Effects of calcination temperature on properties of Li2SiO3 for precursor of Li2FeSiO4

CO2 Capture at High Temperature Using Fly Ash-Derived Sodium Silicates

“…Based on previous studies, the infrared bands at ∼890 and 1020 cm −1 could be assigned to Si-O stretching vibration involving the Si-O-Si entity [27]. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 should imply a higher pH value [27]. Therefore, metastable structures such as meta-di-and piro-silicates can be beneficial to CO 2 sorption of the materials surface.…”

“…Na distribution in the calcination products can be tuned by increasing the calcination temperature, which can improve the diffusion of Na [27]. The CO 2 uptake profiles of Na-FA sorbents calcined at 600, 800 and 900°C are shown in Figure 8-a, which clearly indicates that these materials have a better CO 2 sorption capacity when calcined at 800°C.…”

Development of sodium/lithium/fly ash sorbents for high temperature post-combustion CO 2 capture

“…Also, alumina-silicates such as NaAlSiO 4 and aluminates (NaAlO 2 and Na 7 Al 3 O 8 ) were detected as expected from the fly ash composition ( Table 1). Presence of Li 2 Si 2 O 5 phase can be attributed to the insufficient reaction between the lithium compound and silicon compound [29]. Presence of SiO 3 2À and Si 2 O 5 2À can be an advantage for CO 2 sorption, since require less free energy to reverse the CO 2 capture reactions [28].…”

Electrical behaviour of ceramic breeder blankets in pebble form after γ-radiation

“…Considering the crystal lattice structure and following ab-initio suggestions [22] the conducting species are presumed to be Li + although O ions may be mobile to a certain extent. The creation of defects acting as traps [23] and the introduction of impurities during fabrication process, should alter the electronic band gap, resulting in a modification of the electrical conductivity [24]. The calculated band gap of 5.53 eV [25] at room temperature reveals the non-conductive nature of lithium orthosilicate.…”