Sulfur smoke production with

Kerosene or sometimes referred to as Fuel Oil 1 is a refined petroleum distillate. Kerosenes usually have flash points within the range of 37.8 °C to 54.4 °C (100 °F to 130 °F). Therefore unless heated, kerosene will usually not produce ignitable mixtures over its surface. In atmospheric burning smoke production normally occurs. It is commonly used as a fuel and a solvent. In some applications it is treated with sulfuric acid to reduce the content of aromatics, which bum with a smoky flame. 

The problems with the combustion reaction occur because the process also produces many other products, most of which are termed air pollutants. These can be carbon monoxide, carbon dioxide, oxides of sulfur, oxides of nitrogen, smoke, fly ash, metals, metal oxides, metal salts, aldehydes, ketones, acids, polynuclear hydrocarbons, and many others. Only in the past few decades have combustion engineers become concerned about... 

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