Co-liquefaction of spent coffee grounds and lignocellulosic feedstocks. (August 2017)

• Record Type: Journal Article
• Authors: Yang, Linxi; He, Quan (Sophia); Havard, Peter; Corscadden, Kenneth; Xu, Chunbao (Charles); Wang, Xuan
• Is Part Of: Bioresource technology. Volume 237(2017)
• Page Start: 108
• Page End: 121
• Publication Date: 2017-08
• Subjects: Spent coffee grounds (SCG) -- Co-liquefaction -- Bio-crude oil -- Synergistic effect -- Lignocellulose feedstocks; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.02.087
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Co-liquefaction of spent coffee grounds and lignocellulosic feedstocks. Liquefaction conditions: 250 °C, feedstock combination ratio 1:1 and 5% NaOH as a catalyst. In co-liquefaction of SCG and CS, the oil yield was increased by 20.9%. Abstract: Co-liquefaction of spent coffee grounds (SCG) with paper filter (PF), corn stalk (CS) and white pine bark (WPB) respectively, was examined in subcritical water for bio-crude oil production. The optimum reaction temperature was 250 °C, and the mixing biomass ratio was 1:1. SCG and CS was identified to be the best feedstock combination with a significant positive synergetic effect in the co-liquefaction process with 5% NaOH as a catalyst. The yield of bio-crude oil was increased by 20.9% compared to the mass averaged yield from two feedstocks, and the oil quality was also improved in terms of viscosity and relative molecular mass. A negative effect presented in the co-liquefaction of SCG/WPB. The resulting bio-crude oils were characterized by elemental analyzer, GC–MS, GPC and viscometer, indicating that mixing feedstock in the co-liquefaction process also influenced the higher heating value (HHV), viscosity, molecular mass and chemical composition of bio-crude oil.