Catalysis Communications 2018-04-12

Mechanistic investigation of NH3 oxidation over V-0.5Ce(SO4)2/Ti NH3-SCR catalyst

Wenshuo Hu, Shuo Zhang, Qi Xin, Renzhi Zou, Chenghang Zheng, Xiang Gao, Kefa Cen

Index: 10.1016/j.catcom.2018.04.010

Full Text: HTML

Abstract

NH3 oxidation over V-0.5Ce(SO4)2/Ti catalyst used for NH3-SCR was investigated and compared to that occurred over a commercial V-W/Ti catalyst. It was found that much more significant NH3 oxidation into N2 and N2O occurs over V-0.5Ce(SO4)2/Ti than commercial V-W/Ti catalyst at high temperatures (>300 °C). According to the kinetics and characterization results obtained, stronger surface redox properties and a relatively higher concentration of polymerized vanadates present on V-0.5Ce(SO4)2/Ti should contribute to its higher NH3 conversion values. In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies suggested the formation of -NH imido species, based on which a successive NH3 dehydrogenation-like mechanism is proposed, which consistently explains well the experimental observations.

Latest Articles:

Ag-(Mo-W)/ZrO2 catalysts for the production of propylene oxide: Effect of pH in the preparation of ZrO2 support

2018-04-10

[10.1016/j.catcom.2018.04.005]

Biomass carbon modified Z-scheme g-C3N4/Co3O4 heterojunction with enhanced visible-light photocatalytic activity

2018-04-09

[10.1016/j.catcom.2018.04.003]

Laccase-TEMPO as an efficient catalyst system for metal- and halogen-free aerobic oxidation of thioethers to sulfoxides in aqueous media at ambient conditions

2018-04-01

[10.1016/j.catcom.2018.03.032]

Controllable synthesis of bis[3-(dimethylamino)propyl]amine over Cr and Co double-doped Cu/γ-Al2O3

2018-03-29

[10.1016/j.catcom.2018.03.031]

Amino acid-paired dipyridine polymer as efficient metal- and halogen-free heterogeneous catalysts for cycloaddition of CO2 and epoxides into cyclic carbonates

2018-03-28

[10.1016/j.catcom.2018.03.030]

More Articles...