NO Removal from Flue Gas by Using Chlorine Dioxide Solution

Sun, Shujun; Ma, Suxia; Yang, Bingchuan; Cui, Rongji; Wang, Jie

doi:10.1021/acs.energyfuels.9b01694

Cited by 14 publications

(8 citation statements)

References 31 publications

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“…NO (l) ↔ NO (g) (13) Figure 7b illustrated the effects of co-existing SO 2 on NO oxidation and NO x removal performance during the reaction process. At the beginning, initial NO and SO 2 concentrations in inlet flue gas were adjusted to about 200 and 220 ppm, respectively.…”

Section: No Oxidation and So 2 Removal By In-situ Ozone Oxidation And...mentioning

confidence: 99%

“…A feasible way to improve NO x removal efficiency is to introduce some other oxidative additives into the scrubbing solution. Some common oxidants, such as NaClO [9], NaClO 2 [10], H 2 O 2 [11], Na 2 S 2 O 8 [12], ClO 2 [13], and O 3 [14], have been investigated to oxidize NO into higher valance NO x . Since the solubilities of higher valance NO x are much higher than that of NO, a high NO x removal efficiency has been obtained in the previous research.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Method for Simultaneous Removal of NO and SO2 from Marine Exhaust Gas via In-Site Combination of Ozone Oxidation and Wet Scrubbing Absorption

Han

Zou

Wang

et al. 2020

JMSE

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The stringent international regulations on marine emission abatement have exerted a huge push on the development of marine desulfurization and denitrification technologies. However, for the traditional vessels driven by large two-stroke diesel engines, simultaneous removal of NOx and SO2 is still a big challenge at present. Here, a one-stage ozone oxidation combined with in-situ wet scrubbing for simultaneous removal of NO and SO2 is proposed. A series of experiments were performed based on a bench-scale reaction system. The results showed that in-situ wet scrubbing could effectively decrease flue gas temperature, and then suppress the thermal decomposition of ozone, which was beneficial for improve oxidant utilization. Meanwhile, the in-situ combination of ozone injection and wet scrubbing was in favor of improving the selectivity oxidation of NO over SO2 by ozone, which was possibly due to the high aqueous solubility of SO2 in water. Aiming to reduce the electric power consumption by an ozone generating system, O3/NO molar ratio was kept as low as possible. A complete removal of SO2 and a high NOx removal efficiency could be achieved through the introduction of other oxidative additives in scrubbing solution. This integrated system designed for marine application was of great significance.

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Section: No Oxidation and So 2 Removal By In-situ Ozone Oxidation And...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Method for Simultaneous Removal of NO and SO2 from Marine Exhaust Gas via In-Site Combination of Ozone Oxidation and Wet Scrubbing Absorption

Han

Zou

Wang

et al. 2020

JMSE

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“…In the past few decades, many gaseous pollutants control technologies have been developed. In these technologies, wet flue gas desulfurization (WFGD) and selective catalytic reduction (SCR) denitration are the two most widely used SO 2 and NO x removal technologies. − Activated carbon adsorption is the main removal technology of heavy metals, Hg and As, from gas stream. − Alcohol amine absorption and catalytic oxidation are the most widely used treatment technologies of gaseous H 2 S. − The mainstream removal technologies of VOCs are rich due to huge types of VOCs and their different characteristics. Adsorption, absorption, condensation, and catalytic combustion are the common VOCs removal technologies. − Supporting Information (SI) Figure S1 shows the classification of these gaseous pollutants common removal technologies.…”

Section: Introductionmentioning

confidence: 99%

A Critical Review on Removal of Gaseous Pollutants Using Sulfate Radical-based Advanced Oxidation Technologies

Liu

Wang

2021

Environ. Sci. Technol.

114

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Excessive emissions of gaseous pollutants such as SO2, NO x , heavy metals (Hg, As, etc.), H2S, VOCs, etc. have triggered a series of environmental pollution incidents. Sulfate radical (SO4•–)-based advanced oxidation technologies (AOTs) are one of the most promising gaseous pollutants removal technologies because they can not only produce active free radicals with strong oxidation ability to simultaneously degrade most of gaseous pollutants, but also their reaction processes are environmentally friendly. However, so far, the special review focusing on gaseous pollutants removal using SO4•–-based AOTs is not reported. This review reports the latest advances in removal of gaseous pollutants (e.g., SO2, NO x , Hg, As, H2S, and VOCs) using SO4•–-based AOTs. The performance, mechanism, active species identification and advantages/disadvantages of these removal technologies using SO4•–-based AOTs are reviewed. The existing challenges and further research suggestions are also commented. Results show that SO4•–-based AOTs possess good development potential in gaseous pollutant control field due to simple reagent transportation and storage, low product post-treatment requirements and strong degradation ability of refractory pollutants. Each SO4•–-based AOT possesses its own advantages and disadvantages in terms of removal performance, cost, reliability, and product post-treatment. Low free radical yield, poor removal capacity, unclear removal mechanism/contribution of active species, unreliable technology and high cost are still the main problems in this field. The combined use of multiactivation technologies is one of the promising strategies to overcome these defects since it may make up for the shortcomings of independent technology. In order to improve free radical yield and pollutant removal capacity, enhancement of mass transfer and optimization design of reactor are critical issues. Comprehensive consideration of catalytic materials, removal chemistry, mass transfer and reactor is the promising route to solve these problems. In order to clarify removal mechanism, it is essential to select suitable free radical sacrificial agents, probes and spin trapping agents, which possess high selectivity for target specie, high solubility in water, and little effect on activity of catalyst itself and mass transfer/diffusion parameters. In order to further reduce investment and operating costs, it is necessary to carry out the related studies on simultaneous removal of more gaseous pollutants.

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“…With the booming economic development, enormous volumes of NO x was emitted into the atmosphere, which has aroused serious environmental issues, for instance, acid rain, photochemical smog, and ozone depletion. − Owing to the negative impact of NO x , reducing NO x emissions is extraordinarily critical to environmental protection. There exists a host of technologies for the NO x abatement, in which advanced oxidation processes, such as nonthermal plasma, chlorine, persulfate, ozone, and Fenton-based methods, , might be a technology with tremendous potential. Unfortunately, the service life and the stability of the system restrain the application of advanced oxidation processes .…”

Section: Introductionmentioning

confidence: 99%

Cerium Oxide-Based Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃: A Review

et al. 2021

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The selective catalytic reduction (SCR) of NO x with ammonia is an effective method to remove NO x from stationary and mobile sources. Cerium oxides (CeO x ) have been studied extensively as low-temperature SCR catalysts since they manifest prominent oxygen storage capacity in catalysis. This paper reviews the recent progress on the Ce-based catalysts for low-temperature SCR de-NO x with NH 3 , including three categories, single CeO x , Ce-based multimetal oxide, and Ce-based multimetal oxides with support. In the section on single CeO x , the reasons for the significant catalytic activity and the function of CeO x in the catalytic reactions are systematically reviewed. For multimetal oxide catalysts, the various roles played by the components of catalysts are summarized from several aspects. In the introduction of supported metal oxide catalysts, according to the type of support, the function of each support in the reaction is analyzed methodically. Additionally, we investigated the reaction mechanism of lowtemperature SCR of NO x , including Eley−Rideal (E−R) and Langmuir−Hinshelwood (L−H) mechanisms. Finally, the development outlook and direction of the application of cerium oxide-based catalysts in the field of low-temperature SCR of NO x is prospected.

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NO Removal from Flue Gas by Using Chlorine Dioxide Solution

Cited by 14 publications

References 31 publications

A Novel Method for Simultaneous Removal of NO and SO2 from Marine Exhaust Gas via In-Site Combination of Ozone Oxidation and Wet Scrubbing Absorption

A Novel Method for Simultaneous Removal of NO and SO2 from Marine Exhaust Gas via In-Site Combination of Ozone Oxidation and Wet Scrubbing Absorption

A Critical Review on Removal of Gaseous Pollutants Using Sulfate Radical-based Advanced Oxidation Technologies

Cerium Oxide-Based Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃: A Review

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NO Removal from Flue Gas by Using Chlorine Dioxide Solution

Cited by 14 publications

References 31 publications

A Novel Method for Simultaneous Removal of NO and SO2 from Marine Exhaust Gas via In-Site Combination of Ozone Oxidation and Wet Scrubbing Absorption

A Novel Method for Simultaneous Removal of NO and SO2 from Marine Exhaust Gas via In-Site Combination of Ozone Oxidation and Wet Scrubbing Absorption

A Critical Review on Removal of Gaseous Pollutants Using Sulfate Radical-based Advanced Oxidation Technologies

Cerium Oxide-Based Catalysts for Low-Temperature Selective Catalytic Reduction of NOx with NH3: A Review

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Product

Resources

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Cerium Oxide-Based Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃: A Review