Standard method of test for chlorine in coal. [Volumetric]

Journal Article · Wed Jan 01 04:00:00 EST 1975 · Annu. Book ASTM Stand.; (United States)

OSTI ID:7268185

Chlorine in coal is determined by oxidation of the sample by combustion and absorption of the contained chlorine by one of two methods. A weighed coal sample is mixed with Eschka mixture (2 parts by weight of light calcined MgO and 1 part of anhydrous Na/sub 2/CO/sub 3/ with both materials as free from chlorine as possible) and burned in a bomb containing O/sub 2/ under pressure with a small amount of (NH/sub 4/)/sub 2/CO/sub 3/ solution. Alternately, a weighed sample is mixed with Eschka mixture and heated at a specified temperature in an oxidizing atmosphere. The chlorides contained in the (NH/sub 4/)/sub 2/CO/sub 3/ solution from the bomb or extracted from the incinerated Eschka mixtures are determined by potentiometric titration by a modified Volhard procedure. The procedure of the duplicate determinations is +-0.03 percent. (BLM)

• OSTI ID: 7268185
• Journal Information: Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 26; ISSN ASTSA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHLORINE
COAL
COMBUSTION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALOGENS
NONMETALS
OXIDATION
POTENTIOMETRY
STANDARDS
TITRATION