The traditional comprehensive utilization method of coal is

At present, the comprehensive utilization measures of coal mainly include coal gasification, coal liquefaction and coal coking; The main component of coal is carbon, and it also contains sulfur and nitrogen, so the incomplete combustion of coal will produce carbon monoxide, sulfur dioxide and nitrogen oxides, so the gas produced after coal combustion mainly contains three atmospheric pollutants: sulfur dioxide, nitrogen oxides and carbon monoxide.

So, the answer is: coal gasification; Liquefaction of coal; Coking of coal; Sulfur dioxide; Nitrogen oxides; Carbon monoxide.