Pre-combustion CO2 capture using ceramic absorbent and methane steam reforming

Publisher Summary Removal of carbon dioxide (CO2) from the high-temperature fuel gas of power plants is thought to be effective in separation of CO2 for reduction of CO2 in emissions. However, most CO2 removal techniques have poor heat-tolerance. This chapter presents a study in which a novel CO2 separation technique that employs the chemical reaction of lithium containing oxides with CO2 was developed. The novel separation technique employs the chemical reaction of lithium containing oxides, such as Li2ZrO3 and Li4SiO4, with CO2. Because this method is effective in the temperature range of 450°C to 700°C, it has the advantages of enabling CO2 separation in power plants without lowering the temperature and of absorbing CO2 from the steam–methane reforming process at the same time. Bench scale experiments were performed to measure the CO2 removal efficiency and methane conversion to evaluate the feasibility of the pre-combustion CO2 capture system. The results of these experiments indicate that pre-combustion CO2 capture combined with steam reforming is feasible.