Petroleum coke is a black solid coke produced by cracking and coking heavy oil (mainly residual oil) at a high temperature of 490-510℃ by a delayed coking device. "Moyuan petroleum coke is mainly sponge coke, with a production capacity of 600,000 tons/year, which is widely used in the fields of electrolytic aluminum and new energy anode materials, among others.

The chemical formula is (NH₄)₂SO₄, and the nitrogen content is about 21%. It is an excellent raw material for nitrogen fertilizer, and also the earliest nitrogen fertilizer produced and used in China. The industrial ammonium sulfate is white or yellowish crystals, whose physical properties are relatively stable.