Project R-15808

Valorization of Lignin Residues as Activated Carbon-Supported Biorefinery catalysts (Research)

In the ongoing shift towards a circular economy, considerable research efforts have recently been directed toward plant-based sourcing of essential chemicals, such as phenolics derived from technical lignin waste streams. However, during the work-up of this stream, a considerable amount of insoluble solid residues is generated (up to 60 m%) that adversely impacts the atom economy of this process. To address this challenge, we propose an innovative approach to convert these residues into valuable flame retardant fillers, adsorbent materials, and high-performance catalyst supports. This mitigates the waste issue and aligns with the growing demand for advanced surface-engineered substrates. This project aims to tackle two critical challenges simultaneously. First, we will investigate the conversion of lignin residues into specialty activated carbons. Second, we will employ various lignin phosphorylation techniques to create unique sorbents and bi-functional catalysts, introducing specific phosphonate surface groups. Importantly, we will utilize non-toxic and environmentally friendly phosphorylation reagents in this process. Through this approach, we achieve ultimate circularity and resource optimization, allowing the valorization of the liquid lignin-derived fraction using its solid residue. This innovative workflow addresses the waste challenge and contributes to the sustainable production of platform chemicals from renewable carbon sources.

01 September 2024 - 31 August 2027