CO₂ Capture Performance of Calcium‐Based Sorbents in the Presence of SO₂ under Pressurized Carbonation

Abstract

In order to understand the effect of SO 2 on the CO 2 capture performance under pressurized carbonation conditions, tests by orthogonal design were carried out in a calcination/pressurized carbonation reactor system. The effects of variables such as carbonation temperature, carbonation pressure, SO 2 concentration, CO 2 concentration, and the number of cycles on carbonation and sulfation were investigated. A range method was employed for analysis. Phase structure and scanning electron microscopy images were measured as supplement for a reaction study. Temperature increase enhanced the SO 2 capture, leading to a rapid decay in CO 2 uptake. The carbonation pressure had a stronger effect on the CO 2 uptake than the temperature. SO 2 uptake increased rapidly with increasing pressure while CO 2 uptake decreased.

Thermochemical Heat Storage Performance of CaO Pellets Fabricated by Extrusion–Spheronization under Harsh Calcination Conditions

“…Figure illustrates the effects of the carbonation pressure, carbonation temperature, and particle size on the heat storage capacity of the CaO pellets based on the orthogonal experiments under harsh calcination conditions. A higher R i means that the effect of the factor i is stronger . The average carbonation conversion and average heat storage density of the sample for each level are calculated by eqs and , respectively, as follows: where X ave is the average carbonation conversion of the sample for each level during N TCHS cycles and E g,ave is the average heat storage density of the sample for each level during N TCHS cycles (kJ/kg).…”

“…A higher R i means that the effect of the factor i is stronger. 47 The average carbonation conversion and average heat storage density of the sample for each level are calculated by eqs 6 and 7, respectively, as follows:…”

Increasing Porosity of Molded Calcium‐Based Sorbents by Glucose Templating for Cyclic CO2 Capture

“…Unfortunately, the drop of CO 2 capture capacity of the CaO‐based sorbents and the attrition of the particles , during the CaL process are the two primary issues that should be considered. It is well‐accepted that thermal sintering at high temperatures will spoil the CO 2 capture capacity of the sorbents.…”

Natural Calcium‐Based Residues for Carbon Dioxide Capture in a Bubbling Fluidized‐Bed Reactor

“…Additionally, the CO 2 ‐capture performance depends on the solid sorbent surface area, pore structure, chemical composition (impurities or additives), calcination temperature, calcination and carbonation duration time, reactor type, and CO 2 concentration during the calcination process , . The CO 2 capture capacity of the CaO sorbent decreased with the cycles of operation , . Therefore, a better regeneration or desorption method was investigated.…”