SCR catalyst performance in flue gases derived from subbituminous and lignite coals

Benson, Steven A.; Laumb, Jason D.; Crocker, Charlene R.; Pavlish, John H.

doi:10.1016/j.fuproc.2004.07.004

Cited by 108 publications

(44 citation statements)

References 3 publications

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“…With more stringent regulation on NO x emission, NO x emission control becomes an important consideration in the design and modification of coal-fired utility boiler. NO x emission reduction is generally achieved using two approaches: combustion controls and post-combustion controls [1][2][3][4]. Combustion-controls reduce NO x emissions by altering or modifying the firing conditions, and post-combustion controls reduce NO x emissions by introducing a reagent into the flue gas stream to selectively react with NO x .…”

Section: Introductionmentioning

confidence: 99%

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Optimization of air staging in a 1 MW tangentially fired pulverized coal furnace

Suo

et al. 2009

Fuel Processing Technology

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Section: Introductionmentioning

confidence: 99%

“…NO x reduction efficiency of air staging ranges from 20% to 50%, and it depends on a boiler's initial NO x level, fuel combustion equipment design, and fuel type [3,11].…”

Section: Introductionmentioning

confidence: 99%

Optimization of air staging in a 1 MW tangentially fired pulverized coal furnace

Suo

et al. 2009

Fuel Processing Technology

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“…SO 3 reacts with NH 3 to form (NH 4 ) 2 SO 4 [2], NH 4 HSO 4 [3], and CaSO 4 [4]. These small particles, with a particle size <10 µm [5], with sticky ammonium sulfate particles, especially ammonium bisulfate, may clog the micropores of the catalyst surface [6,7] and stain and corrode the downstream devices of the SCR, such as the air preheater [8,9]. The combined presence of metal sites and SO x may also result in irreversible loss of active sites via metal sulfates formation [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research of an Active Solution for Modeling In Situ Activating Selective Catalytic Reduction Catalyst

et al. 2017

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Abstract:The effect of active solutions suitable for the in situ activation of selective catalytic reduction (SCR) catalysts was experimentally investigated using a designed in situ activation modeling device. To gain further insight, scanning electron microscopy (SEM), specific surface area analysis (BET), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS) analyses were used to investigate the effects of different reaction conditions on the characteristics of the deactivated catalysts. The activation effect of loading V 2 O 5 , WO 3 and MoO 3 on the surface of the deactivated catalysts was analyzed and the correlation to the denitrification activity was determined. The results demonstrate that the prepared activating solution of 1 wt % vanadium (V), 9 wt % tungsten (W), and 6 wt % molybdenum (Mo) has a beneficial effect on the deactivation of the catalyst. The activated catalyst resulted in a higher NO removal rate when compared to the deactivated catalyst. Furthermore, the NO removal rate of the activated catalyst reached a maximum of 32%. The activity of the SCR catalyst is closely linked to the concentration of the active ingredients. When added in optimum amounts, the active ingredients helped to restore the catalytic activity. In particular, the addition of active ingredients, the availability of labile surface oxygen, and the presence of small pores improved the denitrification efficiency. Based on these results, active solutions can effectively solve the problem of denitrification catalyst deactivation. These findings are a reference for the in-situ activation of the selective catalytic reduction of nitrogen oxides (SCR-DeNOx) catalyst.

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“…The two most prominent ways for removal of these air pollutants from combustion process are; gas cleaning technology and Selective Catalytic Reduction (SCR), with the latter being the area of interest lately because of the lower capital cost [5][6][7][8][9][10]. SCR exploits the reaction of NOx with ammonia to produce the environmentally friendly inert gas, nitrogen [5].…”

Section: Introductionmentioning

confidence: 99%

“…SCR exploits the reaction of NOx with ammonia to produce the environmentally friendly inert gas, nitrogen [5]. Many types of catalyst have been developed, tested, and used such as titanium dioxide-supported vanadium pentoxide, zeolite H-ZSM5 and 13X-APG, MoO3/TiO2-V2O5 honeycomb monolith and various combination of Pt, Pd, Rh, Au, Ag, Cu, Co, Fe, In and Ga metals with different supports of zeolite, Al 2 O 3 , SiO 2 and activated carbon [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

The potential for using a coconut shell catalyst for the selective catalytic reduction of NO_xgases

Yakub¹,

Sutan²,

Taufiq-Yap³

et al. 2014

Energy and Sustainability V

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Selective Catalytic Reduction (SCR) is a promising technique in mitigating the drawbacks of combustion system. This study investigated the potential of using coconut shell activated carbon (CSAC), an abundant and inexpensive resource, as an SCR catalyst support for sustainable energy generation. Local CSAC was physically treated by co-impregnating with Copper (Cu) and Manganese (Mn) oxides. The modified samples were then calcined under low temperature. Properties of all three types of samples were then characterized and analysed using Temperature-Programmed Reduction (TPR), X-Ray Fluorescence (XRF) and Fourier Transform Infrared (FT-IR). Results showed that CSAC can be an effective SCR catalyst to obtain higher conversion of NOx gases into non-toxic gas.

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SCR catalyst performance in flue gases derived from subbituminous and lignite coals

Cited by 108 publications

References 3 publications

Optimization of air staging in a 1 MW tangentially fired pulverized coal furnace

Optimization of air staging in a 1 MW tangentially fired pulverized coal furnace

Experimental Research of an Active Solution for Modeling In Situ Activating Selective Catalytic Reduction Catalyst

The potential for using a coconut shell catalyst for the selective catalytic reduction of NO_xgases

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SCR catalyst performance in flue gases derived from subbituminous and lignite coals

Cited by 108 publications

References 3 publications

Optimization of air staging in a 1 MW tangentially fired pulverized coal furnace

Optimization of air staging in a 1 MW tangentially fired pulverized coal furnace

Experimental Research of an Active Solution for Modeling In Situ Activating Selective Catalytic Reduction Catalyst

The potential for using a coconut shell catalyst for the selective catalytic reduction of NOxgases

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The potential for using a coconut shell catalyst for the selective catalytic reduction of NO_xgases