Lignin valorization has been a long sought-after goal and recent advances have made headway into purifying valuable compounds from lignin-rich waste streams, but the separations challenges remain complex due to the heterogeneous nature of the solutions that result from the chemical deconstruction of biomass. Current approaches to membrane fractionation of lignin rich streams reported in the literature lack definitive process energetics, recovery yields, and purities of separated monomers. This seminar will discuss recent work with ceramic membrane fractionation of various lignin depolymerization solutions including Alkaline Pretreatment Liquor (APL) and Reductive Catalytic Fractionation (RCF) oils to produce feed streams for use in catalytic fuel production and as feed streams in biological conversion processes. The energetics of molecular weight filtration will be discussed for both tangential flow filtration in shell and tube systems versus advanced rotary disc filtration which is shown to substantially reduce energy requirements and increase throughput. Chemical analysis of the recovered streams will also be presented with a focus on yields, purities, and applicability for fuel and product production.

Membrane enabled molecular fractionation of lignin rich solutions

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.