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yield of soot formed during laboratory isothermal pyrolysis of both benzene and coal tar at 1200' were practically the same. It was concluded that dispersion of soot formed during incomplete combustion depends mainly on temperature and feedstock pyrolysis process.
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the primary combustion zone were studied. NO, values ~200 mg/m' were achieved by air grading with NH3 addition, fuel grading with CH4, by fuel separation grading with pyrolysis gas won from the coal at low air ratios and long retention times.
The authors carried out catalytic hydrocracking of a residue from deasphalting a syn-crude, obtained by direct coal liquefaction of a subbituminous Spanish coal, at different temperatures and reaction times. Kinetic study of the cracking reaction has been performed. The viscosity, coke content, boil