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Upgrading of bio-oil from biomass pyrolysis over Cu-modified β-zeolite catalyst in a down-draft fixed-bed reactor, in which the pyrolysis and upgrading processes are integrated, is investigated in details. It is found that high silica β-zeolite has high selectivity to the hydrocarbon during the upgrading process. When it is modified by a small amount of Cu, the selectivity can be obviously promoted...
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