CO₂ chemisorption in Li₂CuO₂ microstructurally modified by ball milling: study performed with different physicochemical CO₂ capture conditions

Abstract

Lithium cuprate (Li 2 CuO 2 ) was obtained by a solid state reaction and a subsequent ball milling process; then, the samples were characterized structurally and microstructurally. Additionally, both the Li 2 CuO 2 ball milled and the solid state samples, for comparison purposes, were tested in the CO 2 chemisorption process at moderate and low temperatures under different reaction conditions: (i) at moderate CO 2 pressure and (ii) in the presence of water vapor. In both cases, the textural and microstructural properties of the ball milled Li 2 CuO 2 samples showed excellent CO 2 chemisorption properties which are significantly enhanced due to CO 2 pressure effects or the presence of water vapor. All these results were attributed to the textural and morphological changes evidenced in the samples. The observed surface area increments show preponderant effects during CO 2 chemisorption at low and moderate temperatures.

Low-Temperature and Fast Kinetics for CO2 Sorption Using Li6WO6 Nanowires

“…In the absence of oxygen supply from the air flow, oxygen atoms have to be released from the structure of lithium tungsten oxide, and this anionic crystalline diffusion could limit the carbonation process. 23 Our dynamic CO 2 sorption results indicate that Li 6 WO 6 with NW morphology has significant potential for CO 2 sorption at a range of high temperatures. The BET measurements indicate a surface area of 8.1 m 2 /g for NW powder.…”

“…In line with previous reports, for the case of lithium tungstate, the oxygen from air seems to assist the carbonation process on adsorbents. In the absence of oxygen supply from the air flow, oxygen atoms have to be released from the structure of lithium tungsten oxide, and this anionic crystalline diffusion could limit the carbonation process . Our dynamic CO 2 sorption results indicate that Li 6 WO 6 with NW morphology has significant potential for CO 2 sorption at a range of high temperatures.…”

Performance of Li4SiO4 Material for CO2 Capture: A Review

“…In the process of CCS, CO 2 is captured from flue gas and stored for utilization and sequestration instead of being released to the environment directly. Recent studies have found that various lithium-based materials, such as LiFeO 2 [6], Li 2 CuO 2 [7], Li 2 ZrO 3 [7,8,9], Li 8 SiO 6 [10,11], and Li 4 SiO 4 [9], are capable of effective CO 2 capture. Among these materials, Li 4 SiO 4 , with a variety of applications [12,13], has better application potential, owing to its higher CO 2 sorption capacity, cyclic stability than LiFeO 2 , Li 2 CuO 2 , and Li 8 SiO 6 , and lower cost than that of Li 2 ZrO 3 [9].…”

NiO CaO materials as promising catalysts for hydrogen production through carbon dioxide capture and subsequent dry methane reforming

“…In this line, recently it has been shown that different CO 2 sorbents [19] , i.e., Na 2 ZrO 3 can be used as bifunctional materials, acting first as a CO 2 captor and then as a catalytic material for methane reforming reaction, presenting a clearly advantages over the procedure proposed by Gorin and Retallik. Other CO 2 material captors, namely alkali (Li, Na and K) [20][21][22][23][24][25] and alkalineearth (Be, Mg and Ca) [26][27][28][29] metal-based ceramics have shown high ability for CO 2 capture. Therefore, all these ceramics may be promissory carbonated materials for hydrogen production through dry methane reforming.…”