Effect of CaCO₃on catalytic activity of Fe–Ce/Ti catalysts for NH₃-SCR reaction

Abstract

In the present work, fresh and Ca poisoned Fe–Ce/Ti catalysts were prepared and used for the NH3-SCR reaction to investigate the effect of Ca doping on the catalytic activity of catalysts.

Bifunctional CaCO3/HY Catalyst in the Simultaneous Cracking-Deoxygenation of Palm Oil to Diesel-Range Hydrocarbons

“…The decreased surface area is caused by the metal agglomeration of CaCO3, while the decrease in the pore volume of the catalyst was caused by the micropore filling by CaCO3 particles during the impregnation process (Liu & Corma, 2018). According to research by Wang et al (2020) the addition of CaCO3 results in a reduction in surface area and pore volume, which is consistent with the results in this investigation. It is conceivable for an uneven metal distribution on the catalyst surface to occur during the impregnation process when a relatively high metal concentration causes ion competition near the pore opening (Anggoro et al, 2017).…”

Low‐Temperature NH3 Selective Catalytic Reduction Performance Enhancement of Fe‐Based Oxides by Employing Carbon Nanotubes to Decorate the MgFe‐LDH

“…It can be inferred from these results that CNTs doping can induce the decreased activation of NH 3 on Mg 3 Fe 1 ‐LDO. As reported before that the easily activated NH 3 can be beneficial to low temperature NH 3 ‐SCR reaction [33] . By integrating desorption peak of samples (listed in Table 2), it was obtained that Mg 3 Fe 1 ‐LDO showed more strong acid sites than other catalysts, thus leading to enhanced high‐temperature catalytic performance.…”

“…As reported before that the easily activated NH 3 can be beneficial to low temperature NH 3 -SCR reaction. [33] By integrating desorption peak of samples (listed in Table 2), it was obtained that Mg 3 Fe 1 -LDO showed more strong acid sites than other ChemistrySelect catalysts, thus leading to enhanced high-temperature catalytic performance. Although it has the maximum NH 3 desorption amount, Mg 3 Fe 1 -LDO exhibited the worst catalytic activity due to its poor redox properties.…”

Promotional mechanism of enhanced denitration activity with Cu modification in a Ce/TiO2–ZrO2 catalyst for a low temperature NH3-SCR system

“…3,4 Traditional commercial vanadium-titanium catalysts have been used in various industrial elds due to their stability and high efficiency, but industrial application is still restrained by their inevitable drawbacks, including high operation temperature window, poisoning and deactivation of catalyst by deposited alkaline metal, and vanadium poisoning. [5][6][7] Therefore, it is necessary to develop NH 3 -SCR catalysts with excellent denitration activity in low temperature ranges.…”