Gas-phase mercury conversion in h 2, o 2, chloro c 1-hydrocarbon, and no x combustion effluent from use of an elementary kinetic mechanism

Document Type

Article

Publication Date

12-1-2010

Abstract

Emissions of gaseous mercury from combustion sources and their control are a major environmental concern facing power generators. The removal of mercury by conversion to mercury halides is evaluated by use of an elementary reaction mechanism that is developed from fundamental principles of thermodynamics and statistical mechanics. Thermochemical properties have been calculated for needed reaction intermediates using CBS-QB3 and density functional methods, and kinetics are from evaluated literature and calculations. An elementary reaction mechanism has been constructed with quantum Rice-Ramsperger-Kassel analysis for chemical activation, and dissociation reactions with Master Equation for fall off. Comparisons of mercury loss versus halogen, hydrocarbon, H 2, H 2O, O 2, CH 4, and NO x presence in a typical combustion effluent stream are performed. Results illustrate significant effects of H 2 on the formation of HgCl 2, and competing effects Of NO x species with Hg for the halides. [Supplementary materials are available for this article. Go to the publisher's online edition of Combustion Science and Technology for the following free supplemental resource: a listing of rate constants at different pressures for association, addition, and insertion (chemical activation) and dissociation reactions for mercury species, plus lists of thermochemical properties and rate constants for each detailed mechanism subreaction set.] © Taylor & Francis Group, LLC.

Identifier

78751518228 (Scopus)

Publication Title

Combustion Science and Technology

External Full Text Location

https://doi.org/10.1080/00102200903463233

e-ISSN

1563521X

ISSN

00102202

First Page

529

Last Page

543

Issue

7

Volume

182

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