Biorefinery lignosulfonates from sulfite-pretreated softwoods as dispersant for graphite

Yanlin Qin; Lixuan Yu; Ruchun Wu; Dongjie Yang; Xueqing Qiu; Junyong Zhu

doi:10.1021/acssuschemeng.5b01664

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Biorefinery lignosulfonates from sulfite-pretreated softwoods as dispersant for graphite

Formally Refereed

Authors:

Yanlin Qin, Lixuan Yu, Ruchun Wu, Dongjie Yang, Xueqing Qiu, Junyong Zhu

Year:

2016

Type:

Scientific Journal

Station:

Forest Products Laboratory

DOI:

https://doi.org/10.1021/acssuschemeng.5b01664

Source:

ACS Sustainable Chemistry & Engineering, Vol. 4(4). pp. 2200-2205

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Abstract

Two biorefinery lignosulfonates (LSs), Ca-LS-DF and Na-LS-LP were, respectively, isolated from pilot-scale sulfite-pretreated spent liquor of lodgepole pine and fermentation residue of Douglas-fir harvest forest residue. The molecular weights of Na-LS-LP and Ca-LS-DF were approximately 9 000 and 11 000 Da, respectively. The two LSs were applied as dispersant for graphite in aqueous suspensions. The dispersion stability was evaluated by a scanning electron microscope and Turbiscan Lab Expert. LS performance in modifying graphite was better than that of a commercial dispersant Reax-85A as indicated by the Turbiscan TSI values, zeta potential of suspension particles, and SEM imaging. The practical importance of this study lies in the fact that the pilot-scale sulfite pretreatments that produced the two LSs also produced excellent bioethanol yields at high titer without detoxification and washing, suggesting the LSs are a true value-added coproduct for high yield biofuel production.

Keywords

Lignosulfonate, Graphite, Dispersion stability, Lignin-coproducts, Biorefinery

Citation

Qin, Yanlin; Yu, Lixuan; Wu, Ruchun; Yang, Dongjie; Qiu, Xueqing; Zhu, J.Y. 2016. Biorefinery lignosulfonates from sulfite-pretreated softwoods as dispersant for graphite. ACS Sustainable Chemistry and Engineering. 4(4): 2200-2205.