Decomposition of trichloromethane (chloroform, CHCl 3 ) has been studied in inductively coupled RF thermal plasma and in cold plasma, i.e. in silent electric discharge, in neutral and oxidative conditions, as well. GC-MS analysis of the gaseous products and the extracts of the soots were performed and resulted in the formation of solid soot, aliphatic dienes, cyclo-dienes and some aromatic compounds in neutral conditions of RF thermal plasma. In oxidative conditions, however, much less soot and dienes, and much more oxygen-containing products were formed as compared to neutral ones. In the cold plasma reactor, wide range of chlorinated ethane, ethene and propene derivatives were formed in neutral conditions. In oxidative conditions, formation of carbonyl compounds and carbon monoxide as intermediates took place, while the final product consisted of CO 2 , H 2 O and Cl 2 in the low temperature plasma reactor.

No abstract

No abstract

The reactions of hematite and wustite with C12, COC12, CO + C12 and gaseous CC14 were studied by thermogravimetry, X-ray diffraction and computer-assisted thermodynamic calculations. During the chlorination of hematite, only gaseous products were formed. The apparent activation energies were calculated from the isothermal TG curves. The chlorination of wustite involves the formation and transformation of a series of sofid chloride products. FeCl2(s), FeCla(s ) and FeOCl(s) were found as intermediates during chlorination with CI 2 or CI 2 + CO, while onlyFeClz(s) was detected in reactions with COCI: oe CC14. The chlorinations of the iron oxides with various agents were compared, and the differences in reactivity sequences were established.Chlorination is a useful tool for the processing of low-grade ores and can also be used for the removal of iron from raw materials. Because of its technical importance, the chlorination behaviour of hematite was investigated in some recent publications

No abstract