Metal sorbents for high temperature mercury capture from fuel gas

Poulston, Stephen; Granite, Evan J.; Pennline, Henry W.; Myers, Christina R.; Stanko, Dennis P.; Hamilton, Hugh; Rowsell, Liz; Smith, A. W.; Ilkenhans, Thomas; Chu, Wilson

doi:10.1016/j.fuel.2007.05.015

Cited by 91 publications

(65 citation statements)

References 11 publications

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“…This was confirmed in a recent lab scale study conducted by Poulston et al [41] in fuel gasification gases containing Hg el . Mercury adsorption capacity of platinum Pt and palladium Pd supported on Al 2 O 3 were measured at temperatures between 204 and 388 °C in simulated fuel gases.…”

Section: Activity Of Platinum Group Based Catalysts For the Oxidationsupporting

confidence: 71%

“…Mercury adsorption capacity of platinum Pt and palladium Pd supported on Al 2 O 3 were measured at temperatures between 204 and 388 °C in simulated fuel gases. Up to 14 wt.-% Hg was detected in the Pd-based material [41,42]. In the presence of halogens the Pt group based catalysts oxidizes mercury.…”

Section: Activity Of Platinum Group Based Catalysts For the Oxidationmentioning

confidence: 99%

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Oxidation Catalysts for Elemental Mercury in Flue Gases—A Review

2012

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Abstract:The removal of mercury from flue gases in scrubbers is greatly facilitated if the mercury is present as water-soluble oxidized species. Therefore, increased mercury oxidation upstream of scrubber devices will improve overall mercury removal. For this purpose heterogeneous catalysts have recently attracted a great deal of interest. Selective catalytic reduction (SCR), noble metal and transition metal oxide based catalysts have been investigated at both the laboratory and plant scale with this objective. A review article published in 2006 covers the progress in the elemental mercury (Hg el ) catalytic oxidation area. This paper brings the review in this area up to date. To this end, 110 papers including several reports and patents are reviewed. For each type of catalyst the possible mechanisms as well as the effect of flue gas components on activity and stability are examined. Advantages and main problems are analyzed. The possible future directions of catalyst development in this environmental research area are outlined.

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Section: Activity Of Platinum Group Based Catalysts For the Oxidationsupporting

confidence: 71%

Section: Activity Of Platinum Group Based Catalysts For the Oxidationmentioning

confidence: 99%

Oxidation Catalysts for Elemental Mercury in Flue Gases—A Review

2012

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“…21,22 Metal and metal oxide nanoparticles were among the most intensively studied Hg 0 adsorbents in previous studies. [23][24][25] In particular, noble metal nanoparticles, such as silver and gold, are the most intriguing ones, 20,24,26,27 which can efficiently capture mercury vapour by forming Ag-Hg or Au-Hg amalgam at temperatures close to ue gas conditions and can be regenerated by release of captured mercury through thermal treatment, providing a feasible way to regenerate mercury adsorbents. Meanwhile, surface functional groups (e.g.…”

Section: 10-12mentioning

confidence: 99%

Nanocomposites of graphene oxide, Ag nanoparticles, and magnetic ferrite nanoparticles for elemental mercury (Hg⁰) removal

et al. 2015

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=3ad27da5-41b3-490a-9f79-95c9fb750232 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=3ad27da5-41b3-490a-9f79-95c9fb750232 Mercury emission from combustion flue gas causes considerable environmental challenges and serious adverse health threats, and elemental mercury (Hg 0 ) is the most challenging chemical form for removal.In this work, four types of graphene oxide (GO) based composite adsorbents were successfully synthesized by depositing Ag nanoparticles (NPs) and/or magnetic ferrite NPs on GO sheets (denoted as GO, GO-Ag, MGO and MGO-Ag), characterized and applied for the removal of Hg 0 for the first time.The presence of Ag NPs on GO greatly enhances the Hg 0 removal capability of GO-Ag and MGO-Ag as compared to that of pure GO, which is mainly attributed to the amalgamation of Hg 0 on Ag NPs. MGOAg shows the best Hg 0 removal performance and thermal tolerance among the four types of adsorbents developed, which can effectively capture Hg 0 up to 150-200 C in a simulated flue gas environment and can be also effectively recycled and reused. Our results indicate that the graphene oxide based composites (i.e. MGO-Ag) have significant potential applications for mercury emission control in coalfired power plants.

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“…Of these, palladium and platinum were found to have the greatest capacity for mercury at the desired conditions, with palladium supported on alumina having the highest capacity for mercury. A more detailed study of mercury capture by palladium and platinum as a function of the metal loading on the support and the adsorption temperature yielded the optimum metal loading and adsorption temperature for mercury adsorption [3]. In that study, it was suggested that mercury capacity depended on the metal loading of the support and not on metal dispersion.…”

Section: Introductionmentioning

confidence: 98%

“…The research has resulted in a method for high temperature mercury capture from gas streams [1]. The approach to developing a sorbent for mercury was to screen a number of potential supported metals as sorbents [2] and then perform more focussed studies on the best sorbents [3].…”

Section: Introductionmentioning

confidence: 99%

Surface characterization of Pd/Al₂O₃sorbents for mercury capture from fuel gas

Baltrus

Granite

Stanko

et al. 2008

Main Group Chemistry

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The surface composition of a series of Pd/alumina sorbents has been characterized to better understand the factors influencing their ability to adsorb mercury from fuel gas. Both a temperature effect and a dispersion effect were found. Maximum adsorption of Hg occurred at the -lowest temperature tested, 204°C, and decreased with increasing temperatures. Maximum adsorption of Hg on a per-atom basis of Pd is observed at low loadings of Pd ( < S.5% Pd) due to better dispersion of Pd at those loadings; a change in its partitioning occurs at higher loadings. The presence of H2S "in the fuel gas acts to promote the adsorption of Hg through its association with Hg in the Pd lattice.

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Metal sorbents for high temperature mercury capture from fuel gas

Cited by 91 publications

References 11 publications

Oxidation Catalysts for Elemental Mercury in Flue Gases—A Review

Oxidation Catalysts for Elemental Mercury in Flue Gases—A Review

Nanocomposites of graphene oxide, Ag nanoparticles, and magnetic ferrite nanoparticles for elemental mercury (Hg⁰) removal

Surface characterization of Pd/Al₂O₃sorbents for mercury capture from fuel gas

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Metal sorbents for high temperature mercury capture from fuel gas

Cited by 91 publications

References 11 publications

Oxidation Catalysts for Elemental Mercury in Flue Gases—A Review

Oxidation Catalysts for Elemental Mercury in Flue Gases—A Review

Nanocomposites of graphene oxide, Ag nanoparticles, and magnetic ferrite nanoparticles for elemental mercury (Hg0) removal

Surface characterization of Pd/Al2O3sorbents for mercury capture from fuel gas

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Product

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Nanocomposites of graphene oxide, Ag nanoparticles, and magnetic ferrite nanoparticles for elemental mercury (Hg⁰) removal

Surface characterization of Pd/Al₂O₃sorbents for mercury capture from fuel gas