화학공학소재연구정보센터
Industrial & Engineering Chemistry Research, Vol.55, No.41, 10839-10849, 2016
Aromatic Hydrocarbon Production from Bio-Oil by a Dual-Stage Hydrogenation-Cocracking Process: Furfural as a Model Compound
Bio-oil upgrading by catalytic cracking faces problems of low aromatic hydrocarbon yield and coking because of its hydrogen-lacking property. In this work, an improved hydrogenation-cocracking process was developed to achieve the appropriate hydrogen-supply in two stages. Furfural was selected as the Model compound of bio-oil, and methanol was the coreactant. The-hydrogen supply in the hydrogenation stage was successfully regulated by hydrogenation catalysts, and the 5Ni-5Cu/SiO2 catalyst exhibited the best performance because of a suitable degree of hydrogenation of furfural over it, which favored the formation of aromatic hydrocarbons during cracking. With the optimum 5Ni-5Cu/SiO2 catalyst, hydrogenation cocracking Was compared with single-stage cocracking, hydrogenation cracking, and direct cracking processes. The results: confirmed that hydrogen supplements by hydrogenation pretreatment and methanol cocracking were both significant for the generation of aromatic hydrocarbons and the suppression of coke. On the basis of a proposed reaction mechanism, the corresponding hydrogen supply behaviors were revealed.