DeNOx of Nano-Catalyst of Selective Catalytic Reduction Using Active Carbon Loading MnOx-Cu at Low Temperature

Abstract

With the improvement of environmental protection standards, selective catalytic reduction (SCR) has become the mainstream technology of flue gas deNOx. Especially, the low-temperature SCR nano-catalyst has attracted more and more attention at home and abroad because of its potential performance and economy in industrial applications. In this paper, low-temperature SCR catalysts were prepared using the activated carbon loading MnOx-Cu. Then, the catalysts were packed into the fiedbed stainless steel micro-reactor to evaluate the selective catalytic reduction of NO performance. The influence of reaction conditions was investigated on the catalytic reaction, including the MnOx-Cu loading amount, calcination and reaction temperature, etc. The experimental results indicate that SCR catalysts show the highest catalytic activity for NO conversion when the calcination temperature is 350 °C, MnOx loading amount is 5%, Cu loading amount is 3%, and reaction temperature is 200 °C. Under such conditions, the NO conversion arrives at 96.82% and the selectivity to N2 is almost 99%. It is of great significance to investigate the influence of reaction conditions in order to provide references for industrial application.

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

“…In order to improve the denitration activity and enhance the anti-toxic ability of the catalysts, the finding of suitable supports and active components is necessary [50]. The research progress of SO 2 and H 2 O resistant carbon-based catalysts was introduced as follows [51,52].…”

“…Due to the advantages of abundant surface groups, large specific surface area, high porosity, and strong adsorption capacity, activated carbon/coke (AC) has attracted extensive attention and is widely used as catalyst support [51]. As shown in Figure 6, the reaction of NO on MnO x -Cu/AC catalysts follows both L-H and E-R mechanisms.…”

Selective catalytic reduction of NO x with NH3 assisted by non-thermal plasma over CeMnZrO x @TiO2 core–shell catalyst

“…The discharge power of the DBD reactor was determined by checking the charge-voltage (Q-U) Lissajous, and the specific energy input of the NTP system was calculated in the following equations (7) and (8).…”

“…Previous studies have reported that Ce-and Mn-based SCR catalysts boast remarkable lowtemperature activity on account of their superior performance in the store-release of O and excellent redox ability. However, they are easily deactivated in the presence of SO 2 because (NH 4 ) 2 SO 4 , NH 4 HSO 4 and metal sulfates can block and destroy the active sites [7,8]. In these circumstances, constructing an SCR catalyst with core-shell structure could improve the SO 2 tolerance effectively [9][10][11].…”

NO x storage and reduction assisted by non-thermal plasma over Co/Pt/Ba/γ-Al2O3 catalyst using CH4 as reductant

“…Therefore, the mitigation emission of NO x is of paramount importance on account of its negative impacts. During the past decades, numerous efforts have been devoted towards finding adequate solutions to remove NO x in order to fulfill the stricter regulations [1][2][3][4][5][6]. Compared to other internal combustion engines, the lean-burn engine has attracted widespread attention because it could improve the fuel efficiency by up to 20%-30%.…”