期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 46, 期 14, 页码 7849-7856出版社
AMER CHEMICAL SOC
DOI: 10.1021/es204681y
关键词
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资金
- National Natural Science Foundation of China [50978242]
- National 863 Program [2009AA06Z305]
- Fundamental Research Funds for the Central Universities [WK2060190007]
Heavy-metal-polluted biomass derived from phytoremediation or biosorption is widespread and difficult to be disposed of In this work, simultaneous conversion of the waste woody biomass into bio-oil and recovery of Cu in a fast pyrolysis reactor were investigated. The results show that Cu can effectively catalyze the thermo-decomposition of biomass. Both the yield and high heating value (HHV). of the Cu-polluted fir sawdust biomass (Cu-FSD) derived bio-oil are significantly improved compared with those of the fir sawdust (FSD) derived bio-oil. The results of UV-vis and H-1 NMR spectra of bio-oil indicate pyrolytic lignin is further decomposed into small-molecular aromatic compounds by the catalysis of Cu, which is in agreement with the GC-MS results that the fractions of C7-C10 compounds in the bin-oil significantly increase. Inductively coupled plasma-atomic emission spectrometry, X-ray diffraction, and X-ray photoelectron spectroscopy analyses of the migration and transformation of Cu in the fast pyrolysis process show that more than 91% of the total Cu in the Cu-FSD is enriched in the char in the form of zerovalent Cu with a face-centered cubic crystalline phase. This study gives insight into catalytic fast pyrolysis of heavy metals, and demonstrates the technical feasibility of an eco-friendly process for disposal of heavy-metal-polluted biomass.
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