Homogeneous Mercury Oxidation under Simulated Flue Gas of Oxy-coal Combustion | Zendy

Achariya Suriyawong | Zendy; Pratim Biswas | Zendy

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Homogeneous Mercury Oxidation under Simulated Flue Gas of Oxy-coal Combustion

Author(s) -

Achariya Suriyawong,

Pratim Biswas

Publication year - 2013

Publication title -

engineering journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.246

H-Index - 20

ISSN - 0125-8281

DOI - 10.4186/ej.2013.17.4.35

Subject(s) - flue gas , homogeneous , mercury (programming language) , combustion , oxy fuel , coal combustion products , waste management , coal , environmental science , environmental chemistry , chemistry , materials science , engineering , computer science , thermodynamics , organic chemistry , physics , programming language

This study investigated the effects of oxy-coal combustion on Hg-oxidation by HCl using simulated flue gas. Experiments were conducted with different carrier gases that one might find in oxy-coal combustion and conventional coal combustion. The extents of Hg-oxidation in pure CO 2 , pure N 2 and air were also studied for comparison. Our experimental results demonstrated that CO 2 weakly assisted Hg-oxidation by HCl; however, its significance was outweighed by the presence of O 2 . For all carrier gases, the presence of NO or H 2 O inhibited Hg-oxidation. The inhibitory effects strongly depended on concentrations of NO, but not moisture content. The synergistic inhibitory effects were shown when both NO and H 2 O were present together. The extents of Hg-oxidation were not significantly different for O 2 -N 2 , O 2 -N 2 -CO 2 and O 2 -CO 2 gas mixtures for all conditions investigated in this study.

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