关键词: 生物质焦油, 催化裂解, 钙基催化剂

Abstract: Biomass gasification technology is one of the important technologies for high-valued utilization of biomass. However, its by-product, tar, is difficult to handle. In order to solve the problem of tar produced in the biomass gasification, the catalytic cracking tests were carried out in a fluidized bed reactor with the calcium-based catalyst as bed material. The results showed that calcium-based catalyst has a good catalytic performance on tar cracking, which can significantly improve the tar cracking efficiency. The operating conditions of fluidized bed had an important impact on the catalytic cracking process of the tar. The higher the operating temperature was, the higher the tar cracking efficiency was. Adding a proper proportion of water vapor could improve the tar cracking efficiency and increase the whole product gas yield. In this experiment, the ideal operating temperature was 850 ℃, and the mass ratio of water vapor to tar was 5∶1. The results was expected to provide reference for tar recycling research.

Key words: biomass tar, catalytic cracking, calcium-based catalyst