CO2–CO capture and kinetic analyses of sodium cobaltate under various partial pressures

Enhanced hydrogen production via assisted biomass gasification using lithium manganate as a bifunctional material

“…Indeed, a decrease in CO x partial pressure may compromise its capture by modifying the solid–gas interphase. 66–69 Furthermore, by comparing the H 2 /CO ratio with the that obtained in the glucose case, it depicted a considerably decrement and right shift, which was 4.3 at 615 °C. Consequently, the addition of Li 2 MnO 3 during the pyrolysis process did not only increase the production of H 2 , but also enhanced its purity.…”

Synthetic solid oxide sorbents for CO2 capture: state-of-the art and future perspectives

“…22.0-33.3 mol%) that is substantially below the stoichiometric capacity of 15 wt.%. 132 Similar to Li based sorbents, Na based sorbents can be prepared by solid-state reactions between metal precursors, e.g. Na 2 SiO 3 + NaOH, 133 Na 2 CO 3 + ZrO 2 , 134 and Na 2 CO 3 + CoCO 3 132 , as well as by wet-chemistry methods such as sol-gel synthesis.…”

“…132 Similar to Li based sorbents, Na based sorbents can be prepared by solid-state reactions between metal precursors, e.g. Na 2 SiO 3 + NaOH, 133 Na 2 CO 3 + ZrO 2 , 134 and Na 2 CO 3 + CoCO 3 132 , as well as by wet-chemistry methods such as sol-gel synthesis. 135,136 Na 4 SiO 4 was found to perform well above 750 °C, showing a maximum uptake of 19.2 wt.% (80.3 mol%, with a stoichiometric uptake capacity of 23.9 wt.%) at 840 °C.…”

“…3.3 wt.%, 22.0 mol% without doping). 132 The CO 2 uptake could be further improved to 11.1 wt.% (74.0 mol%) in the presence of 5% O 2 at 800 °C, because the presence of O 2 would stabilise the NaCoO 2 phase.…”