Selective catalytic reduction of NO by H2/C3H6 over Pt/Ce1-xZrxO2-δ: The synergy effect studied by transient techniques

Metal–organic framework-derived CeO2–ZnO catalysts for C3H6-SCR of NO: an in situ DRIFTS study

“…27,28 The IR bands centered at 2950 cm À1 and 3091 cm À1 are attributed to the asymmetric and symmetric CH stretch (vCH) of the CH 3 group, which were proposed by Efstathiou et al to indicate the -CH 3 adsorbed species produced from the interaction of C 3 H 6 with the catalyst surface. 30 In addition, a large amount of gas phase CO 2 was observed at 2343 cm À1 and 2358 cm À1 . For the 3% CeO 2 -ZnO catalyst (Fig.…”

Improved NO reduction by using metal–organic framework derived MnOx–ZnO

“…Switching to C 3 H 6 /O 2 mixture, several new bands centered at 2973 and 2881 cm À1 were due to the asymmetric (n as ) and symmetric (n sym ) C-H stretching mode of CH 3 group, which had reported by Efstathiou' group to present -CH 3 group produced from the interplay between C 3 H 6 and the catalyst surface. 38 Furthermore, the new band recorded at the 1660 cm À1 is correspond to the enolic species (RCH]CH-O-). 38 Besides, the bands with high intensity at 2343 cm À1 and 2358 cm À1 generated aer C 3 H 6 admission were attributed to gas phase CO 2 .…”

“…38 Furthermore, the new band recorded at the 1660 cm À1 is correspond to the enolic species (RCH]CH-O-). 38 Besides, the bands with high intensity at 2343 cm À1 and 2358 cm À1 generated aer C 3 H 6 admission were attributed to gas phase CO 2 . The band at 3570 cm À1 was due to the n(OH) stretching of adsorbed H 2 O.…”

Transition metals cobaltites spinel for depollution of NOx emissions using SCR technology

“…The variation of composition of simulated gas mixture reported in the literature is as follows: NO (150–1100 ppm), C 3 H 8 (150–437.5 ppm), H 2 (0–1.5 %), NH 3 (0.02–0.2 %), and O 2 (2–10 %) in inert atmosphere. The composition of the gas mixture used in the present study is comparable to the given literature values for the SCR of NO x .…”