Degree Type

Dissertation

Date of Award

1982

Degree Name

Doctor of Philosophy

Department

Chemistry

Abstract

A material balance study was performed using spark source mass spectrography on Iowa and Colorado coal burned at the Iowa State University Power Plant. Sixty-two elements were analyzed in the influent coal, effluent bottom ash, fly ash from a primary dust collector, and fly ash from an electrostatic precipitator. The material balance was satisfactory for the majority of the elements;A computer application of the Franzen-Maurer-Schuy formula was developed to calibrate the photoplates. The results indicated an unexpected increase in the sensitivity of the emulsion due to increasing momentum of the ions;The suitability of three internal standards, Cu, Zr, and Ba, was examined for use in the material balance study. The relative sensitivity coefficients for the elements in low-temperature ashed coal and the effluent ashes were determined from the results of the analysis of twelve standard samples. The results of the analysis of ashed coal and other ashes by spark source mass spectrography were improved when line areas instead of peaks were measured, the mass spectral data were interpreted by computer methods, and an accurate calibration and computation scheme was developed;The enrichment of the elements in the effluent ashes wasexamined to determine the potential of these ashes as sources;of some of these elements;('1)DOE Report IS-T-990. This work was performed under ContractNo. W-7405-eng-82 with the Department of Energy.

DOI

https://doi.org/10.31274/rtd-180813-6325

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Tim David Welcomer

Language

en

Proquest ID

AAI8221234

File Format

application/pdf

File Size

111 pages

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