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Effect of Coal Properties on HCN and NH 3 Release During Coal Pyrolysis

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The formation of HCN and NH 3 from fuel nitrogen during pyrolysis was studied in a prefilled reactor system with slow (temperature-programmed) heating and in a drop-in reactor system with a rapid heating rate. The experimental results indicate that the formation of HCN and NH 3 is obviously affected by coal properties. The effects of these coal properties vary with the heating fashion. Coal rank, characteristic of char residue, surface characteristics, and composition of the coal are important factors influencing the formation of HCN and NH 3 during pyrolysis.
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Keywords: HCN; NH 3; NO x precursors; coal; properties; pyrolysis

Document Type: Research Article

Affiliations: Key Laboratory of Coal Science and Technology Taiyuan University of Technology Ministry of Education and Shanxi Province Taiyuan, Shanxi, P.R. China

Publication date: November 1, 2005

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