The importance of diphenylmethane-like structural units in an Argonne premium coal sample

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:6851231

Chambers, Jr, R R; Hagaman, E W; Woody, M C

Our approach for characterizing the acidic C-H bonds in coal is to treat O-methyl coal with a series of indicator bases, BLi, followed by methylation with C-13,14 double labelled methyl iodide. By varying the identity of BLi, and thus the pK/sub a/ of the conjugate acid BH, it is possible to evaluate the number of C-H bonds as a function of pK/sub a/. The application of this approach to two bituminous coals, namely Illinois No. 6 hvCb and PSOC 1197 lvb, led to the discovery of a significant concentration of acidic C-H sites with 18.5 < pK/sub a/ less than or equal to 22 which was interpreted as evidence for fluorene-like structural units in coal. 13 refs., 1 tab.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6851231
• Report Number(s): CONF-880912-12; ON: TI88012484
• Resource Relation: Conference: 196. American Chemical Society national meeting, Los Angeles, CA, USA, 25 Sep 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
STRUCTURAL CHEMICAL ANALYSIS
CARBON 13
CARBON 14
CARBON 14 COMPOUNDS
CHEMICAL BONDS
IODIDES
LABELLED COMPOUNDS
LITHIUM COMPOUNDS
METHYLATION
PH VALUE
ALKALI METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON ISOTOPES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
IODINE COMPOUNDS
ISOTOPES
LIGHT NUCLEI
MATERIALS
NUCLEI
RADIOISOTOPES
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES
010600* - Coal
Lignite
&amp; Peat- Properties &amp; Composition