%0 Journal Article
%T A Comparison of Hydrothermal Aging, SO<sub>2</sub> and Propene Poisoning Effects on NH<sub>3</sub>-SCR over Cu-ZSM-5 and Cu-SAPO-34 Catalysts
%A Kouadio Brou Albert
%A Koffi Konan Martin
%A Zran Van Eric-Simon
%A Horo Kone
%J Journal of Materials Science and Chemical Engineering
%P 10-28
%@ 2327-6053
%D 2024
%I Scientific Research Publishing
%R 10.4236/msce.2024.125002
%X This study was aimed to investigate the effects of hydrothermal aging, propene and SO<sub>2</sub> poisoning on the ammonia-selective catalytic reduction (NH<sub>3</sub>-SCR) performance of both Cu-SAPO-34 and Cu-ZSM-5. The catalytic activities of fresh, aged and poisoned samples were tested in ammonia-selective catalytic reduction (NH<sub>3</sub>-SCR) of NO<sub>x</sub> conditions. The XRD, TG and N<sub>2</sub>-desorption results showed that the structures of the Cu-SAPO-34 and Cu-ZSM-5 remained intact after 750˚C hydrothermally aged, SO<sub>2</sub> and propene poisoned. After hydrothermal aging at 750˚C for 12 h, the NO reduction performance of Cu-ZSM-5 was significantly reduced at lower temperatures, while that of Cu-SAPO-34 was less affected. Moreover, Cu-SAPO-34 catalyst showed high NO conversion with SO<sub>2</sub> or propene compared to Cu-ZSM-5. However, Cu-ZSM-5 showed a larger drop in catalytic activity with SO<sub>2</sub> or propene compared to Cu-SAPO-34 catalyst. The H<sub>2</sub>-TPR results showed that Cu<sup>2 </sup> ions could be reduced to Cu<sup> </sup> and Cu<sup>0</sup> for Cu-ZSM-5, while no significant transformation of copper species was observed for Cu-SAPO-34. Meanwhile, the UV-vis DRS results showed that CuO species were formed in Cu-ZSM-5, while little changes were observed for the Cu-SAPO-34. Cu-SAPO-34 showed high sulfur and hydrocarbon poison resistance compared to Cu-ZSM-5. In summary, Cu-SAPO-34 with small-pore zeolite showed higher hydrothermal stability and better hydrocarbon and sulfur poison resistant than Cu-ZSM-5 with medium-pore.
%K Hydrothermal Aging
%K Propene and SO&lt
%K sub&gt
%K 2&lt
%K /sub&gt
%K Poisoning
%K Ammonia-Selective Catalytic Reduction (NH&lt
%K sub&gt
%K 3&lt
%K /sub&gt
%K -SCR)
%K Cu-SAPO-34
%K Cu-ZSM-5
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=133431