Combined calcium looping and chemical looping combustion cycles with CaO–CuO pellets in a fixed bed reactor

Development of Suitable CuO-Based Materials Supported on Al2O3, MgAl2O4, and ZrO2 for Ca/Cu H2 Production Process

“…The ratio Cu/Ca in the process will be determined by the requirements in the calcination step 7 , and in order to reduce the thermal ballast of the inert fractions comprising the materials, it is necessary to maximize the active phase content of both the CaO based and the Cu-based materials 7,9 . Some recent works are oriented to the development of composite materials containing CaO and CuO [29][30][31][32][33][34] and/or CaO and Ni acting as reforming catalyst [35][36][37][38][39] . With respect to the CaO-CuO composites, the results indicate that the progress of the carbonation reaction in the combined material might affect negatively the kinetics of the oxidation reaction of Cu 31 .…”

“…The authors observed that the composites showed good reactivity for CuO but loss in CO 2 capture capacity after cycling. Moreover, the mechanical stability of the composite materials might be affected along cycling 34 , the route of synthesis and the Cu load in the material has on the stability in terms of oxygen transport capacity (OTC) of the solids along oxidation/reduction cycles has been evaluated. The materials have been tested in powder and also pellet form, the latter being the final form in which the material will be introduced in the process 9 .…”

Single stage H2 production, purification and heat supply by means of sorption-enhanced steam reforming of glycerol. A thermodynamic analysis

“…Two problems for this scheme could be (1) the regeneration temperature (a potentially new formulation of catalysts to operate within the range of temperatures surveyed could not resist a temperature of 1123 K); and (2) the sorbent capacity of CO 2 withdrawal decays after a few cycles (Barelli et al, 2007;He et al, 2010;Kavosh et al, 2014;Nikulshina et al, 2009;Ridha et al, 2015;Rodríguez et al, 2008;Stanmore and Gilot, 2005), so periodic sorbent bed renewal is to be expected, which in turn implies the disconnection of the reactor, the removal of aged sorption beds, their replacement and final reconnection to the parallel scheme.…”

Combined Calcium Looping and Chemical Looping Combustion for Post‐Combustion Carbon Dioxide Capture: Process Simulation and Sensitivity Analysis

“…The carbonation and oxidation reactions could be performed in the same reactor . The fixed‐bed experiments demonstrated that the oxidation of copper was feasible by using residual oxygen typically present in a combustion flue gas and at a temperature that also allowed carbonation to occur.…”

“…Thec arbonation and oxidation reactions could be performed in the same reactor. [51] Thef ixed-bed experiments demonstrated that the oxidation of copper was feasible by using residual oxygen typically present in ac ombustion flue gas and at at emperature that also allowed carbonation to occur. However,t he low quantity of oxygen present in the flue gas would not be sufficient to oxidize the calculated amount of copper circulating in the process and ad edicated air reactor was required.…”