Simulation of Biomass Chemical Looping to Capture Carbon Coupled to Ammonia Production

Abstract

This work develops a process for CO2 capture by biomass chemical looping combustion coupled with chemical looping hydrogen production to ammonia using Aspen Plus software. By using pine wood biomass and water as feedstock and ammonia as end product, the influence of key parameters on the system performance is explored through a combination of process simulation and sensitivity analysis, and the optimal operating parameters are determined: OC/B=9, fuel reactor (FR) temperature is 900°C, S/B=4, hydrogen reactor (HR) temperature is 600°C, AIR/B=1.5 and NH3 reactor (NR) temperature and pressure are 300 °C and 150 bar, respectively. H2 yield of 7.54% and NH3 yield of 32.6% are obtained; the total exergy efficiency for the system is 70.6% at 92% CO2 capture efficiency, and the energy consumption is 155.3kw.

Keywords: biomass chemical looping combustion, CO2 capture, Hydrogen, ammonia