Hydrothermal pretreatment of coal

Technical Report · Tue Aug 14 00:00:00 EDT 1990

DOI:https://doi.org/10.2172/6501742· OSTI ID:6501742

Loo, Bock; Ross, D S

We are examining the effects on composition and behavior of Argonne-supplied Wyodak coal under both thermal (no added water/N{sub 2}) and hydrothermal (liquid water/N{sub 2}) conditions at 350{degree}C for periods of 30 min and 5 hr, with emphasis during this period on the longer treatment. Field ionization mass spectrometry (FIMS) of the untreated, thermally treated, and hydrothermally treated coals is conducted at conditions where the samples are heated from ambient to 500{degree}C at 2.5{degree}/min. In the 5 hr work the volatilities of the coals are 24%, 16%, and 25% respectively. Solvent swelling studies with the recovered coals do not demonstrate the expected lower degree of crosslinking in the hydrothermal case. Both the thermal and hydrothermal treatments yield products with a decreased swelling ratio, but the ratio for the product from the aqueous treatment is slightly lower than that from thermal treatment. At present we cannot reconcile this result with our other data. 4 refs., 6 figs.

• Research Organization: SRI International, Menlo Park, CA (USA). Organic and Inorganic Chemistry Dept.
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC22-89PC89880
• OSTI ID: 6501742
• Report Number(s): DOE/PC/89880-T1; SRI-8209-9; ON: DE91002604
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
HEAT TREATMENTS
CHEMICAL COMPOSITION
HIGH TEMPERATURE
MOLECULAR WEIGHT
NITROGEN
PROGRESS REPORT
SWELLING
TEMPERATURE EFFECTS
VOLATILITY
WATER REMOVAL
CARBONACEOUS MATERIALS
DOCUMENT TYPES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
NONMETALS
REMOVAL
010600* - Coal
Lignite
& Peat- Properties & Composition