Carbon Dioxide and Nitrogen Adsorption on Cation-Exchanged SSZ-13 Zeolites

Abstract

Samples of high-silica SSZ-13, ion exchanged with protons and alkali-metal cations Li(+), Na(+), and K(+), were investigated using adsorption isotherms of CO(2) and N(2). The results show that Li-, Na-SSZ-13 have excellent CO(2) capacity at ambient temperature and pressure; in general, Li-SSZ-13 shows the highest capacity for N(2), CO(2) particularly in the low-pressure region. The effect of cation type and Si/Al ratio (6 and 12) on the adsorption properties was investigated through analysis of adsorption isotherms and heats of adsorption. The separation of CO(2) in a flue gas mixture was evaluated for these adsorbents in the pressure swing adsorption and vacuum pressure adsorption processes.

Transferable force-field for modelling of CO2, N2, O2and Ar in all silica and Na+exchanged zeolites

“…Nitrogen adsorption. Using partial atom charges (reproducing the N 2 quadrupole moment) and Lennard-Jones parameters for nitrogen molecule from the literature [37], as described above, we where able to reproduce quantitatively most of the experimental data availavle Comparison of computed and experimental adsorption isotherms of pure CO 2 in CHA zeolite with Si:Al = 6 at 303 K, MFI zeolite with Si:Al = 30 at 297 K and MFI zeolite with Si:Al = 117 at 298 K, where the experimental data are taken from Pham et al [63], Dunne et al [64] and Bao et al [66], respectively. for N 2 adsorption at ambient temperatures.…”

Conversion of Y into SSZ-13 zeolites and ethylene-to-propylene reactions over the obtained SSZ-13 zeolites

“…Recently, the SSZ-13 zeolite has attracted much attention because of its various applications in catalysis (such as DeNO x [1,2] and propylene production from ethylene [3], methanol-to-olefin [4]) and CO 2 adsorption [5,6]. SSZ-13 zeolites have been synthesized via various methods, including direct synthesis (from precursors of silica and alumina) and conversion of zeolite Y.…”

Adsorptive removal of carbon dioxide using polyethyleneimine loaded glass fiber in a fixed bed

“…The solid supports are normally porous materials with a high surface area and large pore volume (e.g., porous silica [16,17], activated carbon [18,19], zeolites [20,21], metal-organic frameworks (MOFs) [22,23] and some other materials, such as bentonite [24] and activated alumina [25]). …”