The effects of high-pressure on the chemisorption process of CO2 on lithium oxosilicate (Li8SiO6)

CO2 chemisorption and evidence of the CO oxidation–chemisorption mechanisms on sodium cobaltate

“…In fact, this weight can be divided into two clear temperature ranges from 180 to 415°C and 415 to 740°C, corresponding to the superficial and bulk CO 2 chemisorption processes, respectively. This result is in agreement with other sodium and lithium ceramics where their respective dynamic thermograms exhibit one or two consecutive weight increments associated with the superficial and bulk CO 2 chemisorption processes followed by a final weight decrease associated with CO 2 desorption [7,11,15,[17][18][19][20][21][22][23][24]. In this sample, the first maximum weight increase, which was equal to 0.8 wt%, was observed at $400°C.…”

“…These processes may be of great interest for the design of separation systems from different flow gas effluents. Therefore, it is very important to understand the CO 2 capture properties of this ceramic even though the Na/Co molar ratio is not as high as that in other alkaline ceramics [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]47]. Based on this perspective, CO 2 chemisorption on sodium cobaltate was studied.…”

A review of CO2 adsorbents performance for different carbon capture technology processes conditions

“…13,93 The alkali-metal based CO 2 adsorbents have a porous structure with surface area of 0.09-442.1 m 2 g −1 and pore size of 0-20 nm. 162,163 Seggiani et al 164 studied the CO 2 adsorption performance of lithium orthosilicate (Li 4 SiO 4 ) with the addition of 30 wt.% potassium carbonate (K 2 CO 3 ) or sodium carbonate (Na 2 CO 3 ). Both Li 4 SiO 4 -carbonate adsorbents showed a CO 2 adsorption capacity of 5.23 mmol g −1 at an optimum adsorption temperature of 580 °C and low CO 2 partial pressure of 0.04 bar.…”

Adsorption of water induces a reversible structural phase transition and colour change in new nickel(ii) macrocyclic complexes forming flexible supramolecular networks

“…A continuous adsorption increment was observed, indicating the presence of big size porous, most probably, located in the outer layer of the compound. 38 To get a deeper insight into the adsorption process, water vapour isotherms of complex 1 were obtained as a function of the humidity percentage at 303, 313 and 333 K, using nitrogen as carrier gas ( figure 13). The adsorption process began at the same relative humidity percentage (RH %) and the saturation was reached almost at the same weight percentage, independently of applied the temperature.…”