In order to grasp the research status and development of tar cracking technology during biomass gasification in recent years and aim at the production mechanism and thermochemical removal of tar during biomass gasification process,this study reviewed the characteristics of the gasification technology of different biomass gasifiers together with the characteristics of controlling the original emission of tar by means of literature research,summary and comparative analysis. The development of tar thermal cracking and catalytic cracking technology was analyzed,and the advantages and disadvantages of different tar cracking catalysts were compared and analyzed. The main direction of catalyst development was pointed out. The integration of tar catalytic cracking and physical removal (such as tar catalytic cracking,reforming,gas-liquid separation and electric tar capture) would be an effective approach to optimize the biomass gasification process.
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