基于铁矿石为氧载体的生物质化学链气化技术实验研究

Experimental study on biomass chemical chain gasification technology based on iron ore as oxygen carrier

生物质能因为其资源分布广泛、低污染和可再生等性能成为当前人们关注的重点。基于传统气化技术和化学链燃烧技术而衍生出的化学链气化技术具有低气化成本、高产气率和碳转化率高等优点。采用松木屑作为生物质原料,选用铁矿石作为氧载体,探究基于铁矿石为氧载体的生物质化学链气化反应过程,在流化床反应器上进行实验,采用控制变量法,从氧载体、水蒸气和温度等3个方面分析对化学链气化过程的影响。实验结果表明,氧载体对于气化反应的产气率和碳转化率都起到了促进作用,水蒸气的通入使得可燃气中H2的含量明显增多,温度的升高使气化反应最终的产气率和碳转化率逐渐增大。

Biomass energy has become the focus of attention because of wide distribution of resources,low pollution and reproducible.Chemical looping gasification is based on traditional gasification technology and chemical looping combustion.It has the advantages of low gasification cost,high gas yield and high carbon conversion rate.This paper used pine sawdust as biomass feedstock and iron ore as an oxygen carrier.The process of biomass chemical looping gasification based on iron ore as oxygen carrier was explored.Experiments were conducted on a fluidized bed reactor and used control variable method.The effects of oxygen carrier,water vapor and temperature on chemical chain gasification were analyzed in three aspects.The experimental results showed that,oxygen carrier gas for the gasification reaction rate and the carbon conversion rate had played a role in promoting.The water vapor content in the gas can pass into the H2 increased significantly.Temperature made the final gasification gas production rate and the carbon conversion rate increased gradually.