Mercury chemistry in simulated flue gases related to waste incineration conditions

Hall, Bjoern; Lindqvist, Oliver; Ljungstroem, E.

doi:10.1021/es00071a013

Cited by 107 publications

(86 citation statements)

References 6 publications

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“…The chemistry of mercury species in simulated flue gases was studied by Hall et al 88,89 using atomic absorbtion spectroscopy. They reported that mercury exists primarily in its elemental form at temperatures greater than 500 °C.…”

Section: Transformation Of Metallic Speciesmentioning

confidence: 99%

Control of Toxic Metal Emissions from Combustors Using Sorbents: A Review

Biswas

1998

Journal of the Air & Waste Management Association

172

123

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This paper constitutes a review of the control of toxic metal emissions using sorbents. The objective of sorbent-injection methods is to effectively capture the metal species (preferably transform it to an environmentally benign form) and to suppress the fraction in the submicrometer mode. The design of an effective sorbent-injection methodology thus requires an understanding of the fate of the metallic species and its transformation pathways (transfer to the gas phase, subsequent chemistry at high temperatures, and aerosol formation and growth dynamics) in the combustor. Several different sorbent methodologies used for metals capture are discussed, and a mechanistic description is provided. The need for further experimentation and pilot scale testing is also emphasized.

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Section: Transformation Of Metallic Speciesmentioning

confidence: 99%

Control of Toxic Metal Emissions from Combustors Using Sorbents: A Review

Biswas

1998

Journal of the Air & Waste Management Association

172

123

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“…Both NO 2 and O 2 have been suggested as important oxidants; 19,27 other work has shown these species to have little effect. 28 In the presence of fly ash, NO 2 was found to increase the oxidation rate, while NO inhibited oxidation in most cases. 29 …”

Section: Homogeneous Oxidationmentioning

confidence: 93%

Modeling the Impact of Elevated Mercury in Defense Waste Processing Facility Melter Feed on the Melter Off-Gas System-Preliminary Report

Zamecnik¹,

Choi²

2010

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“…The results concurred with literature published previously. 14,34 In addition to the surface area, sulfur content also affects the equilibrium adsorptive capacity of HgCl 2 for WPAC. Three types of WPACs, including WP3, WP3-S1, and WP3-S2, were tested in the study.…”

Section: Influence Of Pac Properties On the Equilibriummentioning

confidence: 99%

The Adsorptive Capacity of Vapor-Phase Mercury Chloride onto Powdered Activated Carbon Derived from Waste Tires

Lin

Yuan

et al. 2006

Journal of the Air & Waste Management Association

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Injection of powdered activated carbon (PAC) upstream of particulate removal devices (such as electrostatic precipitator and baghouses) has been used effectively to remove hazardous air pollutants, particularly mercurycontaining pollutants, emitted from combustors and incinerators. Compared with commercial PACs (CPACs), an alternative PAC derived from waste tires (WPAC) was prepared for this study. The equilibrium adsorptive capacity of mercury chloride (HgCl 2 ) vapor onto the WPAC was further evaluated with a self-designed bench-scale adsorption column system. The adsorption temperatures investigated in the adsorption column were controlled at 25 and 150°C. The superficial velocity and residence time of the flow were 0.01 m/sec and 4 sec, respectively. The adsorption column tests were run under nitrogen gas flow. Experimental results showed that WPAC with higher Brunauer-Emmett-Teller (BET) surface area could adsorb more HgCl 2 at room temperature. The equilibrium adsorptive capacity of HgCl 2 for WPAC measured in this study was 1.49 ϫ 10 Ϫ1 mg HgCl 2 /g PAC at 25°C with an initial HgCl 2 concentration of 25 g/m 3 . With the increase of adsorption temperature Յ150°C, the equilibrium adsorptive capacity of HgCl 2 for WPAC was decreased to 1.34 ϫ 10 Ϫ1 mg HgCl 2 /g PAC. Furthermore, WPAC with higher sulfur contents could adsorb even more HgCl 2 because of the reactions between sulfur and Hg 2ϩ at 150°C. It was demonstrated that the mechanisms for adsorbing HgCl 2 onto WPAC were physical adsorption and chemisorption at 25 and 150°C, respectively. Experimental results also indicated that the apparent overall driving force model appeared to have the good correlation with correlation coefficients (r) Ͼ0.998 for HgCl 2 adsorption at 25 and 150°C. Moreover, the equilibrium adsorptive capacity of HgCl 2 for virgin WPAC was similar to that for CPAC at 25°C, whereas it was slightly higher for sulfurized WPAC than for CPAC at 150°C.

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Mercury chemistry in simulated flue gases related to waste incineration conditions

Cited by 107 publications

References 6 publications

Control of Toxic Metal Emissions from Combustors Using Sorbents: A Review

Control of Toxic Metal Emissions from Combustors Using Sorbents: A Review

Modeling the Impact of Elevated Mercury in Defense Waste Processing Facility Melter Feed on the Melter Off-Gas System-Preliminary Report

The Adsorptive Capacity of Vapor-Phase Mercury Chloride onto Powdered Activated Carbon Derived from Waste Tires

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