Mechanistic study on adsorption and reduction of NO2 over activated carbon fibers

Shirahama, Noriaki; Moon, Seung Hyun; Choi, Ki Hyouk; Enjoji, Takashi; Kawano, Shizuo; Korai, Yozo; Tanoura, Manazumi; Mochida, Isao

doi:10.1016/s0008-6223(02)00190-2

Cited by 124 publications

(107 citation statements)

References 12 publications

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“…Studies by Guo et al (2001) showed good results for the catalytic oxidation of NO and NO 2 on activated PAN fibers and activated carbon produced from coconut shells in experiments performed at room temperature. Studies by and Shirahama et al (2002) demonstrated the kinetics and efficiency of the oxidation and reduction of NO in activated carbon fibers. This happens due to the increase of oxygen functional groups on the surface .…”

Section: No X Removal By Activated Carbon Fibersmentioning

confidence: 99%

Adsorption of SOX and NOX in activated viscose fibers

Plens

Monaro

Coutinho

2015

An. Acad. Bras. Ciênc.

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SO x and NO x are emissions resulting from combustion processes and are the main agents that contribute to the formation of acid rain, which causes harm to humans and the environment. Several techniques for removing these pollutants are applied in i.e. oil refineries, thermoelectric that use petroleum oils and vehicular pollution. Among these, highlight the adsorption of contaminants by the usage of activated carbon fibers and activated carbon, which are characterized by high surface area and uniform distribution of pores, providing appropriate conditions for application in processes of removing environmental contaminants. In the present work, activated viscose fibers (AVF) were prepared and applied in adsorption experiments of NO and SO 2 . The materials produced showed high values of surface area, with a predominance of micro pores with diameters in the range of 1.0 nm. The AVF had satisfactory performance in the removal of contaminants and are compatible with other synthetic fibers. Thus, the formation of active sites of carbon provides contaminants adsorption, demonstrating that carbon fibers cloth can be applied for the removal of pollutants.

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Section: No X Removal By Activated Carbon Fibersmentioning

confidence: 99%

Adsorption of SOX and NOX in activated viscose fibers

Plens

Monaro

Coutinho

2015

An. Acad. Bras. Ciênc.

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“…The kinetics of NO x removal by carbon of commercial origin has been studied by many researchers (Claudino et al, 2004;Klose and Rincón, 2007;Mochida et al, 1994;Shirahama et al, 2002;Teng and Suuberg, 1993;Zhang et al, 2008) and it has been concluded that the origin, the natural impurities in the feedstock, surface chemistry and the conditions used to prepare activated carbon are the main factors that can control its efficiency for NO x reduction (Xu et al, 2003). Although there has been much research into NO x control using activated carbons, the factors controlling the NO x adsorption process are still not clear.…”

Section: Introductionmentioning

confidence: 99%

Waste-derived activated carbons for control of nitrogen oxides

Al-Rahbi

Nahil

Wu³

et al. 2016

Proceedings of the Institution of Civil Engineers - Waste and R

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Activated carbons were produced from waste and investigated for their efficiency for the removal of mono-nitrogen oxides (NO x ) in simulated flue gases at a low temperature. The wastes used were waste biomass (date seeds), processed municipal solid waste in the form of refuse-derived fuel and waste tyres. The morphology, porous texture and surface chemistry of the prepared activated carbons were evaluated by scanning electron microscopy, energydispersive X-ray spectrometry, nitrogen adsorption and Boehm titration, and were compared with several commercial activated carbons. The carbons were then investigated in terms of their use in adsorbing NO x at a low temperature.The waste-derived activated carbons had NO x adsorption efficiencies at 50°C which were between 50 and 70% of those achieved for the commercial activated carbons. Increasing the adsorption temperature from 25 to 100°C significantly reduced nitrogen oxide (NO) adsorption. It was also shown that the NO adsorption efficiency depends on the porous structure, particularly the presence of micropores in the activated carbon, but to a lesser extent on the surface area of the carbons and acid-base surface groups on the carbon surface.

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“…AC is usually prepared from the pyrolysis and the following activation, either by physical or chemical processes, of coal, wood byproducts, various types of cellulose materials and pitches (Ahmadpour and Do, 1996;Molina-Sabio et al, 1996). These AC, with large porous structure and high surface area, is broadly studied and used in many practical applications (Mochida et al, 2000;Shirahama et al, 2002;Lee et al, 2002). Nevertheless, the influence of the type of active carbon on NO x adsorption capacity has shown equivocal consequences.…”

Section: Introductionmentioning

confidence: 99%

Development of an Innovative Circulating Fluidized-Bed with Microwave System for Controlling NOx

Chang

Yan

Tseng

et al. 2012

Aerosol Air Qual. Res.

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Selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) technique are widely used to control nitrogen oxides emissions. However, both techniques have a general shortcoming known as NH 3 slip.This research introduced the design of activated carbon in a circulating fluidized-bed with microwave system and developed an innovative de-NO x technique. The whole system demonstrated the capability and advantage of reducing reductant cost and continuous process. The experiments investigated microwave to regenerate activated carbon (AC) in order to increase adsorption and destruction efficiency while reducing energy consumption. In the NO x abatement process, activated carbon adsorbed NO and NO 2 and then utilized microwave heating technology to regenerate itself because of microwave's high energy utilization and strong penetration ability. The specific surface areas of AC increased from 673.03 to 834.52 (m 2 /g) when microwave power was increased from 0 to 550 W, respectively, in this study. Through increasing the specific surface area, the microwave treatment further improved the NO x adsorption capacity and rate.In consequence, the results indicated that destruction efficiency of NO and NO 2 at 200 ppm could reach about 80% with microwave power of 350 W and above 85% of 550 W. The destruction efficiency at 550 W for NO x was about 77%.

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Mechanistic study on adsorption and reduction of NO2 over activated carbon fibers

Cited by 124 publications

References 12 publications

Adsorption of SOX and NOX in activated viscose fibers

Adsorption of SOX and NOX in activated viscose fibers

Waste-derived activated carbons for control of nitrogen oxides

Development of an Innovative Circulating Fluidized-Bed with Microwave System for Controlling NOx

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