Development of Clean Diesel NOx After-treatment System with Sulfur Trap Catalyst

Nishioka, Hiromasa; Yoshida, Kohei; Asanuma, Takamitsu; Fukuma, Takao

doi:10.4271/2010-01-0303

Cited by 12 publications

(7 citation statements)

References 7 publications

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“…Figure 11 shows the experimental setup for the characterization of the desulfurization breakthrough of Na-doped CaCO 3 that was washcoated on the monolith, and a schematic of the monolith reactor is shown in Figure 12. This experimental equipment consists of an exhaust gas synthesizer (a monolith reactor controlled by the reaction temperature) for absorbing SO 2 , sampling liquid for capturing SO 2 as SO 4 2− , and an ion chromatograph for measuring the concentration of SO 4 2− . This ion chromatograph can be measured for SO 4 2− concentration under 100 ppm.…”

Section: Experiments Of Desulfurization Breakthrough Of Caco 3 Washcoamentioning

confidence: 99%

“…This experimental equipment consists of an exhaust gas synthesizer (a monolith reactor controlled by the reaction temperature) for absorbing SO 2 , sampling liquid for capturing SO 2 as SO 4 2− , and an ion chromatograph for measuring the concentration of SO 4 2− . This ion chromatograph can be measured for SO 4 2− concentration under 100 ppm. Thus, this experiment can be achieved measuring 0.1% of SO 2 absorption efficiency.…”

Section: Experiments Of Desulfurization Breakthrough Of Caco 3 Washcoamentioning

confidence: 99%

“…However, even if "sulfur-free" fuels are widely introduced, the problem of poisoning of the catalyst by the remaining sulfur cannot be prevented [3]. Based on a report by Nishioka et al [4], to eliminate sulfur poisoning, the sulfur content should be less than 1.4 g SO 2 /2.0 L -cat . Currently, a significant amount of fuel is being utilized as a heat source to repair the sulfur poisoning of the NSR catalyst.…”

Section: Introductionmentioning

confidence: 98%

“…Like NO, SO 2 in the oxygen-rich exhaust undergoes similar chemical conversion on the PM component of the catalyst. Thus, formed SO 3 eventually gets stored as BaSO 4 . Because BaSO 4 is thermodynamically more stable than Ba(NO 3 ) 2 [1], this process leads to the catalyst deactivation as the available storage sites are gradually consumed.…”

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Study on SO₂-Absorption Behavior of Composite Materials for DeSO_xFilter From Diesel Exhaust

Osaka

Kurahara

Kobayashi

et al. 2014

Heat Transfer Engineering

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4DENOSO Corporation, Kariya city, Aichi Prefecture, Japan NO x emitted from diesel engines is one of the major air pollutants in most countries. To reduce NO x emission, NO x storage/reduction (NSR) catalysts have been developed for diesel systems. The catalyst for NSR is strongly poisoned with sulfur. This paper reports the synthesis of Na-doped CaCO 3 as a new material for SO 2 adsorption. Measurements of the desulfurization breakthrough characteristics using monolith washcoated Na-doped CaCO 3 were investigated at 450 • C. The Na-doped CaCO 3 absorbed ∼77.6-90.6 mg -SO 2 /g -material of SO 2 at 450 • C (where CaCO 3 is 8 mg -SO 2 /g -material ). Investigation of the source of the improved sulfur absorption capacity of the Na-doped CaCO 3 relative to the parent material via x-ray diffraction (XRD) and scanning electron microscopy-energy-dispersive x-ray spectroscopy (SEM-EDX) analyses revealed that the new material forms a composite partially composed of Na 2 Ca(CO 3 ) 2 . The enhanced SO 2 absorption capacity derived from the formation of composite materials is demonstrated herein. SO 2 contained in the exhaust gas is absorbed at a lower temperature than with previously reported systems. In order to elucidate the SO 2 absorption mechanism of the composite materials, further studies and synthesis of materials with greater absorption capacity are required.

show abstract

Section: Experiments Of Desulfurization Breakthrough Of Caco 3 Washcoamentioning

confidence: 99%

Section: Experiments Of Desulfurization Breakthrough Of Caco 3 Washcoamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Study on SO₂-Absorption Behavior of Composite Materials for DeSO_xFilter From Diesel Exhaust

Osaka

Kurahara

Kobayashi

et al. 2014

Heat Transfer Engineering

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show abstract

“…Nishioka [6] investigated the low-temperature reaction activity using a platinum catalyst. The application of activated carbon to the removal of SO 2 from flue gas has received attention due to its low temperature SO 2 removal and available H 2 SO 4 byproducts [7,8].…”

mentioning

confidence: 99%

Removal of sulfur dioxide from diesel exhaust gases by using dry desulfurization MnO2 filter

Osaka

Kito

Kobayashi

et al. 2015

Separation and Purification Technology

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Improvement of dry desulfurization performance using activated calcium carbonate by amorphous citric acid complex method for diesel gas purification

Osaka

Tsujiguchi

Kodama

et al. 2020

J Mater Cycles Waste Manag

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Development of Clean Diesel NOx After-treatment System with Sulfur Trap Catalyst

Cited by 12 publications

References 7 publications

Study on SO₂-Absorption Behavior of Composite Materials for DeSO_xFilter From Diesel Exhaust

Study on SO₂-Absorption Behavior of Composite Materials for DeSO_xFilter From Diesel Exhaust

Removal of sulfur dioxide from diesel exhaust gases by using dry desulfurization MnO2 filter

Improvement of dry desulfurization performance using activated calcium carbonate by amorphous citric acid complex method for diesel gas purification

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Development of Clean Diesel NOx After-treatment System with Sulfur Trap Catalyst

Cited by 12 publications

References 7 publications

Study on SO2-Absorption Behavior of Composite Materials for DeSOxFilter From Diesel Exhaust

Study on SO2-Absorption Behavior of Composite Materials for DeSOxFilter From Diesel Exhaust

Removal of sulfur dioxide from diesel exhaust gases by using dry desulfurization MnO2 filter

Improvement of dry desulfurization performance using activated calcium carbonate by amorphous citric acid complex method for diesel gas purification

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Product

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Study on SO₂-Absorption Behavior of Composite Materials for DeSO_xFilter From Diesel Exhaust

Study on SO₂-Absorption Behavior of Composite Materials for DeSO_xFilter From Diesel Exhaust