Measurements of mercury speciation and fine particle size distribution on combustion of China coal seams
作者： Lei Zhang , Michael Daukoru , Sarah Torkamani , Shuxiao Wang , Jiming Hao
DOI: 10.1016/J.FUEL.2012.06.069
关键词: Coal mining 、 Particle-size distribution 、 Chemistry 、 Energy value of coal 、 Combustor 、 Combustion 、 Flue gas 、 Coal 、 Mercury (element) 、 Mineralogy 、 Metallurgy
摘要: The percentage of mercury that is removed in currently used air pollution control devices (APCDs) depends on the speciation flue gas exhausting from coal combustor. Bench-scale measurements were carried out combustion different types a drop-tube furnace set-up to better understand formation process three species, i.e. Hg0, Hg2+ and Hgp, gaseous phase fine particles. It was observed due chemical reaction kinetics limitations, higher concentrations lead lower proportions. concentration chlorine has opposite effect, not as significantly though. With increasing, proportion increases. Combusting finer sized powders results more Hg2+. Mineral composition feed particle size great impact formation. Increased Al formation, while Fe increases larger coexistence Si can enhance coagulation process. This also enhanced at rates, when sizes are smaller. Results oxy-coal conventional compared.
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