The invention discloses a
carbon offset method for
methane synthesis gas prepared from
dry distillation gas. The method is implemented through that a
carbonate carbon offset raw material with a mineral
powder particle size of less than or equal to 80 meshes is added into
retort coal and uniformly mixed, the obtained mixture is added into a
dry distillation furnace to heat, red heat furnace charges are cooled to
room temperature, the obtained product is sieved so as to obtain a
solid clean fuel, and produced CO2 and CO gases are directly fed into the
dry distillation gas to match with excess H2 gas, so that the
hydrogen-carbon ratio requirement for the synthesis of
synthetic oil is met, thereby achieving the purpose of
carbon offset. According to the method disclosed by the invention,
carbonate minerals are directly added into the
retort coal, and a carbon offset effect on dry
distillation gas is achieved by using CO2 and CO gases produced by
thermal decomposition, therefore, the method has the characteristics of rich
raw material sources, simple technological processes, equipment investment saving, low carbon offset cost, good economical efficiency and the like, and can be widely applied to the comprehensive utilization projects of high and medium temperature dry
distillation gas.