Tilbake til søkeresultatene

CLIMIT-Forskning, utvikling og demo av CO2-håndtering

Carbon Capture in Molten Salts

Tildelt: kr 4,4 mill.

In this project we show how molten inorganic halide salt based mixtures containing CaO may be utilized for selective capture and subsequent controlled release of carbon dioxide from diluted flue gases. Highly efficient absorption is demonstrated in fluori de based liquids, absorbing close to 100% of the CO2 from a simulated flue gas (1-14 % CO2) with an absorbing column height of only 10 cm. The residence time for the gas in the absorbing column is in the order of 1 second. >90% carbonation with >80% regen eration to CaO was recorded. Excellent cyclability has been achieved with a chloride based liquid with 60% carbonation and 100% regeneration to CaO during 10 cycles. The high efficiencies may enable extraction of CO2 from highly diluted gas mixtures. I dette prosjektet viser vi hvordan uorganiske saltsmelter innholdende CaO kan benyttes til karbonfangst fra gassblandinger inneholdende CO2. Svært effektiv absorpsjon er demonstrert i fluoridbaserte smelter der absorpsjonen er nær 100% (under deteksjonsg rense) for en simulert røykgass (1-14 % CO2) med en 10 cm lang absorpsjonskolonne. Oppholdstid for gassen i den absorberende kolonna er ca 1 sekund. >90% karbonering og >80% regenerering til CaO er observert i en fluoridbasert væske. 10 sykliske ab-/de sorpsjonsprosesser er blitt utført med ingen målbar degradering av sorbent i en kalsiumkloridbasert væske. En meget effektiv prosess åpner for rensing av svært fortynnede gassblandinger.

The proposed project addresses an alternative way to selectively capture CO2 from combustion exhaust gases for subsequent separate, controlled release. The method may be used in conjunction with sequestration and storage of CO2 from combustion of fossil fuels. Theoretical considerations based on fundamental chemical reaction kinetics, thermodynamics and thermodynamic data have been used for computer modelling the processes involved. Results from the modelling indicates that the method may be used for ca pture of CO2 from combustion of fossil fuels as in thermoelectric power generation. This application for a basic research grant aims at taking a fundamental process from the concept and modelling- to the experimental stage.

Budsjettformål:

CLIMIT-Forskning, utvikling og demo av CO2-håndtering