Enhanced activity and sulfur resistance of Cu- and Fe-modified activated carbon for the reduction of NO by CO from regeneration gas

Abstract

The reduction of NO by CO was proposed to apply in regeneration gas to remove the NOx from industrial flue gas with activated carbon purification technology. To improve the activity...

Mechanism of ammonium bisulfate deposition on V1M5/Ti catalysts with synergistic effects of V and M (M = Ce, Co, Fe, and Mn) in low-temperature NH3-SCR

“…The integral area of S 2p peaks can reflect the deposition amount of sulfur species. 38,39 The sulfate peak area is higher on V 1 M 5 /Ti than on V 1 /Ti, verifying that the transition metal sites on V 1 M 5 /Ti are sulfated by SO 2 . The highest sulfate peak area appears on V 1 Mn 5 /Ti, implying that deep sulfation occurs on Mn sites, resulting in serious deactivation.…”

Effect of Ni content on Cu–Mn/ZrO2 catalysts for methanol synthesis from CO2 hydrogenation

“…Additionally, peaks at around 350 °C were ascribed to the adsorption of CO at medium and strong binding sites. 45,46 Interestingly, enhanced CO adsorption at medium and strong binding sites was found for the CMNZ-0.01 catalyst. However, as the Ni : Cu ratio increased, the CO adsorption was gradually weakened.…”

Stability challenges and prospects for the industrial application of non‐noble catalysts for selective catalytic reduction of NOx by CO (CO‐SCR)

“…Therefore, enhancing the hydrophobicity of the catalyst can bolster its water resistance. [53] In addition, both structural and surface engineering approaches can serve as effective means to enhance the H 2 O resistance. For instance, transitioning MnCeOx catalyst from a nanoblock to a nanorod morphology has resulted in a marked improvement in water resistance.…”

“…For instance, in activated carbon-MÀ H catalysts, Fe 2 + ions can facilitate the reactions between CO and SO 2 , which effectively mitigates the sulfation of the catalytic active sites, thereby enabling the Fe-doped catalyst to achieve superior SO 2 resistance compared to catalysts doped with other elements such as Cu. [53] Enhancing the SO 2 resistance of catalysts through morphological and structural engineering is another prevalent approach. For instance, switching to an amorphous SiO 2 carrier significantly boosts the SO 2 resistance performance of Fe 2 Cu 1 / amorphous SiO 2 catalysts.…”

“…(b) Protective effect of Mg 2+ in the SO 2 poisoning experiment [29a] Reproduced from Ref. [29a] Copyright 2022, Elsevier B.V. (c) Protection mechanism of Cu and Fe in the AC−M‐H catalyst when SO 2 is present [53] Reproduced from Ref. [53] Copyright 2022, The Royal Society of Chemistry.…”