Simultaneous removal of sulfur dioxide and polycyclic aromatic hydrocarbons from incineration flue gas using activated carbon fibers

Liu, Zhen-Shu; Li, Wenkai; Hung, Ming‐Jui

doi:10.1080/10962247.2014.922519

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…The tendency for strongly adsorbing sulfur-containing molecules to preferentially occupy surface sites on (and within) the oxide, and therefore gain access to the underlying alloy, decreases. That is to say, the tendency for preferential adsorption of sulfur molecules decreases with increasing temperature [34,35].…”

Section: Discussionmentioning

confidence: 95%

High-Temperature Corrosion of Chromia-Forming Ni-Based Alloys in CO2 Containing Impurities

Oleksak,

Tylczak,

Teeter

et al. 2023

High Temperature Corrosion of mater.

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Future technologies require structural materials resistant to environmental degradation in high temperature CO 2 -rich environments. Herein we exposed several commercially available 263, 282, 617, 625, 740H) to atmospheric pressures gases intended to simulate the compositions expected in future direct-red supercritical CO 2 power cycles. The alloys were exposed to 95% CO 2 + 4% H 2 O + 1% O 2 and the same gas containing 0.1% SO 2 at temperatures of 600, 650, 700, 750, and 800°C for 2500 h. With minor exceptions, chromia scales formed on all alloys at all temperatures in the SO 2 -free gas, yielding parabolic growth rates that followed a clear Arrhenius temperature-dependence. Behavior in the SO 2 -containing gas was more complex. Generally, the alloys performed well at temperatures of 650, 750, and 800°C. While some alloys further performed relatively well across the whole temperature range, several of the alloys experienced chromia failure and higher oxidation rates at temperatures of 600 and 700°C. Deviation from protective behavior was associated with internal sul de formation and, additionally for the case of 600°C, external sulfate formation. The thermodynamic and kinetic factors in uencing the accelerated corrosion in the presence of sulfur are discussed. The results suggest that caution is required when assessing compatibility of Ni-based alloys for CO 2 -based systems when sulfurbased impurities are expected.

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Section: Discussionmentioning

confidence: 95%

High-Temperature Corrosion of Chromia-Forming Ni-Based Alloys in CO2 Containing Impurities

Oleksak,

Tylczak,

Teeter

et al. 2023

High Temperature Corrosion of mater.

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show abstract

“…Precipitation methods including gravitational precipitation, filtration, cyclone, electrostatic precipitators (ESPs) and filters/baghouses are highlighted as methods to suppress the emission of particulates because these techniques are widely used and suitable for combustion derived emissions (MacKenna and Turner, 1989;De Nevers, 2010). Absorption with porous materials is widely used in industry for the control of dioxins from sources with high gas flows (Andersson and Lindgren, 2006;Liu et al, 2014). Catalytic combustion is recommended to minimize the emission of various organic toxins, because these chemicals are poisonous and most of them have recalcitrant structures and cannot be decomposed under moderate conditions.…”

Section: Techniques Applied For Controlling Pollutants During the Commentioning

confidence: 99%

Densification of Biomass and Waste Plastic Blends as a Solid Fuel: Hazards, Advantages, and Perspectives

Song

Hall

2020

Front. Energy Res.

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This mini-review considers the densification of biomass blended with plastic wastes as an approach for waste management and sustainable fuel production from two perspectives; (1) We overviewed the pollutants generated during plastics combustion and their hazards. The control of these pollutants can be achieved as both reported in literature and by currently in-service municipal waste plants. (2) Advantages from densifying biomass/plastic blends as a solid fuel are indicated. Biomass/plastic briquettes or pellets are a potentially promising solid fuel with low costs, high volumetric heating values, high resistance to mechanical damage, and good durability performance under humid conditions. Moreover, the combustion of biomass/plastic blends with <10% plastics has no substantial negative effect on pollutants emission compared with that of biomass. Perspectives on densifying biomass/plastic blends as a solid fuel are proposed to realize the scale-up of this technique.

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“…The complete removal of PAHs from flue gas of the incinerator or combustor is impossible; they can only be controlled. At present, the main PAH control methods are plasma, , catalytic decomposition, , adsorption, − and optimizing the operational parameters. , …”

Section: Introductionmentioning

confidence: 99%

Reduction of Polycyclic Aromatic Hydrocarbon Emission by Porous Alumina Bed Material during Sewage Sludge Incineration

et al. 2016

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In this paper, porous alumina was used as an alternative bed material to reduce polycyclic aromatic hydrocarbon (PAH) emission and improve the combustion efficiency during sewage sludge combustion in a fluidized bed combustor (FBC). To discover the reduction mechanism, the Brunauer–Emmett–Teller (BET) surface area, critical fluidized velocity, and heat-transfer coefficient of three bed materials (silica sand, alumina sand, and porous alumina sand) were characterized. In comparison to the conventional silica bed material, the reduction efficiencies of PAH emission and PAH total toxic equivalent (TEQ) by porous alumina bed material under 850 °C were 52.0 and 97.7%, respectively. Porous alumina bed material had more BET surface area than that of the conventional silica sand, which could adsorb gaseous hydrocarbon and prolong the residence time of hydrocarbon in the diluted zone of the FBC. At the same time, it was well-known that gaseous hydrocarbons were a precursor of PAHs. Thus, PAH formation was suppressed. Moreover, the low heat-transfer coefficient would decrease the heat transmission rate between the bed materials and sewage sludge, which caused the sewage sludge decomposition rate in porous alumina bed material to be lower than that of silica bed material. Hence, less gaseous hydrocarbons and PAHs were formed. In addition, alumina bed material may inhibit agglomeration and enhance the fluidization quality of a fluidized bed incinerator. The above mechanism may account for reducing PAH formation by porous alumina bed material.

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Simultaneous removal of sulfur dioxide and polycyclic aromatic hydrocarbons from incineration flue gas using activated carbon fibers

Cited by 8 publications

References 20 publications

High-Temperature Corrosion of Chromia-Forming Ni-Based Alloys in CO2 Containing Impurities

High-Temperature Corrosion of Chromia-Forming Ni-Based Alloys in CO2 Containing Impurities

Densification of Biomass and Waste Plastic Blends as a Solid Fuel: Hazards, Advantages, and Perspectives

Reduction of Polycyclic Aromatic Hydrocarbon Emission by Porous Alumina Bed Material during Sewage Sludge Incineration

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