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Title: Characterization of porosity via secondary reactions

Abstract

During the course of recent work applying temperature programmed desorption (TPD) to the determination of energetic distributions of oxygen complexes on the surfaces of oxidized coal chars, we discovered that secondary interactions occurring within the char structure during TPD produce characteristic features in the resultant spectra that appear to be quite sensitive to char porosity. The relative and absolute extents of these secondary interactions from the basis of a potential characterization technique. The use of such a method to characterize coal char porosity is potentially attractive because the requisite spectra can be obtained in a single TPD experiment -- a very facile experimental procedure. However, the unambiguous and quantitative interpretation of such data in terms of parameters that can be used to characterize coal char porosity still requires development and an improved understanding of the controlling phenomena. These issues define the primary focus of the current proposal.

Authors:
;
Publication Date:
Research Org.:
Brown Univ., Providence, RI (United States). Div. of Engineering
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
5601567
Report Number(s):
DOE/PC/91305-1
ON: DE92013026
DOE Contract Number:  
FG22-91PC91305
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CHARS; POROSITY; SURFACE AREA; CHEMICAL REACTION KINETICS; DESORPTION; MICROSTRUCTURE; OXYGEN COMPLEXES; PROGRESS REPORT; QUANTITATIVE CHEMICAL ANALYSIS; CHEMICAL ANALYSIS; COMPLEXES; CRYSTAL STRUCTURE; DOCUMENT TYPES; KINETICS; PYROLYSIS PRODUCTS; REACTION KINETICS; SURFACE PROPERTIES; 010600* - Coal, Lignite, & Peat- Properties & Composition; 400201 - Chemical & Physicochemical Properties

Citation Formats

Calo, J M, and Lilly, W D. Characterization of porosity via secondary reactions. United States: N. p., 1991. Web. doi:10.2172/5601567.
Calo, J M, & Lilly, W D. Characterization of porosity via secondary reactions. United States. https://doi.org/10.2172/5601567
Calo, J M, and Lilly, W D. 1991. "Characterization of porosity via secondary reactions". United States. https://doi.org/10.2172/5601567. https://www.osti.gov/servlets/purl/5601567.
@article{osti_5601567,
title = {Characterization of porosity via secondary reactions},
author = {Calo, J M and Lilly, W D},
abstractNote = {During the course of recent work applying temperature programmed desorption (TPD) to the determination of energetic distributions of oxygen complexes on the surfaces of oxidized coal chars, we discovered that secondary interactions occurring within the char structure during TPD produce characteristic features in the resultant spectra that appear to be quite sensitive to char porosity. The relative and absolute extents of these secondary interactions from the basis of a potential characterization technique. The use of such a method to characterize coal char porosity is potentially attractive because the requisite spectra can be obtained in a single TPD experiment -- a very facile experimental procedure. However, the unambiguous and quantitative interpretation of such data in terms of parameters that can be used to characterize coal char porosity still requires development and an improved understanding of the controlling phenomena. These issues define the primary focus of the current proposal.},
doi = {10.2172/5601567},
url = {https://www.osti.gov/biblio/5601567}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}