Abstract: In this paper,the experiment of sawdust gasification over copper slag catalyst was conducted,then the effect of the gasification agent and the carrier gas was studied on the composition and heating value of the syngas. When the water vapor equivalent ratio to biomass was 0.058,the yield of tar was approximately decreased by half and the hydrogen yield was improved by 63.04%,so the gasification efficiency increased to 75.03%. After obtaining the ideal experimental conditions,thermodynamic analysis of the sawdust gasification with copper slag was performed based on the energy balance. Then,the coupling relationships were obtained between copper slag,sawdust and water vapor. The sensible heat of molten copper slag was 1773kJ/kg at 1250℃. When making full use of copper slag comprising sensible heat and latent heat,the heat value of synthesis gas was 13319kJ from the sawdust gasification. Under ideal gasification conditions,1kg sawdust met 1.92kg copper slag,and the recycling energy utilization of hot copper slag catalytic sawdust gasification increased to 62.94%.

Key words: copper slag, sawdust, gasification, thermodynamics, waste heat recovery

摘要： 以木屑为原料，在铜渣催化气化木屑的实验平台上研究了气化剂和载气对气体产物成分及热值的影响。根据实验结果，当水蒸气当量比为0.058时，焦油产率降低了约50%，氢气产率提高了63.04%，气化效率达75.03%。在优化的实验条件下基于能量平衡建立熔融铜渣催化气化木屑的热力学分析方法，得到铜渣、木屑及水蒸气之间的耦合关系，1250℃的熔融铜渣的余热高达1.773 MJ/kg，充分利用铜渣显热和潜热气化木屑产生的合成气热值可高达13319 kJ。在最优气化工况下，1 kg原料气化需要1.92 kg铜渣，热态铜渣催化气化木屑的能量利用率可达62.94%。

关键词: 铜渣, 木屑, 气化, 热力学, 余热利用