Kinetics, released gases, and synergetic mechanisms of internal components during biomass pyrolysis

Pyrolysis behavior and volatile product evolution of biomass was investigated. • Kinetic parameters of biomass pyrolysis were estimated by various models. • Pseudo-component kinetics were calculated by the mathematical peak splitting. • Possible effects of each component in biomass on pyrolysis process were summarized. • The complex pyrolysis behavior of distinct biomasses and mechanisms were analyzed. This paper focuses on analyzing biomass pyrolysis processes and mechanisms. Thermogravimetric-mass spectrometric was conducted to investigate pyrolysis behavior and volatile product evolution of biomass feedstocks. This study investigates the pyrolysis of three types of biomass (FR, PW, WS) and their three main pure components (CE, HE, LN). In order to improve the accuracy of reaction models describing pyrolysis process of biomass, the method of mathematical peak splitting was introduced, and the kinetic parameters were calculated for each pseudo-component by the results obtained from peak splitting. A new research framework was established covering feedstock composition, pyrolysis processes, kinetics and reaction mechanisms. The possible effects of different contents of each component in biomass on the pyrolysis process provided a reference for predicting the pyrolysis behavior of different biomasses in industrial applications. With growing importance of biomass utilization under the carbon neutrality goal, our findings also facilitate the improvement of process variables and large-scale pyrolyser design. Download: Download high-res image (543KB) Download: Download full-size image