Preparation and characterization of high efficiency modified activated carbon for the capture of mercury from flue gas in coal-fired power plants

Wade, Colin B.; Thurman, Chad; Freas, William; Student, James J.; Matty, David J; Mohanty, Dillip K

doi:10.1016/j.fuproc.2012.01.017

Cited by 14 publications

(4 citation statements)

References 30 publications

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“…Various methods have been used for removing heavy metals from aqueous environment such as reverse osmosis, chemical precipitation, ion exchange, coagulation and adsorption [3]. Many carbon-based nanoparticles (CNTs) have been developed to remove heavy metals from aqueous media [2,[4][5][6]. They are promising material for numerous applications due to their unique electrical, mechanical, thermal, optical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of mercury ions from synthetic and real wastewater aqueous solution by functionalized multi-walled carbon nanotube with both amino and thiolated groups

Hadavifar¹,

Bahramifar²,

Younesi³

et al. 2014

Chemical Engineering Journal

304

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The functionalization of multi-walled carbon nanotubes (MWCNTs) was using with ethylenediamine and cyanuric chloride and sodium 2-mercaptoethanol as efficient ways to introduce amine and thiol functional groups onto the nanotube sidewalls. The synthesized amino and thiolated MWCNTs were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). A series of batch adsorption experiments were conducted to study the effect of pH, dose, metal concentration and temperature on Hg(II) uptake by the functionalized, MWCNTs. The isotherm data were analyzed for possible agreement with the Langmuir than Freundlich models, while the equilibrium data were fitted better by Langmuir model. The pseudo-first-order and pseudo-second-order rate equations were tested on kinetic

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Section: Introductionmentioning

confidence: 99%

Adsorption of mercury ions from synthetic and real wastewater aqueous solution by functionalized multi-walled carbon nanotube with both amino and thiolated groups

Hadavifar¹,

Bahramifar²,

Younesi³

et al. 2014

Chemical Engineering Journal

304

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“…Figure 3 displays the XRD patterns of the prepared samples. The broad peak centered at around 25 • can be assigned to the (002) reflection of the AC substrate [31,32], which verified the existence of micro-graphitic structure of the AC. Another sharp peak centered at 28.4 • can also be clearly observed for all samples, which can be assigned to the characteristic XRD pattern of the loaded HgCl 2 species [33].…”

Section: Resultsmentioning

confidence: 64%

Acetylene Abatement Over Micro/Mesoporous Active Carbon-Supported Low-Mercury Catalysts

et al. 2018

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A series of low HgCl2-supported catalysts (K-TX-O, K-WG-O, K-S20-O, K-S40-O, K-Fe0.8-O, K-Fe0.8-M, D-Fe0.8-M) was prepared and investigated for C2H2 catalytic abatement during highly purified HCl (HP-HCl) production process. The samples of D-Fe0.8-M, K-Fe0.8-M, and K-Fe0.8-O were found to exhibit much higher activities and better thermal stabilities than those of other samples. The characterization results of XRD, N2 adsorption/desorption, SEM, back scattered electron (BSE) and thermogravimetry (TG) revealed that: (i) the larger mesoporous volumes constituted one of the key factors leading to superior catalytic performances of D-Fe0.8-M, K-Fe0.8-M, and K-Fe0.8-O, which greatly facilitated better dispersions of the loaded HgCl2 species in comparison to other samples; (ii) the KCl additive could further improve the dispersions and thermal stabilities of the loaded the HgCl2 species due to the strong interactions between KCl and HgCl2 species, resulting in relatively higher catalytic behaviors of D-Fe0.8-M and K-Fe0.8-M than that of K-Fe0.8-O; (iii) the KCl/HgCl2 step-by-step loading strategy, wherein the KCl was initially loaded on the Fe0.8-AC substrate thereafter followed by HgCl2 loading, could further improve the catalytic behavior for D-Fe0.8-M due to additional improvements of HgCl2 dispersions. The deactivation and reactivation of D-Fe0.8-M during HP-HCl were also investigated, which suggested that partial deactivated D-Fe0.8-M by C2H3Cl accumulation could be efficiently reactivated by HCl treatment at T = 220 °C.

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“…Similar experimental work and modeling attempts were investigated by Chen and co-workers, Serre et al, and Scala [15][16][17][18][19]. Many other researches thoroughly deal with experimental evaluation for the capability of various adsorbents to remove effectively the mercury species [1][2][3][4][5][6]. Hence, chemical trapping of mercury in the form of cinnabar, a stable nonvolatile mercury ore, is the most commonly used mercury removal method for natural gas [52][53][54][55].…”

Section: Introductionmentioning

confidence: 75%

“…Commercial trapping products differ in the nature of the trapping agent and/or the support material. The principle types of mercury trapping agents are elemental sulfur, metal sulfides, metal oxides, activated carbon, iodine, silver, and gold [1][2][3][4][5][6]. Silver and gold active phases are simply based on effective amalgamation removal with regeneration potential.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Effect of Operating Parameters on the Efficiency of a Mercury Removal Unit from Natural Gas

Mohsen¹,

Farouq

Farag

et al. 2019

Civil and Environmental Engineering Reports

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In this study, an industrial fixed-bed for mercury adsorption from natural gas, was evaluated by mathematical models. Equilibrium isotherms, kinetics equations, and adsorption models were applied to available data to evaluate sorbent characteristics, and then study bed’s performance under different case studies. Models solutions are evaluated by linear-regression and coefficient of determination. The study confirmed that the system is characterized by irreversible equilibrium. Examining of kinetics equations indicated the inclusion of chemisorption and intra-particle diffusion as ratelimiting steps. Bohart-Adams model was found the best fitting model with good match between model’s assumptions and available bed’s information. Model prediction for bed’s design-basis was examined and found good match with manufacturer’s data-sheet.

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Preparation and characterization of high efficiency modified activated carbon for the capture of mercury from flue gas in coal-fired power plants

Cited by 14 publications

References 30 publications

Adsorption of mercury ions from synthetic and real wastewater aqueous solution by functionalized multi-walled carbon nanotube with both amino and thiolated groups

Adsorption of mercury ions from synthetic and real wastewater aqueous solution by functionalized multi-walled carbon nanotube with both amino and thiolated groups

Acetylene Abatement Over Micro/Mesoporous Active Carbon-Supported Low-Mercury Catalysts

A Study on the Effect of Operating Parameters on the Efficiency of a Mercury Removal Unit from Natural Gas

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