Chemical looping gasification of lignocellulosic biomass with iron-based oxygen carrier: Products distribution and kinetic analysis on gaseous products from cellulose

Abstract

Product distribution and kinetics analysis of chemical looping gasification (CLG) of cellulose with Fe2O3 were investigated. Based on the thermodynamic simulation, the optimum vaporization temperature of the product H2 was 850 °C. The influence of reaction temperatures and oxygen carrier mixing ratios on product distribution were explored via tube furnace reactor combined with on-line mass spectrometry. When the Fe2O3 mixing ratio was 10%, the gas phase product content was the highest, which may be caused by the incomplete oxidation transition to complete oxidation. Kinetic parameters such as the activation energy of the gas phase product were obtained by an isoconversion method. The CLG process could reduce the activation energy of gaseous products of CO2, CH4, and H2, and the activation energy of CO2 (79.21 kJ/mol) was the highest. Characterization of solid phase products analyzes using SEM. The solid phase product content decreases slightly with increasing temperature because of the higher carbon conversion at elevated temperatures. As the Fe2O3 blending ratio increased, the surface morphology of CE changed from bulk to relatively loose structure, and the particles also aggregate, which may be beneficial to the reaction. This paper provides a reference for clarifying the thermodynamics and kinetics of chemical looping gasification of biomass organic components.