Mass spectrometric and Knudsen-cell vaporization studies of group 2B-6B compounds

Goldfinger, Paul; Jeunehomme, M.

doi:10.1039/tf9635902851

Cited by 301 publications

(77 citation statements)

References 1 publication

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“…As we have noted previously, all of the mercuric halides are stable gas phase species; however, for most of the coal burned during the Crist campaign more than 95% was present as Cl and less than 1% was present as Br, hence HgBr 2 is not viable as an RGM candidate. Sulfur typically constituted 1% by weight of the coal burned; however, HgS is not a stable gas phase species [16] and the PTD profiles of HgS are not consistent with our observations.…”

Section: Rgm Speciationcontrasting

confidence: 56%

Programmable Thermal Dissociation of Reactive Gaseous Mercury, a Potential Approach to Chemical Speciation: Results from a Field Study

et al. 2014

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Based on "Tatum Ernest, C.; Donohoue, D.; Bauer, D.; Ter Schure, A.; Hynes, A.J. Programmable thermal dissociation of reactive gaseous mercury-A potential approach to chemical speciation: Results from a field study. Atmos. Chem. Phys. Discuss. 2012, 12, 33291-33322 ). RGM was collected on denuders and analyzed using PTD. The technique was tested in a field campaign at a coal-fired power plant in Pensacola, Florida. Stack gas samples were collected from ducts located after the electrostatic precipitator and prior to entering the stack. An airship was used to sample from the stack plume, downwind of the stack exit. The PTD profiles from these samples were compared with PTD profiles of HgCl 2 . Comparison of stack and in-plume samples suggest that the chemical speciation are the same and that it is possible OPEN ACCESSAtmosphere 2014, 5 576 to track a specific chemical form of RGM from the stack and follow its evolution in the stack plume. Comparison of the measured plume RGM with the amount calculated from in-stack measurements and the measured plume dilution suggest that the stack and plume RGM concentrations are consistent with dilution. The PTD profiles of the stack and plume samples are consistent with HgCl 2 being the chemical form of the sampled RGM. Comparison with literature PTD profiles of reference mercury compounds suggests no other likely candidates for the speciation of RGM.

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Section: Rgm Speciationcontrasting

confidence: 56%

Programmable Thermal Dissociation of Reactive Gaseous Mercury, a Potential Approach to Chemical Speciation: Results from a Field Study

et al. 2014

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“…[19] The Gibbs energies are from an equation given in the caption of their Fig. 6 and are calculated for each temperature in that figure, which is a plot of log K versus 1000/T.…”

Section: Partial Pressure Datamentioning

confidence: 99%

High Temperature Thermodynamic Data for CdTe(c)

Brebrick

2010

J. Phase Equilib. Diffus.

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The high temperature heat capacity, Gibbs energy of formation, and standard enthalpy and entropy of formation at 298 K are combined with thermodynamic data for Cd and revised data for Te to provide an internally consistent data set for CdTe(c). Equations are given for the Gibbs energy of formation from Cd(g) and Te 2 (g) and from the solid or liquid elements as a function of temperature. These give values similar to those used before. However, the derived enthalpy and entropy of formation are significantly different due to a revised heat capacity for CdTe(c). The standard enthalpy and entropy of formation at 298.15 K from the gases are 2293262 J/mol and 2200.593 J/mol K, respectively. From the solid elements they are 2100270 and 24.5334.

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“…The dissociative sublimation (eq. [4]) is known to be congruent (14) and the concentration of molecular ZnS in the vapour in our temperature range is negligible (15). Also, there is insignificant contribution from S,(g) (n > 2 or n = 1) in the gas phase in this temperature range (16).…”

Section: Reaction Stoichiometrymentioning

confidence: 94%

The thermodynamics of zinc sulphide transport in hydrogen chloride by modified entrainment

Gardner¹,

Pang²

1988

Can. J. Chem.

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The equilibrium ZnS(c, sphalerite) + 2HCl(g) = ZnCl2(g) + H2S(g) was studied by modified entrainment in the temperature range 1023 to 1263 K and the free energy equation, ΔG0/J mol−1 = (95060 ± 2700) − (38.7 ± 2.4)T, was obtained. A free energy equation for the corresponding equilibrium, ZnS(c, sphalerite) + 2HCl(g) = ZnCl2(1) + H2S(g), was derived using ancillary thermodynamic data, ΔG0/J mol−1 = (−28340 ± 2800) + (85.6 ± 2.4)T, (638–978 K).

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Mass spectrometric and Knudsen-cell vaporization studies of group 2B-6B compounds

Cited by 301 publications

References 1 publication

Programmable Thermal Dissociation of Reactive Gaseous Mercury, a Potential Approach to Chemical Speciation: Results from a Field Study

Programmable Thermal Dissociation of Reactive Gaseous Mercury, a Potential Approach to Chemical Speciation: Results from a Field Study

High Temperature Thermodynamic Data for CdTe(c)

The thermodynamics of zinc sulphide transport in hydrogen chloride by modified entrainment

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