Control of combustion-generated nitrogen oxides by selective non-catalytic reduction

Javed, M. Tayyeb; Irfan, Naseem; Gibbs, B.M.

doi:10.1016/j.jenvman.2006.03.006

Cited by 271 publications

(51 citation statements)

References 125 publications

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“…SNCR technology does not involve any catalyst and its installation is easy . It can be utilised together with other NO x emission removal technologies, including SCR.…”

Section: Chemistry Of Nh3‐scrmentioning

confidence: 99%

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x

2018

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It is important and necessary to minimize NOx pollutant released into the atmosphere owing to the harmful environmental and health effects brought by NOx emission. Many techniques are available to reduce NOx emission, among of them, Selective Catalytic Reduction (SCR) is considered as one of the most efficient techniques. Conventional SCR systems involve ammonia (NH3) or urea (CO(NH2)2) as a reducing reagent to reduce NOx to N2 and H2O at high temperatures 300–400 °C. Research on developing novel low‐temperature catalysts (LTC) for SCR of NOx still remains of interest. This work reviewed and compared conventional SCR catalysts with newly emerging Metal‐Organic‐Frame (MOFs) materials as potential alternatives for SCR catalysts.

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“…SNCR technology does not involve any catalyst and its installation is easy . It can be utilised together with other NO x emission removal technologies, including SCR.…”

Section: Chemistry Of Nh3‐scrmentioning

confidence: 99%

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x

2018

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“…Abatement measures for NO x control can be divided into pre-combustion and post-combustion technologies, and most power plants are equipped with LNBs (Low-NOx Burners) that are designed to control the fuel and air mixing ratio to achieve reductions in NO x generation [74,75]. According to the Environmental Protection Agency (1999), general NO x reduction percentages for LNBs range from 20% to 60%, but now new units with LNBs can reach 100% during electricity generation.…”

Section: Reductions In Air Pollutionmentioning

confidence: 99%

Analysis of Co-Effects on Air Pollutants and CO2 Emissions Generated by End-of-Pipe Measures of Pollution Control in China’s Coal-Fired Power Plants

Zhao

Dong

et al. 2017

Sustainability

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Abstract:China is now facing great challenges resulting from climate change and air pollution, driven by the processes of industrialization and urbanization. Greenhouse gas and air pollutant emissions produced by the coal-fired power industry represent approximately 70% of the total emissions in China's industrial sector. In this study, 39 coal-fired power plants built in China between 2014 and 2015 were analyzed in regards to the co-effects oncarbon dioxide and air pollutant emissions generated directly and indirectly by end-of-pipe measures of pollution control. After completing the quantitative analysis with input data from 83units of power plants, we found that co-effects were positive only for air pollutant reductions through the implementation of desulfurization, denitrification, and dedusting measures, but co-effects were negative for carbon dioxide production because of the corresponding electricity use and chemical reactions that led to the increases in carbon dioxide emissions. We also performed an assessment of the synergistic coefficients to better understand the degree of co-effects. It will be important for researchers to take a comprehensive view of China's coal-fired power plants and look for solutions that can maximize positive co-effects and achieve overall co-benefits of reductions in greenhouse gas emissions and air pollutants.

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“…• C. [17] Both ends of the outer quartz tube were sealed by silica gel plugs which could be easily removed. The Schematic diagram of experimental apparatus.…”

Section: Experimental Apparatusmentioning

confidence: 99%

Effect of CaO on NH₃ + NO + O₂ reaction system in the absence and presence of high concentration CO₂

Zhuo

Chen

et al. 2009

Asia-Pacific J Chem Eng

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The effect of CaO on the NH 3 + NO + O 2 reaction system at 650-850• C was investigated. High CO 2 concentration was added to investigate the effect of CaCO 3 on this reaction system also. Experimental results showed that CaO had a strong catalytic effect on NH 3 decomposition, NH 3 oxidation by O 2 to NO, and NO reduction by NH 3 in the absence of O 2 . The overall effect of CaO on the NO + NH 3 + O 2 reaction was to enhance NH 3 oxidation by O 2 to produce more NO. A small amount of NO 2 and no N 2 O was detected in the outlet gas stream over CaO in the NH 3 + NO + O 2 reaction. NO 2 formation decreased with temperature increase. NO 2 formation in the NH 3 + NO + O 2 reaction over CaO was attributed to the oxidization of NH 3 and NO by O 2 . The performance of CaCO 3 was different from CaO. NH 3 decomposition was promoted, but NH 3 oxidation to NO was inhibited after CaO was converted to CaCO 3 . No catalytic activity for NO reduction was detected in NO + NH 3 reaction over CaCO 3 , but strong activity for NH 3 decomposition was observed. NO and NH 3 outlet concentration over CaCO 3 in the NH 3 + NO + O 2 reaction was lower and higher, respectively, than that of CaO, which was mainly due to the difference of CaO and CaCO 3 for NH 3 oxidation. NO 2 formation was inhibited, but N 2 O was observed over CaCO 3 . N 2 O formation increased with temperature increase at 650-750• C, and then decreased at 750-850

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Control of combustion-generated nitrogen oxides by selective non-catalytic reduction

Cited by 271 publications

References 125 publications

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x

Analysis of Co-Effects on Air Pollutants and CO2 Emissions Generated by End-of-Pipe Measures of Pollution Control in China’s Coal-Fired Power Plants

Effect of CaO on NH₃ + NO + O₂ reaction system in the absence and presence of high concentration CO₂

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Control of combustion-generated nitrogen oxides by selective non-catalytic reduction

Cited by 271 publications

References 125 publications

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NOx

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NOx

Analysis of Co-Effects on Air Pollutants and CO2 Emissions Generated by End-of-Pipe Measures of Pollution Control in China’s Coal-Fired Power Plants

Effect of CaO on NH3 + NO + O2 reaction system in the absence and presence of high concentration CO2

Contact Info

Product

Resources

About

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x

Effect of CaO on NH₃ + NO + O₂ reaction system in the absence and presence of high concentration CO₂