-molecule gas products(H2, CH4, CO and CO2), and to study the effects of functional groups on the release of gas products. Results show that the co-pyrolysis components of Zhundong coal and corn stalk interact with each other. When the blending ratio of Zhundong coal to corn stalk K is less than or equal to 0.4, the weight loss rate of the mixture would rise, and the promotion effect would reach the highest at K=0.2. In the case of K=0.2, the high concentration of alkali metals in corn stalk and the large amount of H radicals generated in the process would promote the progress of pyrolysis, and the presence of alkali metals could improve the yield of H2, CO and CO2, and enhance the demethanation reaction. Furthermore, the addition of corn stalk would promote the dehydrogenation process of functional groups, and the oxygen-containing functional groups could catalyze the cracking and recombination of semi-volatile organic components in the mixed samples.

关 键 词：准东煤 玉米秆 热解 小分子气体 官能团 

分 类 号：TQ530.2[化学工程—煤化学工程]