Modeling Sorbent Injection for Mercury Control in Baghouse Filters: I—Model Development and Sensitivity Analysis

Flora, Joseph R.V.; Hargis, Richard A.; O’Dowd, William J.; Pennline, Henry W.; Vidić, Radisav D.

doi:10.1080/10473289.2003.10466171

Cited by 35 publications

(33 citation statements)

References 11 publications

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“…The rate-based model showed negligible uptake under standard operating conditions. Similar results were obtained by Flora et al (2003) .…”

Section: Rsupporting

confidence: 81%

Clean Coal Program Research Activities

Baxter¹,

Eddings²,

Fletcher³

et al. 2009

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Although remarkable progress has been made in developing technologies for the clean and efficient utilization of coal, the biggest challenge in the utilization of coal is still the protection of the environment. Specifically, electric utilities face increasingly stringent restriction on the emissions of NO x and SO x , new mercury emission standards, and mounting pressure for the mitigation of CO 2 emissions, an environmental challenge that is greater than any they have previously faced. The Utah Clean Coal Program addressed issues related to innovations for existing power plants including retrofit technologies for carbon capture and sequestration (CCS) or green field plants with CCS.The Program focused on the following areas: simulation, mercury control, oxycoal combustion, gasification, sequestration, chemical looping combustion, materials investigations and student research experiences. The goal of this program was to begin to integrate the experimental and simulation activities and to partner with NETL researchers to integrate the Program's results with those at NETL, using simulation as the vehicle for integration and innovation. The investigators also committed to training students in coal utilization technology tuned to the environmental constraints that we face in the future; to this end the Program supported approximately 12 graduate students toward the completion of their graduate degree in addition to numerous undergraduate students. With the increased importance of coal for energy independence, training of graduate and undergraduate students in the development of new technologies is critical.ii

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“…The rate-based model showed negligible uptake under standard operating conditions. Similar results were obtained by Flora et al (2003) .…”

Section: Rsupporting

confidence: 81%

Clean Coal Program Research Activities

Baxter¹,

Eddings²,

Fletcher³

et al. 2009

View full text Add to dashboard Cite

show abstract

“…A number of kinetic models that describe heavy metal adsorption processes, mainly from liquid phase, have been studied. 15,16 Some of them are based on the diffusion of gas molecules inside the adsorbent porous network, while others take into account the pollutant mass balance inside the column. A very small number of studies have examined simplified models based on a combination of internal particle and external mass transfer theories with isothermal adsorption and powdered injection procedures.…”

Section: Introductionmentioning

confidence: 99%

“…In an ideal plug flow system with no resistance to mass transfer, by neglecting the axial dispersion term and by assuming that the rate of adsorption is given by a first order kinetic expression k c, Equation 13 can be simplified to Equation 14: (15) where k is the kinetic constant, k 0 is the initial value of k and h 0 is the dimensionless variable.…”

mentioning

confidence: 99%

Study of Mercury Adsorption by Low-Cost Sorbents Using Kinetic Modeling

Fuente-Cuesta

Diamantopoulou

López-Antón

et al. 2015

Ind. Eng. Chem. Res.

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In order to make further progress in the field of reducing mercury emissions to the atmosphere it is necessary to develop efficient and economically viable technologies.Low-cost solid sorbents are a candidate technology for mercury capture. However, kinetic models are required to predict the adsorption mechanism and to optimize the design of the process. In this study, several low-cost materials (biomass chars) were evaluated for the removal of gas-phase elemental mercury and kinetic studies were performed to investigate the mechanism of mercury adsorption. These kinetic studies were also used to predict the behavior of a fixed bed column. The models applied were pseudo-first and pseudo-second order equations, Fick´s intraparticle diffusion model and Yoon-Nelson´s model. The chars obtained from the gasification of plastic-paper waste demonstrated the best behaviour for mercury capture due to their high BET surface area, large total pore volume (mainly micropore volume) and high chlorine content. The Yoon-Nelson model provided a better fitting for the samples with low mercury retention capacities, while in the case of the plastic-paper chars all the models provided relatively accurate predictions because their highly microporous structure retarded the internal diffusion process and their increased chlorine content enhanced chemisorption on their surface.

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“…Because the diffusion coefficient of Hg in air was determined to be 0.22 cm 2 /s by Chapman-Enskog theory (Meserole et al 1999;Flora et al 2003), the dispersion coefficient was obtained using equation (2). Using equations (1) and (2), the number of layers (N) was determined to be less than 1; therefore, each layer was assumed to behave like a continuous stirred tank reactor (CSTR).…”

Section: Modelling Proceduresmentioning

confidence: 99%

“…The total length of sorbent layers in the filter was calculated based on the amount of sorbent particles accumulated in the filter at a sorbent loading of 15 mg/m 3 . An empirical correlation was used to determine the dispersion coefficient (Flora et al 2003):…”

Section: Modelling Proceduresmentioning

confidence: 99%

Mathematical Model of Mercury Capture in the Filter of an Entrained-Flow Reactor System

Keener

Lee

2012

Adsorption Science & Technology

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ABSTRACT:Results of full-scale tests have shown that mercury capture in a fabric filter is more effective than in an electrostatic precipitator. This is in accordance with our previous experimental results in which significant amounts of oxidized mercury were easily adsorbed in the filter rather than in the entrained-flow reactor portion. In this study, mercury capture in the filter was modelled using a tanks-in-series model. Based on the experimental results of this study, we conclude that the modelling results predicted an effective mercury capture in the filter.

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Modeling Sorbent Injection for Mercury Control in Baghouse Filters: I—Model Development and Sensitivity Analysis

Cited by 35 publications

References 11 publications

Clean Coal Program Research Activities

Clean Coal Program Research Activities

Study of Mercury Adsorption by Low-Cost Sorbents Using Kinetic Modeling

Mathematical Model of Mercury Capture in the Filter of an Entrained-Flow Reactor System

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