ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A novel CO2 separation technique that employs the chemical reaction of lithium-containing oxides withCO2 has been developed. Since this method is effective in the temperature range of 450oC to 700oC, it has theadvantages of enabling CO2 separation in power plants without lowering the temperature and of absorbing CO2from the steam-methane reforming process at the same time. Because the absorption is exothermic and the steamreforming is endothermic, the energy loss is expected to be significantly reduced by combining the reactions.Hydrogen yields are expected to be higher because the equilibrium may be shifted by the removal of the CO2 byproduct.We have therefore proposed a pre-combustion CO2 capture system using lithium silicate and steamreforming. Bench-scale experiments were performed to measure the methane conversion and CO2 removalefficiency in order to evaluate the feasibility of the pre-combustion CO2 capture system. At temperatures of lessthan 650oC, the methane conversion in the case of mixture of catalyst and absorbent was higher than that in thecase of catalyst alone. In addition, the CO2 removal efficiency is almost 90%. These results appear to indicate thatpre-combustion CO2 capture combined with steam reforming is feasible
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.317-318.81.pdf
Permalink