Influence of CO2 gas on the rate and kinetics of HCl, SO2, and NO2 gas removal by Mg-Al layered double hydroxide intercalated with CO32−
Source abstract
Abstract
Abstract This study investigates the influence of CO2 gas on the treatment of single acidic gases (HCl, SO2, and NO2) using Mg Al layered double hydroxide intercalated with CO32− (CO3·Mg-Al LDH) as the adsorbent. The gas-removal kinetics is analyzed, and the reaction mechanisms are discussed. The coexisting CO2 gas decreased the removal rate of all three acidic gases. This is likely due to the exchange reaction between intercalated CO32− and gas-phase CO2, which inhibits the exchange between intercalated CO32− and HCl, SO2, or NO2. The HCl removal by CO3·Mg-Al LDH follows pseudo first order kinetics, suggesting that the main removal mechanism is chemisorption (chemical reaction between CO3·Mg-Al LDH and HCl). Meanwhile, the removal of SO2 and NO2 by CO3·Mg-Al LDH also follows pseudo first order kinetics. However, the corresponding adsorption mechanisms are classified as physisorption onto the Mg Al LDH.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Industrial Gas Emission Control · Covalent Organic Framework Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
Show source-provided references
1. Kinetics of ammonia consumption during the selective catalytic reduction of NOx over an iron zeolite catalyst10.1016/j.apcatb.2014.06.039 ↗
2. Facile synthesis of 3D Mg-Al layered double oxide microspheres with ultra high adsorption capacity towards methyl orange10.1016/j.matlet.2019.126695 ↗
3. Hydrotalcite-type anionic clays: preparation, properties and applications10.1016/0920-5861(91)80068-K ↗
4. Catalytic oxidation of NO over MnO2 with different crystal structures10.1039/C6RA10103H ↗
5. High catalytic activity of Mn-based catalyst in NO oxidation at low temperature and over a wide temperature span
6. Removal of SO2 and NOX from stack gas by reaction with calcium hydroxide solids
7. In-situ DRIFTS for the mechanistic studies of NO oxidation over a-MnO2, b-MnO2 and c-MnO2 catalysts10.1016/j.cej.2017.04.006 ↗
8. Improving sulfate attack resistance of concrete by using calcined Mg-Al-CO3 LDHs: adsorption behavior and mechanism10.1016/j.conbuildmat.2019.117256 ↗
9. Review of second-order models for adsorption systems10.1016/j.jhazmat.2005.12.043 ↗
10. A comparison of chemisorption kinetic models applied to pollutant removal on various sorbents10.1205/095758298529696 ↗
11. Kinetic models for the sorption of dye from aqueous solution by wood10.1205/095758298529326 ↗
12. Dynamic breathing of CO2 by hydrotalcite10.1021/ja4099752 ↗
13. New method of treating dilute mineral acids using magnesium-aluminum oxide10.1016/S0043-1354(02)00374-3 ↗
14. Treatment of hydrochloric acid using Mg–Al layered double hydroxide intercalated with carbonate10.1016/j.jiec.2016.04.018 ↗
15. New principals on the adsorption of alkyl compound by Mg-Al oxide: Adsorption kinetics and equilibrium studies10.1016/j.colsurfa.2016.10.063 ↗
16. Mg−Al layered double hydroxide intercalated with CO32− and its recyclability for treatment of SO210.1016/j.clay.2019.105349 ↗
17. Simultaneous treatment of HCl–SO2–NOx gas with Mg–Al layered double hydroxide intercalated with CO32− and its recycling process
18. Treatment of NOx using recyclable CO32−-intercalated Mg–Al layered double hydroxide10.1016/j.apr.2019.07.018 ↗
19. Treatment of HCl gas by cyclic use of Mg–Al layered double hydroxide intercalated with CO32−10.1016/j.apr.2019.11.001 ↗
20. Treatment of NO by a combination of MnO2 and a CO32−-intercalated Mg–Al layered double hydroxide10.1007/s42452-020-2893-y ↗
21. Adsorption of hydrochloric acid on solid slaked lime for flue gas clean up10.1080/00022470.1981.10465343 ↗
22. HCl removal characteristics of calcium hydroxide at the dry-type sorbent reaction accelerator using municipal waste incinerator flue gas at a real site10.1007/s11814-016-0306-0 ↗
23. Characterization of lead sorption by the natural and Fe(III)-modified zeolite10.1016/j.apsusc.2013.07.016 ↗
24. Adsorption and mechanistic study for phosphate removal by rice husk-derived biochar functionalized with Mg/Al-calcined layered double hydroxides via co-pyrolysis10.1016/j.compositesb.2019.107209 ↗
25. Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides10.1180/minmag.2012.076.5.10 ↗
26. Anion-exchange properties of hydrotalcite-like compounds10.1346/CCMN.1983.0310409 ↗
27. Hydrogen chloride removal from flue gas by low-temperature reaction with calcium hydroxide10.1021/acs.energyfuels.7b03292 ↗
28. Rapid exchange between atmospheric CO2 and carbonate anion intercalated within magnesium rich layered double hydroxide10.1021/am5060405 ↗
29. Simultaneous removal of SOx and NOx using slaked lime at low temperature10.1021/ie010914+ ↗
30. NH3-SCR performance of fresh and hydrothermally aged Fe-ZSM-5 in standard and fast selective catalytic reduction reactions10.1021/es304421v ↗
31. Relationship between structure and performance of a novel highly dispersed MnOx on Co-Al layered double oxide for low temperature NH3-SCR10.1016/j.apcatb.2019.117983 ↗
32. Enhancing DeNOx performance of CoMnAl mixed metal oxides in low-temperature NH3-SCR by optimizing layered double hydroxides (LDHs) precursor template10.1016/j.apsusc.2018.10.191 ↗
33. Kinetic study of adsorption of Cu(II) and Pb(II) from aqueous solutions using manganese oxide coated zeolite in batch mode10.1016/j.colsurfa.2006.01.008 ↗