Design and experiment of in situ vaporization fixed-bed reactor
Bio-oil has many disadvantages such as high oxygen content,strong acidity,poor stability,low calorific value and complex composition.In order to improve the quality of bio-oil,a fixed-bed reactor was designed based on the in situ vaporization strategy.Ni-based catalysts were prepared by impregnation method.The hydrogen production effect of three kinds of waste straw pyrolysis bio-oil was studied by catalytic reforming with gas yield,carbon conversion rate and hydrogen selectivity as the main evaluation indexes.Based on the real-time data of flue gas analyzer,the hydrogen production rates of corn,eggplant and pepper straw pyrolysis bio-oil were calculated to be 38%,40%and 33%,respectively.By SEM combined with energy spectrum analysis,it was found that surface carbon deposition resulted in gradual deactivation of catalyst and weakened hydrogen production capacity of catalytic reforming.The in-situ vaporization fixed-bed reactor,with reasonable design and reliable performance,improved and optimized the hydrogen production process of bio-oil reforming,improved the hydrogen production efficiency,and was conducive to the high value utilization of biomass pyrolysis and liquefaction products.
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