| Abstrakt: |
Biomass is promising renewable energy because of the possibility of value-added fuels production from biomass thermochemical conversion. Among the thermochemical conversion technology, gasification could produce the H 2 -rich syngas then into value-added chemicals via F-T (Fischer-Tropsch) synthesis. However, a variety of difficulties, such as tar formation, reactors impediment, complex tar cracked mechanism, etc. make it difficult to develop for further application. This paper sheds light on the developments of biomass thermochemical conversion, tar classifications, tar formation, and elimination methods. Secondly, we provide a comprehensive the state-of-the-art technologies for tar elimination, and we introduce some advanced high activity catalysts. Furthermore, many represent tar models were employed for explanation of the tar-cracked pathway, and real tar-cracked mechanism was proposed. Following this, some operational conditions and effective gasified models were concluded to give an instruction for biomass catalytic gasification. • Overview of tar formation and elimination during biomass conversion. • In-depth discussion of tar-cracked mechanisms via tar model compounds. • A comprehensive review of tar cracked catalysts is presented. • Prospects and disadvantages of gasification reactions are discussed. [ABSTRACT FROM AUTHOR] |
Full Text from ScienceDirect