RT info:eu-repo/semantics/article
T1 Bio-lubricant production from black liquor as a sustainable biorefinery strategy
A1 Demirkaya, Emre
A1 Cantero Sposetti, Danilo Alberto
A1 Tenorio Alfonso, A.
A1 Cortés Triviño, E.
A1 Franco, J. M.
A1 Cocero Alonso, María José
K1 Biomass
K1 Polyol
K1 Lignin
K1 Depolymerization
K1 Rheology
K1 Thickener
K1 3308 Ingeniería y Tecnología del Medio Ambiente
AB The paper and pulp industry annually generates approximately 170 million tons of black liquor, yet research directly target-ing its utilization remains scarce. Addressing this gap, our study tackles the challenge of revalorizing black liquor throughinnovative techniques. Concurrently, the lubricant industry’s pursuit of eco-friendly alternatives necessitates effective thick-eners for semi-solid lubricant formulations derived from vegetable oils. Our research focuses on revalorizing weak blackliquor via supercritical water hydrolysis, presenting a novel avenue for semi-solid bio-lubricant production. We obtained andtreated four lignin waste fractions, including original black liquor and depolymerized variants through supercritical waterhydrolysis, followed by additional processes such as spray-drying, oven-drying, and ethyl acetate extraction. These ligninfractions were then incorporated into epoxy-modified vegetable oils to formulate sustainable lubricants. Evaluation of theseformulations revealed promising rheological and tribological properties. The resulting castor oil-based bio-lubricants notonly exhibited excellent stability and appearance but also demonstrated notable performance improvements in rheologicaland tribological tests, noticing a maximum wear scar size reduction of around 50%, while maintaining friction factor values.Our findings highlight the potential of depolymerization hydrolysis in enhancing the lubricating properties of castor oil-basedformulations, thus advancing the revalorization of weak black liquor.
PB Springer
SN 2190-6815
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/75235
UL https://uvadoc.uva.es/handle/10324/75235
LA eng
NO Biomass Conversion and Biorefinery, 2024
NO Producción Científica
DS UVaDOC
RD 29-jun-2025