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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.
π SIMILAR VOLUMES
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. ## 97102132 Correlations for the
Six Turkish lignites were treated with solutions of HCl or EtONa at ambient temperature or at 150Β°C. The proximate analysis, forms of sulfur, acidic functional groups and calcium contents of the raw and treated lignites were determined. The solutions after treatment were analysed for calcium. The ef