부산대학교 도서관

The fluid catalytic cracking (FCC)route could be considered forthe co-processing of biomass-derived pyrolysis oil with petroleum-derivedvacuum gas oil (VGO) in a typical refinery unit by integrating itwith a biomass fast pyrolysis process. This paper aims to study theeffect of co-processing pyrolysis oil representative model compounds(C2–C3 carbonyls such as hydroxyacetone and glycolaldehydedimer) with VGO in a FCC advanced cracking evaluation (ACE-R) unit,using an industrially available FCC equilibrium catalyst (E-CAT).The blending ratios of C2–C3 carbonyls and VGO were variedfrom 5:95, 10:90, 15:85, and 20:80. The reactor was operated in closeto industrial FCC process at a temperature of 530 °C and atmosphericpressure with a catalyst-to-oil ratio of 5.0. The blended FCC feedstockand their liquid distillates were structurally characterized by 1H and gated decoupled 13C NMR techniques. The averagestructural parameters like branchiness index, substitution index,average length of alkyl chains, and fraction of aromaticity per moleculewas obtained from NMR data. A linear increase in FCC conversion wasobserved with increase in hydroxyacetone blending ratio with VGO from5% to 20%, which may be due to an increase in propylene and a decreasein heavy cycle oil. Increasing the glycolaldehyde blending ratio from5% to 10% increased the FCC conversion, while the conversion decreasedat ratios of 15% and 20%. The 1H NMR and 13CNMR data indicated that there is an increase in the amount of monoaromaticswith increases in the amount of hydroxyacetone, whereas in the caseof glycolaldehyde, the monoaromatics increased for blending ratiosup to 10% and decreased upon further increases in blending ratio.The equilibrium FCC catalyst is capable of cracking oxygenates presentsin pyrolysis oil such as hydroxyacetone and glycolaldehyde towardthe production of liquefied petroleum gas (LPG) range products. Furthermore,a scheme has been proposed for the processing of pyrolysis oil inpetroleum refinery units. [ABSTRACT FROM AUTHOR]