Aluminophosphate monoliths with high CO₂-over-N₂ selectivity and CO₂ capture capacity

Abstract

Aluminophosphate monoliths with high CO 2 -over-N 2 selectivity and CO 2 capture capacity. and N 2 adsorption data indicated that the AlPO 4 -53 monoliths had an extraordinarily high CO 2 -over-N 2 selectivity from a binary gas mixture of 15 mol% CO 2 and 85 mol% N 2 . The estimated CO 2 capture capacity of AlPO 4 -17 and AlPO 4 -53 monoliths in a typical pressure swing adsorption (PSA) process at 20 C was higher than that of the commonly used zeolite 13X granules. Under cyclic sorption conditions, AlPO 4 -17 and AlPO 4 -53 monoliths were regenerated by lowering the pressure of CO 2 . Regeneration was done without application of heat, which would regenerate them to their full capacity for CO 2 adsorption. RSC

Optimized cesium and potassium ion-exchanged zeolites A and X granules for biogas upgrading

“…The interaction between the cations and the CO 2 is higher as compared CH 4 due to the stronger polarizability and quadrupole moment of CO 2 . 41 The use of zeolites in industrial applications requires a strong macroscopic structure with good mechanical stability and hierarchical porosity which can provide a low pressure drop and rapid mass transfer kinetics. 42 High mechanical strength is crucial for the adsorbents as they undergo large and rapid pressure and thermal variations.…”

“…The interaction between the cations and the CO 2 is higher as compared CH 4 due to the stronger polarizability and quadrupole moment of CO 2 . 41 …”

Thin zeolite laminates for rapid and energy-efficient carbon capture

“…The biaxial tensile strength of the laminates is comparable to zeolite monoliths produced by PCP and by conventional processing methods incorporating significant amounts of inorganic binders 9, 18, 19, 22 . Biaxial strengths of 3 MPa are sufficient for low pressure swing adsorption processes where the pressure is altered between 1 bar and 6 bar 23, 24 . Moreover, in temperature swing based technologies, the binderless and homogeneous NaX laminates are expected to be superior to conventional laminates prepared with clay binders where the difference in thermal expansion between the clay and the zeolite could result in thermal cracking and degradation 25, 26 .…”

Carbon Capture From Flue Gas and the Atmosphere: A Perspective

“…It should be pointed out that with the advance of the technologies, some novel structured CO 2 adsorbents have emerged, such as thin film nanocomposites (Shah and Imae, 2016;Yong, 2016;Niranjana et al, 2019) and adsorbent-coated monoliths made of zeolites, MOFs, or carbons (Öhrman et al, 2004;Ramos-Fernandez et al, 2011;Akhtar et al, 2014;Lee et al, 2015). Monolithic contactors have substantial advantages like uniform flow, high gas throughput, low pressure drop, and less attrition in comparison with conventional packed-bed reactors (Rezaei and Webley, 2009;Rezaei and Webley, 2010).…”