The influence of thermal modification on lignite structure by FT-IR

The modification experiment of Inner Mongolia Baiyinhua lignite by hot air at 200 ℃ for 1 h was carried out. Thestructural changes before and after thermal were analyzed infrared spectrum. Theresults show that the moisture oxygen content in are greatly reduced modification, carboncontent calorific value also increased to varying degrees. In process variousoxygen-containing functional groups different degrees due decomposition. Thermalmodification causes substitution reaction aromatic hydrocarbons lignite, CH2 aliphatic hydrocarbonstructure breaks, but hydroxyl group does not change significantly modification.