skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Analyzing organic sulfur in coal/char: Integrated mild gasification/XANES methods. Technical report, 1 March--31 May 1994

Abstract

The overall goal of this study is to improve the understanding of sulfur in coals/chars via the use of combined advanced non-destructive and advanced destructive methods of sulfur analysis. This study combines selective oxidation, analytical pyrolysis, and sulfur X-ray Absorption Near Edge Structure Spectroscopy (XANES) analysis. Samples with a wide variety of sulfur contents, (0.63% to 4.40%) have been prepared for use in this study. This includes steam gasification chars, oxidized coals and desulfurized coals as well of the original unaltered coals. Mild pyrolysis and preliminary XANES data shows that the sulfur chemistry of gasification chars is significantly different from that of the original coals. Mild pyrolysis of the samples that were oxidized with peroxyacetic acid showed that the level of simple thiophene structures observed in the pyrolysis products declines with increasing levels of oxidation. Sulfur XANES spectra of treated samples showed various effects depending on the treatment severity. For the less severely treated samples (demineralization and solvent extraction), the XANES spectra were similar, although not identical, to the untreated coal spectra, whereas the more severe treatments (steam at 450 C; peroxyacetic acid at 25 C) showed preferential oxidation of one or more sulfur-bearing phases in the original coal. Additionalmore » samples have recently been examined by XANES and W-band EPR and the data is currently being processed and evaluated.« less

Authors:
 [1];  [2]
  1. Southern Illinois Univ., Carbondale, IL (United States). Dept. of Mechanical Engineering and Energy Processes
  2. Kentucky Univ., Lexington, KY (United States)
Publication Date:
Research Org.:
Illinois State Geological Survey, Champaign, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10183105
Report Number(s):
DOE/PC/92521-T170
ON: DE94018866; BR: AV0100000/AV0102000; TRN: AHC29421%%32
DOE Contract Number:  
FC22-92PC92521
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: [1994]
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; BITUMINOUS COAL; CHEMICAL ANALYSIS; CHARS; COAL GASIFICATION; CHEMICAL REACTION KINETICS; ORGANIC SULFUR COMPOUNDS; PHASE TRANSFORMATIONS; PROGRESS REPORT; X-RAY SPECTROSCOPY; ABSORPTION SPECTROSCOPY; ILLINOIS BASIN; SAMPLE PREPARATION; EXPERIMENTAL DATA; 010404; 010600; GASIFICATION; PROPERTIES AND COMPOSITION

Citation Formats

Palmer, S.R., and Huffman, G.P.. Analyzing organic sulfur in coal/char: Integrated mild gasification/XANES methods. Technical report, 1 March--31 May 1994. United States: N. p., 1994. Web. doi:10.2172/10183105.
Palmer, S.R., & Huffman, G.P.. Analyzing organic sulfur in coal/char: Integrated mild gasification/XANES methods. Technical report, 1 March--31 May 1994. United States. doi:10.2172/10183105.
Palmer, S.R., and Huffman, G.P.. Thu . "Analyzing organic sulfur in coal/char: Integrated mild gasification/XANES methods. Technical report, 1 March--31 May 1994". United States. doi:10.2172/10183105. https://www.osti.gov/servlets/purl/10183105.
@article{osti_10183105,
title = {Analyzing organic sulfur in coal/char: Integrated mild gasification/XANES methods. Technical report, 1 March--31 May 1994},
author = {Palmer, S.R. and Huffman, G.P.},
abstractNote = {The overall goal of this study is to improve the understanding of sulfur in coals/chars via the use of combined advanced non-destructive and advanced destructive methods of sulfur analysis. This study combines selective oxidation, analytical pyrolysis, and sulfur X-ray Absorption Near Edge Structure Spectroscopy (XANES) analysis. Samples with a wide variety of sulfur contents, (0.63% to 4.40%) have been prepared for use in this study. This includes steam gasification chars, oxidized coals and desulfurized coals as well of the original unaltered coals. Mild pyrolysis and preliminary XANES data shows that the sulfur chemistry of gasification chars is significantly different from that of the original coals. Mild pyrolysis of the samples that were oxidized with peroxyacetic acid showed that the level of simple thiophene structures observed in the pyrolysis products declines with increasing levels of oxidation. Sulfur XANES spectra of treated samples showed various effects depending on the treatment severity. For the less severely treated samples (demineralization and solvent extraction), the XANES spectra were similar, although not identical, to the untreated coal spectra, whereas the more severe treatments (steam at 450 C; peroxyacetic acid at 25 C) showed preferential oxidation of one or more sulfur-bearing phases in the original coal. Additional samples have recently been examined by XANES and W-band EPR and the data is currently being processed and evaluated.},
doi = {10.2172/10183105},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {9}
}