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Reduction in ash constituents by water washing, and also at specific pH values, was systematically studied for three low-rank coals. Acid treatment removed inorganic constituents if accompanied by efficient water washing; at elevated temperatures this can also reduce moisture. The ash components are present in the coal matrix and also as numerous aluminosilicates particles containing K, Na, Mg, Fe...
The widely employed catalytic chemical vapour deposition (CCVD) process which uses the xylene/ferrocene precursor solution has been scaled-up to a reactor volume of 16 L to produce large quantities of multi-walled carbon nanotubes (MWNTs). The purpose of scaling up the CCVD process was to establish parameters for successful production of high purity MWNTs and develop procedures to coat large substrate...
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