Mixed oxygen ionic‐carbonate ionic conductor membrane reactor for coupling CO₂ capture with in situ methanation

Abstract

CO 2 methanation is one of the vital reactions to utilize CO 2 and realize power to gas process. To decrease the CO 2 capture cost and alleviate the hot spots during the strong exothermic methanation reaction, here, we report a coupling of CO 2 capture process with in situ CO 2 methanation process through a ceramic-molten carbonate (MC) dual phase membrane reactor over the Ni-based catalyst. The performance of the membrane reactor was systematically investigated and compared with the traditional fixed-bed reactor. The results show that the performance of the membrane reactor is higher than that of the fixed-bed reactor, since the produced steam through the methanation process can be partially removed through the dual-phase membrane, which promotes the reaction shift to right side. A stability test shows no obvious degradation within 32 h. These results indicate that the membrane reactor is promising for coupling CO 2 capture with in situ methanation process.

Progress and Perspectives in the Development of Inorganic-Carbonate Dual-Phase Membrane for CO2 Separation

“…The results reveal that the CO 2 permeation flux in the membrane reactor with a 10% H 2 /He gas sweep is approximately four times higher (1.04 versus 4.25 mL•cm −2 •min −1 ) than that of a single CO 2 separation process utilizing pure He sweeping. Zhu et al [84] reported an SDC-carbonate dual-phase membrane reactor coupling of CO 2 separation with CO 2 methanation reaction over a Ni-based catalyst. In general, the carbonate dual-phase membrane reactors based on the first mode (refer to Figure 12a) primarily emphasize enhancing CO 2 capture through its coupling with the CO 2 reforming reaction.…”

Novel amino acid ionic liquids prepared via one‐step lactam hydrolysis for the highly efficient capture of CO2

“…This is in accordance with the general tendency of gas absorption in a liquid. 72 Because the solubility in [N 1111 ][Eaca] exceeds 0.5 mol of CO 2 per mole of the IL, it is reasonable to infer that both the equimolar and 2:1 mechanisms are responsible for the high absorption of CO 2 , as shown in Equations (7) and (8).…”

“…In the past two decades, CO 2 capture using ionic liquids (ILs) has attracted much attention, and has been recognized as a very promising technology. [5][6][7][8] New methods have been developed to capture CO 2 efficiently using ILs through chemical interactions. [9][10][11] ILs have their own unique properties that favor for practical applications.…”