The effect of HCl and steam on cyclic CO2 capture performance in calcium looping systems

Calcium looping is CO2 capture technology that considered to be technically feasible at an industrial scale using a variety of fuels such as natural gas, coals, biomass, refuse derived fuels, and biofuels. Unfortunately, many these contain significant quantities chlorine which principally converts gaseous HCl during combustion or gasification. To date, very few studies have examined the effect on sorbent performance calcium-based sorbents under realistic carbonation calcination conditions. In this work, experiments were conducted thermogravimetric analysis fixed bed reactor testing determine addition over repeated cycles Canadian limestone. The presence was found increase reactivity towards when steam injected calcination. resulting decomposition CaCl2 CaO caused changes in particle morphology, turn decreased diffusional resistance carbonation. Fixed test results provided confirmation full dechlorination typical oxy-fuel It shown both surface area pore volume higher tests where present greater than 99% could achieved without adversely affecting