An experimental and modeling study of the enhancement of H2O2 on the activity of SNCR

Wang, Fumei; Zhang, Rujie; Zeng, Yajun; Jia, Yujie; Shen, Boxiong; Yang, Jiancheng; Liu, Qinglong

doi:10.1016/j.fuel.2022.124215

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…At lower temperatures, the reaction rate and efficiency of the redox reaction decrease, while at higher temperatures, NH 3 as a reducing agent may react with oxygen to produce toxic NO gas. Introducing additives such as CO and propane can broaden the temperature window for SNCR reactions, but this may compromise the optimal reduction efficiency of N 2 O and increase investment costs . In deN 2 O technology, N 2 O undergoes direct decomposition into N 2 and O 2 without the use of a reductant.…”

Section: Introductionmentioning

confidence: 99%

“…Introducing additives such as CO and propane can broaden the temperature window for SNCR reactions, but this may compromise the optimal reduction efficiency of N 2 O and increase investment costs. 13 In deN 2 O technology, N 2 O undergoes direct decomposition into N 2 and O 2 without the use of a reductant. However, this process requires the participation of catalysts, which were primarily categorized into three groups: noble metal, ion-exchanged molecular sieve, and metal oxide.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the Micropore Functional Mechanism of N₂O Adsorption by the Eucalyptus Bark-based Porous Carbon

Mou,

Liu,

Gong

et al. 2024

Langmuir

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Nitrous oxide (N 2 O), recognized as a significant greenhouse gas, has received insufficient research attention in the past. In view of their low energy consumption and cost-effectiveness, the application of porous materials in adsorption is increasingly regarded as a potent strategy to reduce N 2 O pollution. In this study, a series of microporous porous carbons with a preeminent specific surface area (244.54−2018.08 m 2 g −1 ), which are derived from the fast-growing eucalyptus bark, were synthesized by KOH activation at high temperatures. The obtained materials demonstrated a relatively fine N 2 O capture capability (0.19− 0.68 mmol g −1 ) at normal temperature and pressure. More importantly, the optimal pore size affecting N 2 O adsorption (0.8 and 1.0 nm) has been detected, which is a meaningful view that has never been put forward in previous studies. The rationality of the N 2 O adsorption mechanism was also validated by combining the experimental analysis and Grand Canonical Monte Carlo (GCMC) simulation. The calculated results showed that 0.8 and 1.0 nm of the porous carbon were the preferred pore sizes for N 2 O adsorption, and the interaction force between N 2 O and the pore wall decreased with the increase of distance. This study provides a significant theoretical basis for the preparation of biomass porous carbon with excellent N 2 O adsorption performance and practical adsorption application.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring the Micropore Functional Mechanism of N₂O Adsorption by the Eucalyptus Bark-based Porous Carbon

Mou,

Liu,

Gong

et al. 2024

Langmuir

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“…3,4 ), liquid (H 2 O 2 , carbonates, alcohols, etc. 5,6 ), and solid (coal powder) additives, as well as surfactants, 7 to widen the temperature window and improve the utilization of reducing agents. However, the additional use of such additives incurs higher costs, thus limiting their application in flue gas denitrification in cement kilns.…”

Section: Introductionmentioning

confidence: 99%

“…Current research on SNCR denitration technology mainly focuses on optimizing operation and atmosphere conditions to improve denitration efficiency. This includes the use of gaseous (CO, CH 4 , C 3 H 8 , etc. , ), liquid (H 2 O 2 , carbonates, alcohols, etc. , ), and solid (coal powder) additives, as well as surfactants, to widen the temperature window and improve the utilization of reducing agents. However, the additional use of such additives incurs higher costs, thus limiting their application in flue gas denitrification in cement kilns.…”

Section: Introductionmentioning

confidence: 99%

Modification to Enhance Surface Acidity and Reactive Species of Coal Fly Ash: A Study of Efficient NO_X Removal

Meng,

Cui,

Wang

et al. 2024

ACS Sustainable Chem. Eng.

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Effect of liquid additives on the low temperature denitration activity of SNCR and emission characteristics of N₂O and CO

Ding,

Liu,

Wan

et al. 2024

Asia-Pacific J Chem Eng

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The problem of nitrogen oxide (NOx) emissions has attracted wide attention in the field of environmental protection. The effects of sodium hydroxide (NaOH), hydrogen peroxide (H2O2), phenol (C6H5OH) and ethanol (C2H6OH) on the denitration activity of selective non‐catalytic reduction (SNCR) and the emission of secondary pollutants nitrous oxide (N2O) and carbon monoxide (CO) were investigated. Results indicated that the addition of NaOH, phenol and ethanol can improve the denitration efficiency under low temperature by providing OH. From 650°C to 750°C, ethanol had the best effect, with the denitration efficiency of 30%. From 750°C to 850°C, the denitration efficiency of phenol was 40% ~ 50%. The introduction of phenol and ethanol would increase the N2O and CO emissions. From 700°C to 800°C, hydrogen peroxide only caused a small amount of N2O emissions and had no significant effect on CO.

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An experimental and modeling study of the enhancement of H2O2 on the activity of SNCR

Cited by 10 publications

References 23 publications

Exploring the Micropore Functional Mechanism of N₂O Adsorption by the Eucalyptus Bark-based Porous Carbon

Exploring the Micropore Functional Mechanism of N₂O Adsorption by the Eucalyptus Bark-based Porous Carbon

Modification to Enhance Surface Acidity and Reactive Species of Coal Fly Ash: A Study of Efficient NO_X Removal

Effect of liquid additives on the low temperature denitration activity of SNCR and emission characteristics of N₂O and CO

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An experimental and modeling study of the enhancement of H2O2 on the activity of SNCR

Cited by 10 publications

References 23 publications

Exploring the Micropore Functional Mechanism of N2O Adsorption by the Eucalyptus Bark-based Porous Carbon

Exploring the Micropore Functional Mechanism of N2O Adsorption by the Eucalyptus Bark-based Porous Carbon

Modification to Enhance Surface Acidity and Reactive Species of Coal Fly Ash: A Study of Efficient NOX Removal

Effect of liquid additives on the low temperature denitration activity of SNCR and emission characteristics of N2O and CO

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Exploring the Micropore Functional Mechanism of N₂O Adsorption by the Eucalyptus Bark-based Porous Carbon

Exploring the Micropore Functional Mechanism of N₂O Adsorption by the Eucalyptus Bark-based Porous Carbon

Modification to Enhance Surface Acidity and Reactive Species of Coal Fly Ash: A Study of Efficient NO_X Removal

Effect of liquid additives on the low temperature denitration activity of SNCR and emission characteristics of N₂O and CO