Release Pattern of Light Aromatic Hydrocarbons during the Biomass Roasting Process

Abstract

Roasting is an important step in the pretreatment of biomass upgrading. Roasting can improve the fuel quality of biomass, reduce the O/C and H/C ratios in the biomass, and provide the biomass with a fuel quality comparable to that of lignite. Therefore, studying the structure and component evolution laws during biomass roasting treatment is important for the rational and efficient utilization of biomass. When the roasting temperature is 200–300 °C, the cellulose and hemicellulose in the biomass undergo a depolymerization reaction, releasing many monocyclic aromatic hydrocarbons with high reactivity. The proportion of monocyclic aromatic hydrocarbons in biomass roasting products can be effectively regulated by controlling the reaction temperature, residence time, catalyst, baking atmosphere, and other factors in the biomass roasting process. This paper focuses on the dissociation law of organic components in the pretreatment process of biomass roasting.

A Review of Computational Fluid Dynamics Modeling for Isobutane Alkylation: Process Optimization, Reactor Design, and Future Perspectives

“…The inherent rate of reaction is tremendously high as a result of the carbonium intermediate, which is extremely reactive, in the generally accepted mechanism . The interface surface area is influenced with respect to the proportion of the dispersed phase, mixing conditions conducted mechanically, and reactants and catalyst physicochemical characteristics, including interfacial tension, viscosity, and density . A prolonged catalyst–hydrocarbon mixture residence time leads to undesirable reactions, which adversely affect the performance of the alkylate.…”