Historic and futuristic review of electron beam technology for the treatment of SO2 and NOx in flue gas

Park, Jun Hyeong; Ahn, Ji Won; Kim, Ki‐Hyun; Son, Youn Suk

doi:10.1016/j.cej.2018.08.103

Cited by 132 publications

(38 citation statements)

References 76 publications

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“…In addition, NOx causes the eutrophication of lakes, which brings to extinction of aquatic life [7]. Scientists and engineers all over the world have been challenged by this fact, devising ways of developing a more efficient deNOx technique, aimed at mitigating the effect of strict NOx emission [8, 9].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen oxide reduction through absorbent solutions containing nitric acid and hydrogen peroxide in hollow fiber membrane modules

Kartohardjono

Merry

Rizky

et al. 2019

Heliyon

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Emissions of nitrogen oxides such as NO and NO2, which are commonly known as NOx, are threats to human existence and cause environmental problems. Mainly, two techniques have been developed to drastically reduce these emissions, which are dry and wet processes. The wet process has several advantages, major identifiable advantages are the adaptability to the flue gas, low operating temperatures and no poisoning and inactivation catalyst. Also, a mixture of hydrogen peroxide and nitric acid are used as absorbents solution for NOx reduction in the wet process. The advantages of using this mixture include the ability to reduce the negative effect of NOx and does not contaminate the scrubbing solution. In addition, nitric acid has an economical advantage in the process considering the fact that it is produced in the process. Finally, it can be conducted at ambient temperature. This study furthermore used a mixture of hydrogen peroxide and nitric acid solutions as an absorbent to reduce NOx in hollow fiber membrane modules. The hydrogen peroxide oxidized HNO2 to nitric acid, while enhances the oxidation through an autocatalytic reaction. The effects of the feed gas flow rate, hydrogen peroxide concentrations and number of fibers on the NOx reduction, absorbed NOx and flux were varied to study. The experimental results showed that the increase in the feed gas flow rate from 100 to 200 mL/min decreased NOx reduction from about 98 to 94% but increased the absorbed NOx and flux from about 0.13 to 0.255 mmol/h and 0.85–1.63 mmol/m2.h, respectively The increase in proportion of NOx in the feed gas effect was dominant than the increase in absorbed NOx. An increase in hydrogen peroxide concentration from 0.5 to 10 wt.% in the absorbent solutions increased NOx reduction, absorbed NOx and flux from about 94 to 98%, 0.257–0.267 mmol/h and 1.09–1.13 mmol/m2.h, respectively. Additionally, the H2O2 plays an important role in enhancing HNO2 oxidation to HNO3. Furthermore, an increase in the number of fibers from 50 to 150 in the membrane module increased NOx reduction and absorbed NOx from 86 to 97% and 0.23–0.27 mmol/h. Flux decreased from 2.98 to 1.13 mmol/m2.h due to increment in the gas-liquid contact surface area.

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Section: Introductionmentioning

confidence: 99%

Nitrogen oxide reduction through absorbent solutions containing nitric acid and hydrogen peroxide in hollow fiber membrane modules

Kartohardjono

Merry

Rizky

et al. 2019

Heliyon

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“…As the most prevalent form of NO x , NO 2 contributes to the formation of photochemical smog, the destruction of stratospheric ozone and the rise of global warming 3 . The development of NO 2 abatement technologies is therefore important, and selective catalytic reduction (SCR) with NH 3 at elevated temperatures (up to 600 o C) represents the most mature technology in operation [5][6][7] . However, SCR relies critically on the use of toxic chemicals and often precious metal catalysts, and moreover is incapable of complete NO x elimination.…”

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confidence: 99%

“…Emissions of NO x from post-SCR exhaust gas can be as high as 1000-2000 ppm, 5,000-10,000 times those emission limits set by World Health Organisation (WHO) 8 , thus posing significant health risks 4 . Rapid deactivation of SCR catalysts in the presence of trace SO 2 , water, alkali and heavy metals place further restrictions on their long-term applications 6,9 . Complete removal of trace NO 2 from exhaust gas requires the capture system to possess not only long-term stability against highly corrosive and reactive NO 2 , but also high selectivity over N 2 , CO 2 and SO 2 .…”

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confidence: 99%

Capture of nitrogen dioxide and conversion to nitric acid in a porous metal–organic framework

et al. 2019

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“…Therefore, the sulfur resistance of the SCR catalyst under low temperature conditions must be improved. 9 − 11 Third, most of the domestic research is currently focused on the low-temperature activity and sulfur resistance of granular catalysts, and the industrial application of catalysts must be shaped catalysts. 12 , 13 Molding preparation influences catalytic activity and sulfur resistance.…”

Section: Introductionmentioning

confidence: 99%

Study on Denitration Performance of Solid Waste Blast Furnace Slag Catalysts under Different Preparation Processes

et al. 2020

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In this article, blast furnace slag, a high-yield industrial solid waste, was taken as the research object and it was used as the main material. Bentonite was used as the binder, and water was added to shape the blast furnace slag into a small column. The denitration catalyst was prepared using different methods, its denitration performances were compared and analyzed, and the best preparation method and process parameters were screened. Results showed that bentonite will clearly improve denitration performance, and 4:1 blast furnace slag and bentonite was selected as the molding ratio to reduce the effect of bentonite on its performance, combined with the hardness and surface adhesion of the prepared carrier. Separately, the catalysts were prepared using citric acid impregnation, hydrothermal decomposition, and mixing method, and active Mn was loaded. Among them, the hydrothermal decomposition method cannot completely decompose in a closed kettle, resulting in a lower denitration performance. The catalyst prepared using the mixing method is superior to that prepared using the impregnation method because the active component prepared by the former was more uniformly dispersed, and simple and easy to operate, which can meet the needs of the excess denitration catalysts of small enterprises.

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Historic and futuristic review of electron beam technology for the treatment of SO2 and NOx in flue gas

Cited by 132 publications

References 76 publications

Nitrogen oxide reduction through absorbent solutions containing nitric acid and hydrogen peroxide in hollow fiber membrane modules

Nitrogen oxide reduction through absorbent solutions containing nitric acid and hydrogen peroxide in hollow fiber membrane modules

Capture of nitrogen dioxide and conversion to nitric acid in a porous metal–organic framework

Study on Denitration Performance of Solid Waste Blast Furnace Slag Catalysts under Different Preparation Processes

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