Low-Temperature Catalytic Cracking of Biomass Gasification Tar Over Ni/HZSM-5
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Tar is a major bottleneck for advancing biomass gasification in industrial applications, and therefore it is necessary to develop a clean and efficient tar elimination technology. Experiments of ex-situ real tar catalytic cracking to produce syngas under low temperature condition were proposed in this study with Ni supported by HZSM-5 as catalyst. The effects of various reaction conditions on catalytic performance were investigated, and the mechanisms of tar cracking and coke formation were also discussed by XRD, ICP-MS and BET analysis. Results showed that tar conversion and heat value of gaseous products were 91.52 wt% and 6.40 MJ/Nm3, respectively, when temperature was 500 °C, WHSV was 0.65 h−1 and Ni loading content was 6 wt%. However, coking rate of catalyst was higher than 19.20 wt%. HZSM-5 supported Ni exhibited remarkable tar cracking ability and it could also improve heating value of gaseous products, but coke deactivation of catalyst should be further investigated.
KeywordsBiomass gasification Tar Catalytic cracking HZSM-5 supported Ni
This work is financially supported by project in the National Science & Technology Pillar Program (2015BAD21B06) and the project in the Natural Science Foundation of China (51676138).
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