A pore level study of syngas production in two-layer burner formed by staggered arrangement of particles. (13th January 2020)

• Record Type: Journal Article
• Authors: Shi, Junrui; Mao, Mingming; Li, Houping; Liu, Yongqi; Lv, Jinsheng
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 3(2020)
• Page Start: 2331
• Page End: 2340
• Publication Date: 2020-01-13
• Subjects: Pore level -- Thermal nonequilibrium -- Porous media -- Syngas production -- Numerical simulation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.11.017
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A 2D model of simplified porous burner is developed to analyze the syngas production from fuel-rich CO2 /CH4 partial oxidation with detailed chemical kinetics GRI-Mech 1.2. The geometry simulates a two-layer burner, which is composed of 2.5 mm particles in the upstream and 7.5 mm particles in the downstream. A 2D packed bed of connected particles with staggered arrangement is developed. The discrete ordinates (DO) model is used to compute the surface to surface radiation and gas radiation. The solid conduction between the neighboring particles is taken into account by bridge approach. The predicted results are compared with experiment and good agreement between the predictions and experiment is observed. The effect of CO2 injection in the system is examined. It is demonstrated that 2D pore level simulations by simplified geometry with detailed chemical kinetics can capture the features of syngas compositions and temperature profiles. Local information of species, temperature and velocity distributions within pores in the burner is presented and analyzed. Results show that thermal nonequilibrium in the same particles exists in the entire burner, and that chemical nonequilibrium for the main syngas of H2, CO and CO2 is observed from exothermic zone to the burner outlet. Highlights: Prediction of syngas production in pore level with detailed chemical mechanism. Local information on species distribution within pores is presented and discussed. Pore level simulation captures the feathers of syngas production in two-layer burner. Thermal nonequilibrium in the same particles exists in the entire burner. Chemical nonequilibrium exists from the exothermic zone to the burner outlet.