Integrated method of non-thermal plasma combined with catalytical oxidation for simultaneous removal of SO2 and NO

Cui, Shaoping; Hao, Runlong; Fu, Dong

doi:10.1016/j.fuel.2019.03.012

Cited by 53 publications

(40 citation statements)

References 70 publications

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“…Thus, when the adsorption is studied in the presence of 440 ppm of NO and 14 ppm of NO 2 , in the initial stages, both NO x and SO 2 can adsorb on the free alumina sites; however, with the reduction of the number of free adsorption sites, a competition takes place ad SO 2 (having higher affinity with the alumina) displaces the NO x molecules. For the hybrid system using the NTP as source of radiation, the oxidation efficiency for SO 2 shown a maximum (corresponding to a 20% of conversion) with discharge power variation in the interval 5.5-7.5 W. Conversely, the oxidation efficiency of NO is enhanced (50%), due to the higher reaction rates of the nitrogen monoxide [49]. Anyway, the interactions between the radicals formed upon NTP irradiation and alumina assured the generation of adsorbed oxygen atoms on the surface, which enhanced SO 2 adsorption and sulfate formation.…”

Section: Catalytic So 2 Removal Via Ntp Technologymentioning

confidence: 99%

“…They [ 49 ] also found that, in the presence of NO, SO 2 and NO compete with each other in the removal mechanism; thus, SO 2 removal efficiency in the presence of the MnCu/TiO 2 catalyst can be enhanced by reducing the initial concentration of nitrogen monoxide. In fact, the radicals involved in the removal (·O and O 3 ) are the same and the reaction rates of SO 2 with such radicals (3.52 × 10 −14 , 1.89 × 10 −22 cm 3 molecule −1 s −1 , respectively) are lessened compared to the values reported for NO (3.0 × 10 −11 cm 3 molecule −1 s −1 and 1.8 × 10 −14 cm 3 molecule −1 s −1 , respectively) Thus, for a SED of 240 J L −1 , SO 2 removal efficiency grew from 70% to 90% by lowering NO concentration from 400 to 200 mg m −3 .…”

Section: Catalytic So 2 Removal Via Ntp Technolmentioning

confidence: 99%

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A Review about the Recent Advances in Selected NonThermal Plasma Assisted Solid–Gas Phase Chemical Processes

et al. 2020

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Plasma science has attracted the interest of researchers in various disciplines since the 1990s. This continuously evolving field has spawned investigations into several applications, including industrial sterilization, pollution control, polymer science, food safety and biomedicine. nonthermal plasma (NTP) can promote the occurrence of chemical reactions in a lower operating temperature range, condition in which, in a conventional process, a catalyst is generally not active. The aim, when using NTP, is to selectively transfer electrical energy to the electrons, generating free radicals through collisions and promoting the desired chemical changes without spending energy in heating the system. Therefore, NTP can be used in various fields, such as NOx removal from exhaust gases, soot removal from diesel engine exhaust, volatile organic compound (VOC) decomposition, industrial applications, such as ammonia production or methanation reaction (Sabatier reaction). The combination of NTP technology with catalysts is a promising option to improve selectivity and efficiency in some chemical processes. In this review, recent advances in selected nonthermal plasma assisted solid–gas processes are introduced, and the attention was mainly focused on the use of the dielectric barrier discharge (DBD) reactors.

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Section: Catalytic So 2 Removal Via Ntp Technologymentioning

confidence: 99%

Section: Catalytic So 2 Removal Via Ntp Technolmentioning

confidence: 99%

A Review about the Recent Advances in Selected NonThermal Plasma Assisted Solid–Gas Phase Chemical Processes

et al. 2020

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“…An et al [247] studied the oxidation characteristics of NO in oxygen atmosphere by surface dielectric barrier discharge plasma treatment of mixed flue gas with active material injection method. Cui et al [248] prepared a MnCe/Ti catalyst in a dielectric barrier discharge reactor by combining nonthermal plasma discharge with catalyst. The highest NO conversion rate was 86.9%.…”

Section: Plasma-modified Catalystmentioning

confidence: 99%

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Liu

et al. 2019

Catalysts

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Nitrogen oxides (NO x ) represent one of the main sources of haze and pollution of the atmosphere as well as the causes of photochemical smog and acid rain. Furthermore, it poses a serious threat to human health. With the increasing emission of NO x , it is urgent to control NO x . According to the different mechanisms of NO x removal methods, this paper elaborated on the adsorption method represented by activated carbon adsorption, analyzed the oxidation method represented by Fenton oxidation, discussed the reduction method represented by selective catalytic reduction, and summarized the plasma method represented by plasma-modified catalyst to remove NO x . At the same time, the current research status and existing problems of different NO x removal technologies were revealed and the future development prospects were forecasted.Catalysts 2019, 9, 771 2 of 39 adsorption, oxidation, reduction, and plasma methods. In view of these attentive findings, adsorption method uses recyclable solid adsorbent material to adsorb NO x from flue gas through microporous structure, remarkably, environmentally friendly, no secondary pollution, and energy-saving and -efficient features make it stand out [18][19][20]. The oxidation process is a method that oxidizes NO into NO 2 or N 2 O 3 with high solubility under the action of an oxidant that is then absorbed by water or alkali solution. The process is simple and cost-saving, and is widely used in the wet flue gas denitrification process with relatively low cost and high removal efficiency of NO x ; except that the oxidized NO and SO 2 can be removed simultaneously to produce high value-added products [21][22][23]. The reduction method has the characteristics of high efficiency, cleanliness, and mildness; NO x removal can be realized at low temperature at present [24][25][26]. The plasma method is used to modify the surface of the catalyst, the dispersion of active species can be improved by plasma treatment, and the stability and low temperature activity of catalyst can be improved [27,28].Seldom, if ever, does a comprehensive article to introduce the current situation and treatment methods of removing NO x . In this paper, we tried to renovate, classify, and summarize the significant perspectives and most relevant findings reported in recent research articles and earlier reviews generalizing the mechanism analysis and research progress of NO x removal by adsorption, oxidation, reduction, and plasma methods, which can provide means for promoting the technological progress of pollution prevention, maintaining healthy development of factories continuously, studying the methods of removing NO x deeply, and mastering different technologies of removing NO x , as well as providing guidance for controlling the emission of NO x from motor vehicles such as diesel, gasoline, and so on. In order to improve the environmental quality and save the ecological environment, this paper further provides a convenient, low-cost, efficient, and economic guidance line.

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“…13,14 Dry simultaneous control technologies are promisingly investigated without large water assumptions and low secondary pollution. [15][16][17][18][19][20][21][22][23][24][25][26][27] Among the dry integrated multi-pollutant removal technologies, the carbon-based catalyst-integrated removal technology was widely studied, 28,29 particularly in the sintering ue gas industry. 30 Activated coke/activated carbon is used as a dry adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Scale-up experiments of SO₂ removal and the promoting behavior of NO in moving beds at medium temperatures

Bie

Gong

et al. 2021

RSC Adv.

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Integrated method of non-thermal plasma combined with catalytical oxidation for simultaneous removal of SO2 and NO

Cited by 53 publications

References 70 publications

A Review about the Recent Advances in Selected NonThermal Plasma Assisted Solid–Gas Phase Chemical Processes

A Review about the Recent Advances in Selected NonThermal Plasma Assisted Solid–Gas Phase Chemical Processes

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Scale-up experiments of SO₂ removal and the promoting behavior of NO in moving beds at medium temperatures

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Integrated method of non-thermal plasma combined with catalytical oxidation for simultaneous removal of SO2 and NO

Cited by 53 publications

References 70 publications

A Review about the Recent Advances in Selected NonThermal Plasma Assisted Solid–Gas Phase Chemical Processes

A Review about the Recent Advances in Selected NonThermal Plasma Assisted Solid–Gas Phase Chemical Processes

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Scale-up experiments of SO2 removal and the promoting behavior of NO in moving beds at medium temperatures

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Product

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Scale-up experiments of SO₂ removal and the promoting behavior of NO in moving beds at medium temperatures