Reactivity of coal in direct hydrogenation processes: Technical progress report, September-November 1986

Technical Report · Thu Jan 01 04:00:00 EST 1987

OSTI ID:7156621

Baldwin, R M; Miller, R L

Research during the past quarter has centered on two separate projects related to this program. First, the methodology and calculational procedures required to apply the Anthony-Howard non-isothermal distribution of activation energies technique to our coal liquefaction data was developed fully. A PC-based computer program was written which permits estimation of the A-H fitting parameters for mean activation energy, the distribution function, and preexponential factor. In general, the Anthony-Howard model was found to be superior to other kinetic models examined. A second project was started during the past quarter which was intended to re-examine one of the basic assumptions under which the program was being carried out. During the recent Principal Investigator's conference in Pittsburgh, several concerns were raised relative to solvent effects on the data and ultimate reactivity rankings being determined. The effect of solvent on relative reactivity measurements was re-examined focusing on liquefaction reactions of three coals of different ranks in 7 different solvents (1-methylnaphthalene, naphthalene, phenanthrene, water, dodecane, tetralin, and a blank). An ancillary study on hydrogenation of benzophenone in 6 different vehicles under hydrogen and helium gas atmospheres was also completed in order to examine hydrogen transfer and shuttling mechanisms under the same conditions being employed in the liquefaction experiments. The results of these studies prove conclusively that: (1) under the reaction conditions being used in this program, the vehicle (solvent) employed in determining the relative reactivity rankings within a group of coals has no effect on the resultant reactivity ranking and; (2) 1-methylnaphthalene is not acting as a hydrogen donor under conditions being employed for measurement of liquefaction reactivity data. 4 refs., 4 tabs.

• Research Organization: Colorado School of Mines, Golden (USA). Dept. of Chemical Engineering and Petroleum Refining
• DOE Contract Number: FG22-85PC80907
• OSTI ID: 7156621
• Report Number(s): DOE/PC/80907-T4; ON: DE87003999
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALKANES
ALKYLATED AROMATICS
AROMATICS
BENZOPHENONE
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL RANK
COMPARATIVE EVALUATIONS
CONDENSED AROMATICS
DATA
DODECANE
ELEMENTS
ENERGY
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN TRANSFER
HYDROGENATION
INFORMATION
KETONES
KINETICS
LIQUEFACTION
MATERIALS
METHYLNAPHTHALENES
NAPHTHALENE
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENANTHRENE
REACTION KINETICS
RESEARCH PROGRAMS
SOLVENT PROPERTIES
SOLVENTS
TETRALIN
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
WATER
YIELDS