Surface resistivity and the chemical composition of fly ash

Journal Article · Sat Feb 01 04:00:00 EST 1975 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1975.10470063· OSTI ID:7249037

Bickelhaupt, R E

Resistivity was determined for a group of well characterized ashes representing both eastern and western coals. Data were taken between 60 and 250/sup 0/C in an environment of air containing approximately 9 volume percent water. Chemical transference experiments were conducted for two ashes having substantially different chemical compositions. Chemical analyses of the transference specimens revealed a pronounced migration of alkali metal ions toward the negative electrode. It was observed that the surface resistivity was inversely proportional to the concentration of these ions and that the iron concentration influenced particularly the participation of potassium. Surface resistivity is sensitive to the chemical composition of fly ash because the alkali metals serve as charge carriers. The conduction mechanism is probably analogous to that of glass. This viewpoint is compatible with the usual empirical observations regarding the effect of certain parameters on resistivity; for example, the interaction between ash and the environment.

• Research Organization: Southern Research Inst., Birmingham, AL
• OSTI ID: 7249037
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 25:2; ISSN JPCAA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AEROSOL WASTES
ALKALI METALS
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
COAL
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY SOURCES
FLY ASH
FOSSIL FUELS
FUELS
METALS
PHYSICAL PROPERTIES
POTASSIUM
QUALITATIVE CHEMICAL ANALYSIS
WASTES