Reactivity of young chars via energetic distribution measurements

Technical Report · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.2172/6128089· OSTI ID:6128089

Calo, J M; Zhang, L H; Rachel, W G; Lilly, W D

In this report, we present some preliminary work performed on the effect of inert'', diluent gases on the O{sub 2} and CO{sub 2} reactivities of chars, and the corresponding temperature programmed desorption spectra of the oxygen surface complexes. We also present some of the initial data obtained by operating the TPD reactor under vacuum. The following was accomplished during the reporting period: TPD spectra were obtained resin for resin and Wyodak coal char samples gasified in mixtures of various inert'', diluent gases and either O{sub 2} or CO{sub 2} as the oxidants. The effects of helium, argon, nitrogen, sulfur hexafluoride, and xenon diluent gases on reactivity were investigated. Although the diluent gas generally seemed to affect the reactivity, the expected trend in molecular weight was not clearly discernible. In view of these results, the reproducibility of the diluent/oxidant mixture compositions came under suspicion. As a result, we are now switching to pre-mixed gases for these types of studies. 13 refs., 8 figs., 2 tabs.

• Research Organization: Brown Univ., Providence, RI (United States). Div. of Engineering
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-90PC90307
• OSTI ID: 6128089
• Report Number(s): DOE/PC/90307-4; ON: DE92002758
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHARS
THERMODYNAMIC ACTIVITY
ARGON
CARBON DIOXIDE
CHEMICAL REACTORS
DESORPTION
HELIUM
NITROGEN
OXYGEN
PROGRESS REPORT
RESINS
SPECTRA
SUBBITUMINOUS COAL
SULFUR FLUORIDES
SURFACE PROPERTIES
XENON
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
DOCUMENT TYPES
ELEMENTS
ENERGY SOURCES
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
FOSSIL FUELS
FUELS
GASES
HALIDES
HALOGEN COMPOUNDS
MATERIALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
PYROLYSIS PRODUCTS
RARE GASES
SULFUR COMPOUNDS
010409* - Coal
Lignite
& Peat- Pyrolysis & Carbonization- (1987-)
010600 - Coal
Lignite
& Peat- Properties & Composition