热解气氛对稻秆半焦组成及气化活性的影响  

Influence of Pyrolysis Atmosphere on Composition and Gasification Activity of Rice Stalk Semi-Coke

作　　者：肖瑞瑞[1,2] 丛兴顺 路文学[2] 王振华 亓欣 董凯[1] 王彦顺[1] 刘海峰 Xiao Ruirui;Cong Xingshun;Lu Wenxue;Wang Zhenhua;Qi Xin;Dong Kai;Wang Yanshun;Liu Haifeng(College of Chemistry,Chemical Engineering and Material Science,Zaozhuang University,Zaozhuang,Shandong 277160,China;Yankuang National Engineering Research Center of Coal Slurry Gasification and Coal Chemical Industry Company Limited,Jinan,Shandong 250101,China;Institute of Clean Coal Technology,East China University of Science&Technology,Shanghai 200237,China)

机构地区：[1]枣庄学院化学化工与材料科学学院,山东枣庄277160 [2]兖矿水煤浆气化及煤化工国家工程研究中心有限公司,山东济南250101 [3]华东理工大学洁净煤技术研究所,上海200237

出　　处：《化学世界》2022年第4期226-231,共6页Chemical World

基　　金：国家自然科学基金面上(No.51674223);山东省自然科学基金面上(No.ZR2018LB030);枣庄市自主创新及成果转化重大专项(No.G201502)资助项目。

摘　　要：通过热解装置和热重仪分别研究了不同气氛(N_(2)、H_(2)和CO_(2))对稻秆热解产物及半焦气化活性的影响。三种气氛中热解半焦产率为CO_(2)>N_(2)>H_(2),焦油和气体产率为CO_(2)<N_(2)<H_(2);半焦中氧元素含量大小为CO_(2)>N_(2)>H_(2),说明氢气中热解稻杆的脱氧效果最好;半焦中有机质相对百分含量随热解温度的升高而减小,并且CO_(2)>N_(2)>H_(2),挥发分占总有机质的百分含量变化趋势与半焦中相反;K和Na析出率为CO_(2)<N_(2)<H_(2);半焦比表面积、孔容和孔径大小顺序为CO_(2)<N_(2)<H_(2);三种气氛中热解所得半焦900℃气化活性为CO_(2)<N_(2)<H_(2)。可见,氢气会促进稻秆的热解,对半焦气化具有活化作用。Effect of different atmosphere on the pyrolysis product of rice stalk and gasification activity of semi-coke was studied with pyrolysis device and thermogravimetric analyzer.The results showed that the order of semi-coke yield was CO_(2)>N_(2)>H_(2),and that of tar and pyrolysis gas yield was CO_(2)>N_(2)>H_(2) during pyrolysis of rice stalk.The content order of oxygen element in the semi-coke was CO_(2)>N_(2)>H_(2),which indicated that hydrogen had the best deoxidation effect during biomass pyrolysis.The relative content percentage of organic matter in semi-coke decreased with the increase of pyrolysis temperature,and the order was CO_(2)>N_(2)>H_(2).The change trend in pyrolysis volatiles was opposite to that in semi-coke.The bleeding ratio of K and Na was CO_(2)>N_(2)>H_(2).The order of BET surface area,volume and average pore size was CO_(2)>N_(2)>H_(2).The gasification reactivity order of semi-coke obtained from different atmospheres at 900℃was CO_(2)>N_(2)>H_(2).Thus,it can be concluded that hydrogen can promote the pyrolysis of rice stalk and activate the gasification of semi-coke.

关 键 词：稻秆 热解 气氛 气化活性 

分 类 号：TK6[动力工程及工程热物理—生物能]