Correction: Promotional mechanism of enhanced denitration activity with Cu modification in a Ce/TiO-ZrO catalyst for a low temperature NH-SCR system.

[This corrects the article DOI: 10.1039/D1RA06325A.].

Promotional mechanism of enhanced denitration activity with Cu modification in a Ce/TiO-ZrO catalyst for a low temperature NH-SCR system.

This study aims to investigate the enhanced low temperature denitration activity and promotional mechanism of a cerium-based catalyst through copper modification. In this paper, copper and cerium oxides were supported on TiO-ZrO by an impregnation method, their catalytic activity tests of selective catalytic reduction (SCR) of NO with NH were carried out and their physicochemical properties were characterized. The CuCe/TiO-ZrO catalyst shows obviously enhanced NH-SCR activity at low temperature (<300 °C), which is associated with the well dispersed active ingredients and the synergistic effect between copper and cerium species (Cu + Ce ↔ Cu + Ce), and the increased ratios of surface chemisorbed oxygen and Cu/Cu lead to the enhanced low-temperature SCR activity.

Enhancement of catalytic activity in NH-SCR reaction by promoting dispersibility of CuCe/TiO-ZrO with ultrasonic treatment.

A series of CuCe-modified TiO-ZrO catalysts synthesized by stepwise impregnation method and ultrasonic-assisted impregnation method were investigated to research the removal of NO in the simulated flue gas. Results showed that the CuCe/TiO-ZrO catalyst prepared by ultrasonic-assisted impregnation method exhibited the superior NO conversion, in which higher than 85% NO was degraded at the temperature range of 250-400 °C and the highest NO conversion of 94% at 350 °C. It proves that ultrasonic treatment can markedly improve the performance of catalysts.

Simultaneous absorption of SO and NO from flue gas using ultrasound/Fe/heat coactivated persulfate system.

A novel process on simultaneous absorption of SO and NO from flue gas using ultrasound (US)/Fe/heat coactivated persulfate system was proposed. The influencing factors, active species, products and mechanism of SO and NO removal were investigated. The results indicate that US enhances NO removal due to enhancement of mass transfer and chemical reaction.