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A study of ash deposits on the heat exchange tubes using SDT/MS and XRD techniques by Ying Xie; Wei Xie; Wei-Ping Pan; Alan Riga; Kiek Anderson is a Materials Science article available to read on EtoBox.

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Four ash samples which were deposited on four different locations in the atmospheric ̄uidized bed combustor, FBC, system at the TVA Shawnee Steam Plant near Paducah, KY, were employed in the present study. The SDT/MS and XRD techniques were applied to iden®ty the sample composition and the mechanism that form the deposits. The major compound in the deposits from convection pass inlet, superheater and multiclone inlet was CaSO 4 , and the predominant minor compound was CaO in the samples. Also, CaS was found in the deposits from superheater by XRD analysis. In the case of recycle feed pipes, Ca(OH) 2 and CaCO 3 were the major components, and CaSO 4 and CaO the predominant minor compound in the deposits. The combined SDT/MS with XRD results are useful techniques for identi®cation of unknown ash samples.

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Author

Ying Xie; Wei Xie; Wei-Ping Pan; Alan Riga; Kiek Anderson

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0040-6031)

Published

1998

Language

EN

Field

Materials Science (Physical Sciences)