Influence of NO2 and SO2 on the specific resistance of dust in flue gas

Zhang, Pan; Yao, Yuan; Li, Yan-Kun; Yuan, Shaoyu; Qi, Liqiang

doi:10.1007/s11356-019-05197-9

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…The vanadium content decreased from 0.950 to 0.719%. This is consistent with the sulfuric acid regeneration process of alkali metal-poisoned catalyst studied in Sun, 38 and the vanadium element was reduced by 22.6%.…”

Section: Selection Of Representativementioning

confidence: 99%

Regeneration of Selective Catalyst Reduction Catalysts Deactivated by Pb, As, and Alkali Metals

Zhang

Chen

et al. 2020

ACS Omega

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Owing to increased operating time and Pb, As, and alkali metal poisoning of a catalyst, the activity of the catalyst is lowered. In the present study, we utilized the acetic acid and the traditional sulfuric acid pickling process for regeneration and then performed Brunauer–Emmett–Teller (BET) specific surface area, denitrification efficiency, scanning electron microscopy, and X-ray fluorescence (XRF) analysis of a fresh catalyst, a deactivated catalyst, and a regenerated catalyst for comparison purposes. The experimental results demonstrated that the removal ratios of Pb, As, Na, and K were 99.2, 98.8, 99.9, and 93.9%, respectively. Compared to the traditional sulfuric acid regeneration technology, the acetic acid regeneration technology eliminates the activated liquid immersion step; therefore, the steps are simpler and efficient for the regeneration of selective catalyst reduction catalysts deactivated by Pb, As, and alkali. The current study provides a new method for the regeneration and application of selective catalyst reduction (SCR) catalysts, which is particularly applicable for regenerating a large number of Pb, As, and alkali-metal poisoned catalysts.

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Section: Selection Of Representativementioning

confidence: 99%

Regeneration of Selective Catalyst Reduction Catalysts Deactivated by Pb, As, and Alkali Metals

Zhang

Chen

et al. 2020

ACS Omega

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“…The flue gas emitted from coal-fired power plants contains a large amount of particulate matter, SO 2 , and NO x , which pose a threat to human health and the environment. − Traditional flue gas purification systems are made up of dust removal, desulfurization, and denitrification devices, which complicate the structure of the flue gas treatment system and have high operating and maintenance costs. − With the continuous development and improvement of desulfurization and denitrification technologies, the trend of desulfurization and denitrification integration has gradually formed. In this way, the cost of operation and maintenance of the purification equipment is reduced, the equipment floor space is reduced, and the utilization rate of resources is improved. − …”

Section: Introductionmentioning

confidence: 99%

Simultaneous Desulfurization and Denitrification Using La–Ce–V–Cu–ZSM-5 Catalysts in an Electrostatic Precipitator

Zhao

Wei-heng

et al. 2020

ACS Omega

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Different catalysts were loaded onto the collecting plate of an electrostatic precipitator to achieve the simultaneous removal of multiple pollutants from coal-fired gas. The synergistic desulfurization and denitrification effect of the catalyst and the effect of corona discharge on the activity of the catalyst were studied. The La(6%)–Ce(8%)–V(7%)–Cu(8%)–ZSM-5 catalyst prepared by successive impregnation methods had the optimum simultaneous desulfurization and denitrification efficiency at a roasting temperature of 600 °C. The desulfurization and denitrification rates reached 97.09 and 83.30%, respectively. BET and SEM characterization results showed that the loading of active components and additives improved the pore structure of the molecular sieve, which contributed to the high stability of the catalyst’s internal structure and large surface area, as well as better desulfurization and denitrification efficiency. Corona discharge can significantly improve the catalytic effect.

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“…NO x and SO 2 emitted into the atmosphere may be converted to nitric acid and sulfuric acid, which together with dust and organic matter can lead to haze . Moreover, NO x and SO 2 are also the precursors of photochemical smog. , Hence, the emission control of NO x and SO 2 has received the attention of both government and society. Selective catalytic reduction can remove NO x from coal-fired flue gas via ammonia injection under oxygen-enriched conditions, and SO 2 can be removed by wet flue gas desulfurization (WFGD). , …”

Section: Introductionmentioning

confidence: 99%

Simultaneous Removal of NO and SO₂ via an Integrated System of Nonthermal Plasma Combined with Catalytic Oxidation and Wet Electrostatic Precipitator

et al. 2019

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An integrated system of dielectric barrier discharge (DBD) combined with MnCu/Ti catalyst and wet electrostatic precipitator (DBD–catalyst–WESP) was constructed for simultaneous removal of SO2 and NO. The removal mechanism and the effects of special energy density (SED) and initial concentrations of NO and SO2 on oxidation efficiency were investigated. Experimental results showed that compared with Mn/Ti and Cu/Ti, the MnCu/Ti catalyst exhibited a higher dispersion of active constituents and has more catalytic oxidation active substances. The removal efficiencies of NO and SO2 in the DBD-catalyst system increased with increasing SED (15–275 J/L), and the lower the initial concentration was, the higher were the simultaneous removal efficiencies of NO and SO2. The competitive relationship between the removal of NO and SO2 was clarified. Compared with the DBD–catalyst system, the DBD–catalyst–WESP system significantly improved the simultaneous removal efficiencies of NO and SO2. With low initial concentrations (200 mg/m3 NO and 1000 mg/m3 SO2), the simultaneous removal efficiencies in DBD–catalyst–WESP reached the highest values (93.4% for NO and 100% for SO2) at SED = 275 J/L. According to ion chromatography measurements, the DBD–catalyst oxidation products were NO2 and SO3. Most of the oxidation products were captured and converted into nitrate ions and sulfate ions in WESP.

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Influence of NO2 and SO2 on the specific resistance of dust in flue gas

Cited by 9 publications

References 16 publications

Regeneration of Selective Catalyst Reduction Catalysts Deactivated by Pb, As, and Alkali Metals

Regeneration of Selective Catalyst Reduction Catalysts Deactivated by Pb, As, and Alkali Metals

Simultaneous Desulfurization and Denitrification Using La–Ce–V–Cu–ZSM-5 Catalysts in an Electrostatic Precipitator

Simultaneous Removal of NO and SO₂ via an Integrated System of Nonthermal Plasma Combined with Catalytic Oxidation and Wet Electrostatic Precipitator

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Influence of NO2 and SO2 on the specific resistance of dust in flue gas

Cited by 9 publications

References 16 publications

Regeneration of Selective Catalyst Reduction Catalysts Deactivated by Pb, As, and Alkali Metals

Regeneration of Selective Catalyst Reduction Catalysts Deactivated by Pb, As, and Alkali Metals

Simultaneous Desulfurization and Denitrification Using La–Ce–V–Cu–ZSM-5 Catalysts in an Electrostatic Precipitator

Simultaneous Removal of NO and SO2 via an Integrated System of Nonthermal Plasma Combined with Catalytic Oxidation and Wet Electrostatic Precipitator

Contact Info

Product

Resources

About

Simultaneous Removal of NO and SO₂ via an Integrated System of Nonthermal Plasma Combined with Catalytic Oxidation and Wet Electrostatic Precipitator