Simultaneous removal of SO2 and NO2 using a Mg–Al oxide slurry treatment

Kameda, Tomohito; Kodama, Aki; Yoshioka, Toshiaki

doi:10.1016/j.chemosphere.2013.08.089

Cited by 9 publications

(3 citation statements)

References 17 publications

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“…Another catalyst such as Ce promoted V 2 O 5 and CuO/Al 2 O 3 are reported for oxidation of sulfur dioxide, which is carried out at high temperatures. In this study, catalytic oxidation is carried out using a new catalyst (Mn/ CS) without the use of expensive oxidizers and at ambient temperatures [34,35].…”

Section: Discussionmentioning

confidence: 99%

Catalytic oxidation of SO2 by novel Mn/copper slag nanocatalyst and optimization by Box-Behnken design

Rabiee

Mahanpoor

2018

Int J Ind Chem

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In this research, the oxidation of sulfur dioxide (SO 2) gases is investigated by Mn/copper slag nanocatalyst (Mn/CS) as a novel catalyst at low temperatures. The removal of SO 2 gas from industrial exhaust is important to reduce environmental pollution. The SO 2 gas in aqueous solution was oxidized and converted to sulfuric acid as an energy source by Mn/CS in the semi-batch reactor (SBR). The characterization of the catalyst was studied using X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), field emission scanning electron microscopy (FESEM), and Fourier transform infrared spectroscopy (FTIR), simultaneous thermal analysis (thermogravimetry/differential thermal analysis) STA (TG/DTA) techniques, X-ray fluorescence microscopy (XRF) and BET surface area. A Box-Behnken design (BBD) was used for the optimization of influencing factors such as the amount of nanocatalyst, the temperature and the reaction time in the oxidation of SO 2. The graphical counter plots and response surface were used to determine the optimum conditions. The results showed that the nanocatalyst had the most significant effect on SO 2 oxidation compared with the other two variables. Temperature = 283 K, Mn/CS amount = 6 g/L and Time = 60 min were determined as maximum efficiency for oxidation of SO 2 .

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Section: Discussionmentioning

confidence: 99%

Catalytic oxidation of SO2 by novel Mn/copper slag nanocatalyst and optimization by Box-Behnken design

Rabiee

Mahanpoor

2018

Int J Ind Chem

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“…13,14 In light of the difficulty in coupling discrete SO 2 and NO x removal approaches, developing an effective technology for simultaneous removal of SO 2 and NO x is a desired goal. Various technologies have been developed for simultaneous removal of SO 2 and NO x , such as solid-phase absorption, 15,16 nonthermal plasma, 17,18 enhanced wet scrubbing, 7,19,20 etc. WFGD can be used for the combined removal of NO x and SO 2 provided that the NO x is in a highly oxidized state with high water solubility.…”

Section: Introductionmentioning

confidence: 99%

Investigation of NO Removal with Ozone Deep Oxidation in Na₂CO₃ Solution

et al. 2019

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Wet flue gas desulfurization (WFGD) provides highly efficient SO 2 removal in industrial flue gas treatment. Although NO and NO 2 are not readily absorbed in the traditional desulfurization wash tower, deep oxidation with ozone can promote the formation of N 2 O 5 that is absorbed in the washing fluid, making possible simultaneous denitration and desulfurization in the WGFD unit. This paper presents a survey of operating parameters for NO x removal after ozone deep oxidation using a Na 2 CO 3 -based WFGD. The effects of preoxidation time, Na 2 CO 3 aqueous solution concentration, spray liquid/gas ratio, gas residence time in wash tower, and SO 2 concentration on NO x removal efficiency were investigated systematically in a variable-configuration experimental setup. The results demonstrate that preoxidation time was the most sensitive factor in N 2 O 5 formation, although oxidation continued in the wash tower. Thus, one strategy for a system where physical constraints limit the volume of the oxidation chamber is to extend the flue gas residence time in the wash tower. Increasing the liquid/gas ratio and Na 2 CO 3 solution concentration gave some enhancement on the wet absorption process. Under optimal laboratory conditions, 95% NO x removal efficiency was achieved. Addition of SO 2 yielded a slight inhibition for NO x removal, and under industrial relevant operating conditions, 98% SO 2 and 62% NO x removal was achieved during 50 min experimental runs.

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“…It possesses a good combination of features such as high melting point, low thermal conductivity, high strength at room and elevated temperatures and good corrosion resistance. This makes it popular in many industrial applications [1].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of MgAl2O4 micro-rods by a molten salt method

Zhang

et al. 2015

Ceramics International

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Simultaneous removal of SO2 and NO2 using a Mg–Al oxide slurry treatment

Cited by 9 publications

References 17 publications

Catalytic oxidation of SO2 by novel Mn/copper slag nanocatalyst and optimization by Box-Behnken design

Catalytic oxidation of SO2 by novel Mn/copper slag nanocatalyst and optimization by Box-Behnken design

Investigation of NO Removal with Ozone Deep Oxidation in Na₂CO₃ Solution

Synthesis and characterization of MgAl2O4 micro-rods by a molten salt method

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Simultaneous removal of SO2 and NO2 using a Mg–Al oxide slurry treatment

Cited by 9 publications

References 17 publications

Catalytic oxidation of SO2 by novel Mn/copper slag nanocatalyst and optimization by Box-Behnken design

Catalytic oxidation of SO2 by novel Mn/copper slag nanocatalyst and optimization by Box-Behnken design

Investigation of NO Removal with Ozone Deep Oxidation in Na2CO3 Solution

Synthesis and characterization of MgAl2O4 micro-rods by a molten salt method

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Investigation of NO Removal with Ozone Deep Oxidation in Na₂CO₃ Solution