Journal article Open Access
Nattacha Paksung; Jens Pfersich; Pablo J. Arauzo; Dennis Jung; Andrea Kruse
This study aims to investigate, how the morphology of cellulose gets influenced by the hydrolysis and carbonization during hydrothermal treatment at temperatures between 180 − 240 °C. The morphology of cellulose, especially different crystallinity and degree of polymerization, is represented by microcrystalline and α-cellulose. Kinetic analysis is considered as tool to allow the determination of the mechanisms of the two types of celluloses during the hydrothermal process. A kinetic model, in which cellulose was assumed to be hydrolyzed to limited extent, was proposed. Five scenarios were raised as models for pyrolysis of non-hydrolyzed cellulose that formed primary char, along with reaction pathways of hydrolyzable cellulose and its derivatives that latterly form secondary char. The morphologies of solid products were in good agreement with the results of the proposed model.