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Design of a small particle sampling system. Progress report

Author
Chu, C. J.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Fredin, L., Hauge, R. H., and Margrave, J. L.

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Summary
The objective of present studies is the identification of gaseous species resulting from the rapid pyrolysis of small coal particles in vacuum and in the presence of reactive gases. Emphasis is placed on the early steps of coal gasification where highly reactive gas phase intermediate species can be observed by rapidly heating the coal to reaction temperature and then trapping the gaseous products with an inert gas on a cold (15K) surface. Identification and characterization of these gaseous species and possibly free radicals are performed using matrix isolation FTIR and high resolution mass spectroscopy, therefore, only a small amount of sample is required. In order to achieve this small sampling requirement, it became necessary to develop a flexible small particle sampling system. The following presents an account of the coal sampling systems we have developed during the course of our studies. Initial coal sampling apparatus designs as well as a more extensive discussion on our final design which meets all of our sampling requirements will be described. The final, microgram transient pulsed flow, small particle coal sampling system has proved to be a very useful means of metering small amounts of coal of a known particle size and weight into a reactor. It may also be of use to other investigations with a need to repeatably and reproducibly inject a known small amount of a solid sample into a reactor. 1 reference, 4 figures, 2 tables.
Report Numbers
DE85005908; DOE/PC/40792-T4
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: FG22-81PC40792
OSTI Identifier 6051590
Research organization: Rice Univ., Houston, TX (USA). Dept. of Chemistry.
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