Characteristics of American coals in relation to their conversion into clean energy fuels. Quarterly technical progress report, April-June 1978

Technical Report · Mon Jan 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/5443567· OSTI ID:5443567

Spackman, W.; Davis, A.; Walker, P. L.; Lovell, H. L.; Essenhigh, R. H.; Vastola, F. J.; Given, P. H.; Suhr, N. H.

The Penn State Coal Sample Bank was expanded to include four new samples from southwestern Pennsylvania and four from eastern Kentucky. A total of 69 coal samples and 487 selected printouts of coal data were provided to the coal research community. The effects of low temperature oxidation on reducing the agglomerating properties of caking coals are being studied. A DuPont 942 Thermomechanical analyzer has been shown to be a valuable tool for quantifying swelling and softening parameters. In addition, Thermogravimetric studies have shown that oxygen uptake can be followed both quantitatively and reproducibly. From combined TGA, -TMA studies we hope to be able to quantify the effects of preoxidation on the caking properties of coals. Experimental techniques are being developed to study the effect of active surface area of a char on its reactivity during gasification. The effect of preoxidation in air of a highly caking coal in the temperature range 180 to 250/sup 0/C on weight loss during pryolysis up to 1000/sup 0/C and reactivity of resultant chars to air have been investigated. Preoxidation has little or no effect on weight loss during pyrolysis. However, preoxidation markedly enhances char reactivity. Important aspects of the chemical and physical makeup of lignite coals are being characterized by x-ray diffraction of low-temperature ashes to determine the mineral content and composition of the coal. Reactivities of a series of chars produced at 800/sup 0/C from a lignitic coal containing different amounts of exchangeable calcium ions have been measured in 1 atm CO/sub 2/ at 760/sup 0/C. Char reactivity increases linearly with increase in the calcium content of the char.

• Research Organization: Pennsylvania State Univ., University Park (USA). Coal Research Section
• Sponsoring Organization: US Energy Research and Development Administration (ERDA)
• OSTI ID: 5443567
• Report Number(s): FE-2030-12
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ADSORPTION HEAT
AGGLOMERATION
ALKALINE EARTH METALS
CAKING POWER
CALCIUM
CARBONACEOUS MATERIALS
CATALYTIC EFFECTS
CHARS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
COAL
COHERENT SCATTERING
CRYOGENIC FLUIDS
DATA
DATA FORMS
DIFFRACTION
ELEMENTS
ENERGY SOURCES
ENTHALPY
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
GRAPHS
GRAVIMETRIC ANALYSIS
INFORMATION
KINETICS
METALS
MINERALS
NONMETALS
NORTH AMERICA
NUMERICAL DATA
OXIDATION
OXYGEN
PHYSICAL PROPERTIES
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SAMPLING
SCATTERING
SEPARATION PROCESSES
SORPTION
TABLES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMODYNAMIC PROPERTIES
USA
X-RAY DIFFRACTION