Engineering Commons^™

Slow Pyrolysis Of Lignin Rich Residue From Lignocellulosic Biorefining Operations, Paola Giudicianni, Corinna Maria Grottola, Raffaele Ragucci

Pyroliq 2019: Pyrolysis and Liquefaction of Biomass and Wastes

Europe is committed to have a bio-based economy in 2030. It follows that a huge contribution of biorefinery products on the European demand for chemicals, energy, materials and fibers is expected in the near future. To be environmentally and economically sustainable, biorefinery will need to be flexible, versatile, energy and cost efficient [1]. In a lignocellulose based biorefinery, the sugar platform that leads to bioethanol and added-value products through biochemical processes represents a challenging option. After ethanol distillation a lignin reach residue (LRR) is produced and used as energy source. However, it is currently underutilized with about 60% more lignin …

Comparison Among Technical And Milled Wood Lignins Through Principal Component Analysis Of Ftir Spectra, Manuel Garcia-Perez, Erika Bartolomei, Yann Le Brech, Anthony Dufour, Evan Terrell

Pyroliq 2019: Pyrolysis and Liquefaction of Biomass and Wastes

With the growth of biomass processing in biorefineries, there is an increasing need to develop rapid and simple methods for biomass characterization. One important component of biomass that is of signification interest in pyrolysis and liquefaction research is lignin, which is the world’s predominant source of renewable aromatic carbon. Due to its complex, heterogeneous nature and distinct variations among different biomass feedstocks, the characterization of lignins presents a unique challenge. In this study, we will show that clear divisions and comparisons can be made among a variety of lignins based on their FTIR spectra quantitatively assessed through principal component analysis …

Challenges And Progresses Made On The Microkinetic Description Of Lignin Liquefaction: Application Of Group Contribution Methods, Manuel Garcia-Perez, Evan Terrell, Linda Broadbelt

Pyroliq 2019: Pyrolysis and Liquefaction of Biomass and Wastes

In this presentation a comprehensive microkinetic modelling framework and experimental tools are used to describe product yield and composition of direct lignin liquefaction processes with and without solvents (See Figure 1). With the framework proposed we aim to develop a unified theory and models capable of describing both dry (pyrolysis) and wet (hydrothermal and solvolysis) lignin liquefaction processes. An important phenomenon that has been shown to occur during lignin pyrolysis (as well as cellulose) is the formation of a liquid intermediate phase, and subsequent ejection of heavy products (>~250 Da) as aerosols from this intermediate. In our presentation we …

Production Of Ethyl Acetate From Pyrolysis Of Lignin Model Compound Guaiacylglycerol-Β-Guaiacyl Using Tga-Ms, Mark J. Kelly, Andrew D. Ure, Stephen Dooley

Pyroliq 2019: Pyrolysis and Liquefaction of Biomass and Wastes

Due to the complex chemical structure of lignin, the fundamental chemistry underlying its pyrolysis behaviour is poorly understood. A detailed knowledge of this chemistry would allow for the construction of detailed predictive chemical kinetic models, which could be used to maximise the efficiency of the pyrolysis process.

Lignin is comprised of three monolignols, guaiacyl, p-hydroxyphenyl and syringyl. These are joined together by aryl ether linkages of which β-O-4 is the most common, representing approximately 50% of the linkages found in lignin.^[1] In this study, pyrolysis (20^oC/minute heating rate) was carried out on a lignin model compound, guaiacylglycerol-β-guaiacyl …