Insight into CO selective chemisorption from syngas mixtures through Li₂MnO₃; a new H₂enrichment material

Abstract

Carbon oxides separation from a hydrogen stream is essential to achieve ideal energy systems. In this context, lithium manganate (Li2MnO3) is the first alkaline ceramic reported for the selective chemisorption...

Enhanced H2 production through biomass pyrolysis by applying alkaline ceramic lithium cuprate (Li2CuO2) as a bifunctional material

“…Besides, at 450 °C, CO 2 capture kinetics are thermally enhanced, promoting the H 2 production due to the Le Châtelier principle. [32][33][34] However, between 500 and 700 °C H 2 increments may resulted from combining three processes, enhanced by temperature: (i) thermal decomposition of by-products from glucose pyrolysis, 35,36 (ii) oxygen availability from the crystal framework that may induce the decomposition of by-products into H 2 O and CO 2 , the presence of which may promote a reforming reaction, 37,38 and (iii) CO oxidation and capture from this material that may shi the reaction equilibrium to H 2 formation. 33,39 These results are in good agreement with the supplied data in the ESI (see ESI Fig.…”

Probing room-temperature reactivity of H2S, SO2, and NO on the Li2MnO3 crystal surface by experimental and first-principles studies

“…According to previous reports, Li 2 MnO 3 ceramic was synthesized through the reaction (eqn (3)). 23,24 Li 2 O (s) + MnO (s) + 1/2O 2(g) -Li 2 MnO 3(s)…”

“…According to previous reports, Li 2 MnO 3 ceramic was synthesized through the reaction (eqn (3)). 23,24 Li 2 O (s) + MnO (s) + 1/2O 2(g) → Li 2 MnO 3(s) To confirm the success of the synthesis, the obtained powder was structurally and microstructurally characterized. The SEM micrograph of the synthesized sample shows densely packed agglomerates of small polyhedral faceted microparticles (Fig.…”

“…20,21 Besides being highly suitable for energy storage applications, Li 2 MnO 3 has found new applications in the selective chemisorption of CO gas at elevated temperatures. [22][23][24] The adsorbed CO molecules react with the lattice oxygen, which is coupled with a partial reduction of Mn 4+ ions to Mn 3+ and Mn 2+ . However, the CO oxidation reaction is possible at mid-to-high temperatures.…”

Scrutinizing the CO Chemical Capture Path in Li2MnO3 Samples with Different Microstructural Properties

“…Even more, it has been evidenced that this ceramic does not trap CO 2 under any condition, neither CO in oxidative atmospheres. Moreover, its selective CO chemisorption capability in syngas mixtures has been reported. − These particular reactive properties position Li 2 MnO 3 as a promising option in industrial systems where CO has to be selectively captured and separated from H 2 . normalL normali 2 Mn normalO 3 + 1 2 CO → 1 2 normalL normali 2 normalC normalO 3 + ( LiMn O 2 + 1 2 CO ) → 1 2 normalL normali 2 normalC normalO 3 + MnO …”