Role of Ce in promoting low-temperature performance and hydrothermal stability of Ce/Cu-SSZ-13 in the selective catalytic reduction of NOx with NH3

Efficient preparation and denitration performance of Cu/SAPO-34 catalyst

“…6b, it is supposed that Cu/SAPO-34 has a comparable acidic site compared to Con-Cu/SAPO-34, and it is deemed that acidity has little effect on NH 3 -SCR activity in the two samples. 27,28 The NH 3 -TPD results show that Cu/SAPO-34 also has a significant advantage in the number of acidic sites, with Cu/SAPO-34 (0.048 mmol g −1 ) > Cu/Con-SAPO-34 (0.033 mmol g −1 ). The increase in acidic sites will also lead to an improvement in the catalytic ability of the catalyst to catalyze NO.…”

The influence of H2O or/and O2 introduction during the low-temperature gas-phase sulfation of organic COS + CS2 on the conversion and deposition of sulfur-containing species in the sulfated CeO2-OS catalyst for NH3-SCR

“…At present, owing to the excellent oxygen storage capacity and significant redox properties, the cerium-based catalyst has been regarded as a viable substitution for the traditional NH 3 -SCR vanadium-based catalyst, but pure CeO 2 exhibited bad catalytic performance of NO x reduction based on poor surface acidity. 23 However, the sulfation treatment has been proposed to increase the acid sites and redox properties of CeO 2 and is a good strategy to optimize its NH 3 -SCR activity by promoting the adsorption and activation of NH 3 . 24–26 Yang et al found that the gas-phase sulfation increased the adsorption capacity of NH 3 efficiently and enhanced the separation of –NH 2 adsorption sites and oxidation sites on CeO 2 surface, which inhibited the catalytic oxidation of –NH 2 to NO, improving the NH 3 -SCR activity of CeO 2 catalyst.…”

Highly Efficient Ce and Co Codoped OMS-2 Catalyst for NO Oxidation

“…from the combustion of fossil fuels is damaging to humans and the environment . NO x in exhaust gas of combustion sources is primarily in the form of NO. , Selective catalytic reduction (SCR) with the addition of NH 3 as a reducing agent (NH 3 -SCR) is widely used for NO removal in the presence of O 2 . , NH 3 -SCR can operate more efficiently when NO is first oxidized to NO 2 . In addition, a NO/NO 2 mixture can be more easily absorbed by liquid .…”