Application of Core-Shell-Structured K₂CO₃-Based Sorbents in Postcombustion CO₂ Capture: Statistical Analysis and Optimization Using Response Surface Methodology

Abstract

This study investigates the effect of core-shell-structured supports prepared with alumina as the core on the CO 2 capture performance of K 2 CO 3 . One main issue in using alumina-basedsupported K 2 CO 3 is the high moisture uptake of the sorbent, which converts active sites of K 2 CO 3 to hydrated by-products with a very low CO 2 capture capacity. To address this issue, the support was shelled with a less hydrophilic material using a core-shell technique. Six core-shell-structured supports were prepared using alumina-based cores (γ-alumina and Boehmite), and TiO 2 , ZrO 2 and SiO 2 shells. K 2 CO 3 was impregnated on each support and tested in a thermogravimetric analyzer over ten cycles. K 2 CO 3 /Boehmite/TiO 2 showed the lowest moisture uptake and the highest surface area, and thus the best CO 2 capture performance. A semi-empirical model was developed using a response surface methodology

Big Data Analysis and Technical Review of Regeneration for Carbon Capture Processes

“…Alkali-metal oxide/carbonate solid sorbents (Na 2 O/Al 2 O 3 , K 2 CO 3 , Na 2 CO 3, K 2 CO 3 /Al 2 O 3 , K 2 CO 3 /MgO) have been widely studied in pre- and postcombustion capture processes. − These sorbents are commonly used in chemical looping processes, which are described in detail in section . The important feature regarding the precombustion application is the CO 2 /H 2 separation process and technology.…”

CO2 capture by benzene‐based hypercrosslinked polymer adsorbent: Artificial neural network and response surface methodology

“…In recent years, mathematical modelling of adsorption systems has increased dramatically. [ 26,52–61 ] Bararpour et al investigated CO 2 uptake by K 2 CO 3 modified γ‐alumina and boehmite‐based solid sorbents at different operational conditions; then, the effects of some parameters including carbonation temperature, carbonation time, and H 2 O/CO 2 ratio on adsorption capacity were evaluated as a semi‐empirical model based on the response surface methodology (RSM) approach, and the optimal operational condition was determined. [ 52 ] Streb and Mazzotti developed an ANN‐multi layer perceptron (MLP)‐based model for CO 2 adsorption from various streams.…”

“…[26,[52][53][54][55][56][57][58][59][60][61] Bararpour et al investigated CO 2 uptake by K 2 CO 3 modified γ-alumina and boehmite-based solid sorbents at different operational conditions; then, the effects of some parameters including carbonation temperature, carbonation time, and H 2 O/CO 2 ratio on adsorption capacity were evaluated as a semi-empirical model based on the response surface methodology (RSM) approach, and the optimal operational condition was determined. [52] Streb and Mazzotti developed an ANN-multi layer perceptron (MLP)-based model for CO 2 adsorption from various streams. [62] Ghalandari et al provided an ANN-MLPbased model aiming to measure the gas uptake capability of AC from a mixture of the CO 2 , N 2 , and CH 4 gases.…”

Self-Assembled Core–Shell Structure MgO@TiO2 as a K2CO3 Support with Superior Performance for Direct Air Capture CO2

“…32 A core−shell configuration between the active component and the supporter may restrict the production of intermediate products and greatly improve the regeneration performance of the adsorbents. 35 In this work, micron-MgO precursors were first prepared through the sol−gel method and then K 2 CO 3 /MgO (KM) was prepared using MgO as the support. Subsequently, K 2 CO 3 − MgO@TiO 2 core−shell materials (SA-KM@T) with K 2 CO 3 impregnation, MgO support, and TiO 2 as shell stabilizers were prepared with different potassium loading.…”