生物质气化过程中焦油形成机理的研究

THE RESEARCH OF TAR VARIATION MECHANISM FOR BIOMASS GASIFICATION

以谷壳气化过程中产生焦油为研究对象,考查了在不同温度情况下的焦油组成变化。实验结果表明:温度的不同,气化过程中产生的焦油组成也不同,且随温度的升高,低温中形成的焦油组成会发生热裂解进行二次反应,生成新的焦油组成。通过对焦油的GC-MS分析说明,随温度升高,焦油组分的变化是一个脱氧且芳香化程度增大过程,当达到800℃以上时,焦油中的主要组份以多环芳烃为主,从而为生物质气化过程中焦油催化裂解催化剂的开发指明方向。

Tar from rice hull gasification was studied in this paper; the effect of temperature on tar composition was researched.The experimental results indicate that the different tar composition is obtained from different gasification temperature,the molecular bonds of the biomass break when biomass is heated; the smallest gaseous molecules are produced,the larger molecules are called primary tars.These primary tars,which are always fragments of the original material,can react to secondary tars by further reactions at the same temperature and to tertiary tars at high temperature.