Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

Abstract

NOx is one of the most serious air contaminations, which mainly comes from fixed sources and have great negative impact on public health and regional air quality. The treatment of...

Promotion of SO2 resistance of Ce–La/TiO2 denitrification catalysts by V doping

“…5(e) shows the S 2p XPS spectra of the catalyst before and aer poisoning, in which peaks belonging to the spin-orbit components of S 6+ 2p 3/2 and S 6+ 2p 1/2 can be observed at 167.7-168 eV and 168.8-169 eV aer tting. This implies that S in +6 valence state was mostly present on the catalyst surface as SO 4 2− . 33,34 Aer poisoning, the XPS peaks of all elements on the catalyst changed to higher binding energies, showing that the electron cloud density around each element was lowered to varying degrees.…”

Promoting the effects of CuSO4 on N2 selectivity in selective catalytic oxidation of ammonia over Pt/TiO2 catalysts

“…19 The N 2 O is one of the main greenhouse gases and the NO x is one of the main air pollutants. 13,14 Thus, the N 2 selectivity over the catalyst was an important factor in NH 3 -SCO reaction. The N 2 selectivity of each catalyst is shown in Fig.…”

“…11 The N 2 O is one of the main greenhouse gases and NO x could lead to the a Department of Environmental Science and Engineering, School of Energy and formation of haze and ozone. 13,14 As a result, researchers have endeavored to develop catalysts with a high N 2 selectivity.…”

Sulfur and Water Resistance of Carbon-Based Catalysts for Low-Temperature Selective Catalytic Reduction of NOx: A Review

“…A review by Zhang et al comprehensively overviewed the progress of Mn-based catalysts in sulfur and water resistance and focused on analyzing the challenges and opportunities faced in the development of Mn-based catalysts [37]. A review by Xu et al provided the reaction mechanism of Ce-based catalysts for low-temperature NH 3 -SCR, and the technology to improve the resistance to sulfur and water was emphasized [38]. The recent review by Tang et al also summarized the research progress of Mn-based catalysts in improving the denitrification activity of NH 3 -SCR at low temperature and the resistance to sulfur and water, and the challenges and possible solutions for designing catalyst systems with high sulfur and water resistance were discussed in detail [39].…”