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

Title: SEM and EMA studies of an SRC pilot plant carbonaceous plug

Abstract

Scanning electron microscopy (SEM) and electron microprobe analyses (EMA) have proven to be extremely useful methods for analyzing microstructures observed in a carbonaceous ''plug'' retrieved from a feedline of a solvent refined coal (SRC) conversion plant. Typical petrographic micrographs revealed a semi-coke matrix enclosing nearly uniform sized minerals or mineral assemblages, as well as unaltered coal (fusinite) fragments. The identity of the minerals, by SEM and EMA, revealed two distinct mineral-types within the plug, namely minerals that have undergone transformations such as pyrite (FeS/sub 2/) ..-->.. pyrrhotite (FeS), and those minerals that are essentially unaltered; for example, quartz and kaolinite. The examination of porous areas within the semi-coke constituent showed a variety of solidified ''mesophase'' spherules either as individuals or as coalesced groups. These observations are significant in that they reveal the mechanism by which semi-coke forms; i.e., via spherical liquid crystals separating from the coal and solvent oil slurry. Additional structural features associated with the semi-coke were observed such as ridges along the pore walls composed of coalesced spheres in a chain-like growth.

Authors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab., Tenn. (USA)
Sponsoring Org.:
USDOE
OSTI Identifier:
6890164
Report Number(s):
CONF-780415-3
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Conference
Resource Relation:
Conference: Scanning electron microscopy conference, Los Angeles, CA, USA, 16 Apr 1978; Other Information: Portions of document are illegible
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CARBONACEOUS MATERIALS; ELECTRON MICROPROBE ANALYSIS; ELECTRON MICROSCOPY; SRC PROCESS; PLUGGING; COAL LIQUEFACTION PLANTS; DEPOSITS; KAOLINITE; MINERALS; PETROLOGY; PILOT PLANTS; PYRITE; QUARTZ; SEMICOKE; ALUMINIUM COMPOUNDS; ALUMINIUM SILICATES; CHALCOGENIDES; CHEMICAL ANALYSIS; FUNCTIONAL MODELS; GEOLOGY; INDUSTRIAL PLANTS; IRON COMPOUNDS; IRON SULFIDES; MICROANALYSIS; MICROSCOPY; ORES; OXIDES; OXYGEN COMPOUNDS; PYRITES; SILICATES; SILICON COMPOUNDS; SILICON OXIDES; SULFIDES; SULFUR COMPOUNDS; SULFUR ORES; TRANSITION ELEMENT COMPOUNDS; 010405* - Coal, Lignite, & Peat- Hydrogenation & Liquefaction

Citation Formats

Harris, L. A., and Yust, C. S. SEM and EMA studies of an SRC pilot plant carbonaceous plug. United States: N. p., 1978. Web.
Harris, L. A., & Yust, C. S. SEM and EMA studies of an SRC pilot plant carbonaceous plug. United States.
Harris, L. A., and Yust, C. S. Sun . "SEM and EMA studies of an SRC pilot plant carbonaceous plug". United States. https://www.osti.gov/servlets/purl/6890164.
@article{osti_6890164,
title = {SEM and EMA studies of an SRC pilot plant carbonaceous plug},
author = {Harris, L. A. and Yust, C. S.},
abstractNote = {Scanning electron microscopy (SEM) and electron microprobe analyses (EMA) have proven to be extremely useful methods for analyzing microstructures observed in a carbonaceous ''plug'' retrieved from a feedline of a solvent refined coal (SRC) conversion plant. Typical petrographic micrographs revealed a semi-coke matrix enclosing nearly uniform sized minerals or mineral assemblages, as well as unaltered coal (fusinite) fragments. The identity of the minerals, by SEM and EMA, revealed two distinct mineral-types within the plug, namely minerals that have undergone transformations such as pyrite (FeS/sub 2/) ..-->.. pyrrhotite (FeS), and those minerals that are essentially unaltered; for example, quartz and kaolinite. The examination of porous areas within the semi-coke constituent showed a variety of solidified ''mesophase'' spherules either as individuals or as coalesced groups. These observations are significant in that they reveal the mechanism by which semi-coke forms; i.e., via spherical liquid crystals separating from the coal and solvent oil slurry. Additional structural features associated with the semi-coke were observed such as ridges along the pore walls composed of coalesced spheres in a chain-like growth.},
doi = {},
url = {https://www.osti.gov/biblio/6890164}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: