Hydrogen production from biomass gasification using biochar as a catalyst/support

•Biochar showed a promising catalyst/support for biomass gasification.•Interaction between Ni, biochar and volatiles was studied.•Alkali and alkaline earth metals enhanced hydrogen production.•Ni/CC exhibited the highest activity of H2 production (92.08mgg−1 biomass). Biochar is a promising catalyst...

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Veröffentlicht in:Bioresource technology 2016-09, Vol.216, p.159-164
Hauptverfasser: Yao, Dingding, Hu, Qiang, Wang, Daqian, Yang, Haiping, Wu, Chunfei, Wang, Xianhua, Chen, Hanping
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Sprache:eng
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Zusammenfassung:•Biochar showed a promising catalyst/support for biomass gasification.•Interaction between Ni, biochar and volatiles was studied.•Alkali and alkaline earth metals enhanced hydrogen production.•Ni/CC exhibited the highest activity of H2 production (92.08mgg−1 biomass). Biochar is a promising catalyst/support for biomass gasification. Hydrogen production from biomass steam gasification with biochar or Ni-based biochar has been investigated using a two stage fixed bed reactor. Commercial activated carbon was also studied as a comparison. Catalyst was prepared with an impregnation method and characterized by X-ray diffraction, specific surface and porosity analysis, X-ray fluorescence and scanning electron micrograph. The effects of gasification temperature, steam to biomass ratio, Ni loading and bio-char properties on catalyst activity in terms of hydrogen production were explored. The Ni/AC catalyst showed the best performance at gasification temperature of 800°C, S/B=4, Ni loading of 15wt.%. Texture and composition characterization of the catalysts suggested the interaction between volatiles and biochar promoted the reforming of pyrolysis volatiles. Cotton-char supported Ni exhibited the highest activity of H2 production (64.02vol.%, 92.08mgg−1 biomass) from biomass gasification, while rice-char showed the lowest H2 production.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2016.05.011