Supercritical Methanol Solvolysis and Catalysis for the Conversion of Delignified Woody Biomass into Light Alcohol Gasoline Bioblendstock. (27th January 2022)

• Record Type: Journal Article
• Authors: Nguyen, Hannah; Huq, Nabila A.; Stück, Daniela; Tifft, Stephen M.; Conklin, Davis R.; Koehler, Andrew J.; McNeary, William Wilson; Fioroni, Gina M.; Hays, Cameron; Christensen, Earl D.; McNamara, Ian; Bartling, Andrew; Davis, Ryan; Unocic, Kinga A.; Vardon, Derek R.
• Is Part Of: Advanced sustainable systems. Volume 6:Number 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-27
• Subjects: bioblendstocks -- catalysis -- gasoline -- light duty -- solvolysis -- woody biomass; Sustainable living -- Periodicals; Sustainability -- Periodicals; Green technology -- Periodicals; Periodicals; 628
• DOI: 10.1002/adsu.202100310
• Languages: English
• ISSNs: 2366-7486

Abstract

Abstract: Supercritical methanol (SCM) solvolysis and catalysis has recently emerged as a promising pathway to produce gasoline‐range light alcohols from woody biomass through staged depolymerization and hydro‐deoxygenation (DHDO). Here, structure–property relationships of Cu"M"AlO x catalysts (M = Mg, Zr, and Ce) are examined for upgrading delignified hybrid poplar via SCM‐DHDO. CuCeAlO x displays the highest activity, increasing the C2 C7 alcohol production rate and selectivity by twofold in batch reactions, and > 50% in semicontinuous reactions relative to the current state‐of‐the‐art CuMgAlO x . The performance of CuCeAlO x is correlated with its high reducibility and acidity. Cu sintering and biogenic impurity poisoning are identified as possible deactivation mechanisms over 60 h of continuous testing. The gasoline‐range SCM‐DHDO products are comprised of primarily aliphatic alcohols that result in improved energy density and favorably reduced vapor pressure, relative to ethanol, with the tradeoff of nonsynergistic octane blending with conventional gasoline and lower oxidation stability. Overall, this work highlights the potential to produce suitable light oxygenates by SCM‐DHDO processing for gasoline bioblendstock applications. Abstract : Here, the process to convert lignocellulose biomass into biofuel via reductive catalytic fractionation to remove lignin monomers, followed by supercritical methanol and catalytic upgrading of cellulosic residues to produce light alcohols, is discussed.