A simulated rotary reactor for NOx reduction by carbon monoxide over Fe/ZSM-5 catalysts

A novel integrated rotary reactor for NOx reduction by CO and air preheating: NOx removal performance and mechanism

“…The temperature rises and change of concentration in the reduction zone could cause the rapid desorption of physically adsorbed NOx. NOx and CO also undergo redox reactions, leading to NOx reduction or the displacement of NOx by CO as observed in our earlier research 14,15. CO could be oxidized into CO 2 by either NOx or residue O 2 in the adsorption zone.…”

“…In the application for stationary sources, low NOx selectivity due to the high oxygen concentration in the flue gas strongly inhibited the NOx reduction efficiencies. 12,13 Rotary reactors were proposed to overcome the negative effect of oxygen by separating the NOx adsorption and NOx reduction to improve the performance of NOx removal 14,15 and excellent performance was achieved. 13,[16][17][18] Lower temperature and higher oxygen concentration are beneficial to NOx adsorption process, while high temperature without oxygen is beneficial to NOx reduction process.…”

“…13,[16][17][18] Lower temperature and higher oxygen concentration are beneficial to NOx adsorption process, while high temperature without oxygen is beneficial to NOx reduction process. 13,[19][20][21] The previously tested rotary reactor with separated NOx adsorption and reduction could well meet the different requirement of oxygen concentration, 13,16,17,22 but the demand of temperature was not considered. Another frequently used facility, rotary air preheater in the flue gas treatment process, is very interesting and attracted our attention.…”

Mn–Co binary oxides for low‐temperature catalytic oxidation of NO: effect of SO2 and regeneration

“…In recent years, NOx (mainly generated from fossil fuel and motor vehicle emissions) has contributed to environmental hazards, such as acid rain, the ozone layer hole, and photochemical smog, 1,2 hence, it has attracted extensive attention as one of the major air pollutants worldwide. Scholars have attempted many methods to control NOx emissions, and the current technologies used for NOx removal are selective catalytic reduction (SCR), [3][4][5] selective non-catalytic reduction (SNCR), 6 NOx storage reduction (NSR), 7 direct degradation of NO, [8][9][10] and three way catalyst (TWC). 11 Currently, NH 3 -SCR technology is being implemented around the globe to remove NOx from industrial flue gas exhausts.…”

The influence of support composition on the activity of Cu:Ce catalysts for selective catalytic reduction of NO by CO in the presence of excess oxygen

“…2,3 Selective catalytic reduction (SCR) is known as an efficient technique for NO x reduction to harmless N 2 . 4 Due to the co-existence of CO and NO in most of the exhaust gases, the reduction of NO by CO as a reducing agent (CO-SCR) has attracted more attention in recent decades. 2,[5][6][7] Noble metal catalysts as efficient catalysts for CO-SCR have been widely used; however, due to the unavailability and high cost of these metals, their practical application is limited.…”