Abstract: This experiment analyzed different blending ratio of Salix psammophila and coal(coal:Salix psammophila=1∶4, coal:Salix psammophila =5∶5, coal: Salix psammophila =4∶1 ) under different O2/CO2(pure O2, pure CO2, O2/CO2=1∶4, O2/CO2=5∶5, O2/CO2=4∶1) atmosphere using temperature programmed thermogravimetric analysis. The results showed that the combustion characteristic of samples had some regularities along with the change of oxygen concentration and its mixing ratio. The combustion mechanism of samples with oxygen content ≥50% was multiphase combustion. The combustion mechanism of samples with oxygen content ≤20% was homogeneous combustion. A mixture of Salix psammophila and coal had varying degrees of mutual coordination/inhibition within the range of different pyrolysis of interval. And the best coordination were mixture of Salix psammophila content about 20% and O2:CO2=4∶1 atmosphere. The best inhibition was mixture of Salix psammophila content about 20% and pure O2 atmosphere. The innovation of this study relied at studying the analysis on combustion characteristics of biomass and coal mixtures and their interactions under different O2/CO2 atmosphere. To determine the reasonable blends of coal/biomass and O2/CO2 atmosphere could make sure the best synergistic effect in the process of pyrolysis of biomass and coal. Studying the combustion characteristics and synergistic/inhibitory effects of biomass and coal could play an active role in effective clean utilization of coal and biomass, and reduction of environmental pollution.

Key words: coal, Salix psammophila, O2/CO2 combustion technology, thermal gravimetric analysis, interaction effect

摘要： 利用综合热分析仪在O2/CO2（纯O2、纯CO2、O2/CO2=1∶4、O2/CO2=5∶5、O2/CO2=4∶1）气氛条件下对胜利煤、生物质（沙柳）以及二者以不同比例（煤：沙柳=1∶4、煤：沙柳=5∶5、煤：沙柳=4∶1）混合后的试样进行了TG/DTG分析，结果表明：煤、沙柳及二者的混合物的燃烧特性参数随氧气浓度及其掺混比例的变化表现出一定的规律性，含氧量≥50%的样品的燃烧机理为多相燃烧，含氧量≤20%的样品的燃烧机理为均相燃烧。沙柳与煤的混合物在不同热解区间有不同程度的相互协同/抑制作用，其中沙柳含量为20%、含氧量为80%气氛条件下的沙柳和煤的混合物的相互协同性最好，纯O2气氛下的混合物的相互抑制性最好。本研究的创新之处在于研究不同O2/CO2气氛下对生物质与煤混合物的共燃烧进行燃烧特性指数的分析及二者的相互作用。通过确定合理的生物质和煤以及O2/CO2气氛的混合比例可确保在共热解过程中生物质与煤的协同效果最佳，研究生物质和煤的燃烧特性及协同/抑制作用可为煤和生物质的有效洁净利用及降低环境污染起到积极的作用。

关键词: 煤, 沙柳, O2/CO2燃烧技术, 热重分析, 相互作用