Simultaneous removal of NO/sub x/, SO/sub x/, and CO/sub 2/ at elevated temperature using a plasma-chemical hybrid process

Yamamoto, Toshiaki; Okubo, Masaaki; Nagaoka, Toshihiko; Hayakawa, K.

doi:10.1109/tia.2002.802911

Cited by 46 publications

(23 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the principles of the plasma-chemical method [20], after NO contained within the flue gas is oxidized to NO 2 with O radicals induced by NTP according to reaction (1), the induced NO 2 is reduced to N 2 using a Na 2 SO 3 aqueous solution in the chemical reduction scrubber according to reaction (2). …”

Section: Small-scale Experiments For Plasma-chemical Hybrid Treatment mentioning

confidence: 99%

“…If smaller amounts of the chemicals were used, the NO 2 reduction performance would deteriorate because coexisting O 2 and CO 2 could consume them. Although Na 2 SO 3 chemical is a very inexpensive chemical [20], in future work it will be important to clarify the mechanism of the deterioration of NO 2 reduction by the coexisting O 2 and CO 2 in order to optimize the amount of chemicals used. The concentrations of the flue gas components are shown in Table 1 as follows: O 2 is 12.1-13.8%; H 2 O is 14-16%; CO 2 is 7-8%; HCl is 368-464 ppm; SO 2 is 6-29 ppm; CO is 14-24 ppm; NO is 140-173 ppm; and NO 2 is 0-15 ppm.…”

Section: Small-scale Experiments For Plasma-chemical Hybrid Treatment mentioning

confidence: 99%

“…In this method, plasma-induced NO 2 is reduced to N 2 using a wet-type chemical scrubber with a sodium sulfite (Na 2 SO 3 ) or sodium sulfide (Na 2 S) aqueous solution. These have been studied at a laboratory scale in experiments for simulated exhaust gas [16][17][18][19][20][21][22] and boiler emission [23]. However, this technology needs further analysis on reaction byproducts (especially they are harmful or not) when it is applied to a real exhaust gas including many components.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Pilot-Scale Experiment for Simultaneous Dioxin and NO x Removal from Garbage Incinerator Emissions Using the Pulse Corona Induced Plasma Chemical Process

Yoshida

Yamamoto

Kuroki

et al. 2009

Plasma Chem Plasma Process

View full text Add to dashboard Cite

A pilot-scale pulse corona induced plasma chemical process (PPCP) reactor for controlling gas-phase dioxins and NO x simultaneously is installed in a garbage incineration plant. The flow rate of the sampled flue gas is 5,000 Nm 3 /h (N: standard state) in maximum at the PPCP reactor, which consists of 22 wire-cylinder electrodes and is energized by a 50 kW nanosecond pulse high voltage generator. With an applied plasma energy density of 2.9-6.1 Wh/Nm 3 , the decomposition efficiency for dioxins is 75-84% based on TEQ (toxic equivalents); the conversion efficiency of NO to NO 2 is *93% at maximum. The flue gas treated by the PPCP reactor is introduced at a rate of 50 Nm 3 /h to a wet-type chemical reactor, which uses an aqueous solution of sodium sulfite (Na 2 SO 3 ). More than 90% of NO x is reduced to nitrogen, with negligible byproducts such as NO 2 -or NO 3 -ions left in the solution.

show abstract

Section: Small-scale Experiments For Plasma-chemical Hybrid Treatment mentioning

confidence: 99%

Section: Small-scale Experiments For Plasma-chemical Hybrid Treatment mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Pilot-Scale Experiment for Simultaneous Dioxin and NO x Removal from Garbage Incinerator Emissions Using the Pulse Corona Induced Plasma Chemical Process

Yoshida

Yamamoto

Kuroki

et al. 2009

Plasma Chem Plasma Process

View full text Add to dashboard Cite

show abstract

“…Electrostatic precipitators (ESP) have been developed for the removal of PM [5][6][7]. The reductions of PM, SOx and NOx using plasma and chemical technologies have been investigated [8,9].…”

Section: Introductionmentioning

confidence: 99%

The effects of gas cooling on removal of SOF and sulphate by electrostatic precipitator for marine diesel

Zukeran¹,

Sakuma²,

Yamagami³

et al. 2014

WIT Transactions on Ecology and the Environment

View full text Add to dashboard Cite

Particulate matters (PM), SOx and NOx in exhaust gases emitted from marine diesel engines may cause serious problems in human health and coastal environments. Therefore, their emissions have been regulated in MARPOL Treaty 73/78 Annex VI of IMO Air Pollution Control since 2005. In this paper, the reduction of PM for marine engines was investigated using an electrostatic precipitator (ESP) with a heat exchanger. Experiments were carried out to confirm the reduction of PM, which were Dry soot, Soluble Organic Fraction (SOF) and sulphate. The experimental system consisted of a diesel engine, a heat exchanger and an ESP. The exhaust gas at a temperature of 180°C was cooled to 20°C in the heat exchanger, whereby particles of SOF and sulfuric acid were generated due to condensation. These particles were collected in the ESP. The particle concentrations were measured using a low-volume air sampler, a soxhlet extractor and an ion chromatograph. As a result, the gaseous SOF was condensed to particulate matter due to gas cooling. This particulate matter was collected by ESP, whose removal efficiency exceeded 85%. The removal efficiency of sulphate was also improved.

show abstract

“…Chemical reactions in the plasmas are mainly initiated by the interaction of molecules with energetic electrons produced by various electrical discharges and the free radicals. To improve the energy efficiency and selectivity of non-thermal plasma applications, combination of non-thermal plasma and catalyst has been investigated recently [3,4]. Various materials including dielectrics, ferroelectrics and metals oxides are used as catalysts, which can improve the formation of active radicals and their distribution.…”

Section: Introductionmentioning

confidence: 99%

Generation of microdischarges in porous materials

et al. 2004

View full text Add to dashboard Cite

Formation of microdischarges in porous dielectric materials generated by dc high voltage has been investigated. Two geometrical configurations (sandwich type and corona type) and several materials with different pore size and thickness have been tested. The I-V characteristics and current pulse characteristics have been recorded and supplemented with the photographs of the discharge. Stable microdischarges have been successfully generated only using materials with a certain pore size and in the limited range of the I-V characteristics.PACS: 52.80.Tn

show abstract

Simultaneous removal of NO/sub x/, SO/sub x/, and CO/sub 2/ at elevated temperature using a plasma-chemical hybrid process

Cited by 46 publications

References 13 publications

Pilot-Scale Experiment for Simultaneous Dioxin and NO x Removal from Garbage Incinerator Emissions Using the Pulse Corona Induced Plasma Chemical Process

Pilot-Scale Experiment for Simultaneous Dioxin and NO x Removal from Garbage Incinerator Emissions Using the Pulse Corona Induced Plasma Chemical Process

The effects of gas cooling on removal of SOF and sulphate by electrostatic precipitator for marine diesel

Generation of microdischarges in porous materials

Contact Info

Product

Resources

About