Correlation Study of Pyrolysis Product between Two Different Thermal Simulation Systems

By taking pyrolysis experiments in closed and open systems,the relationship and evolution of hydrocarbon products for Nanning lignite have been studied.The results show that in the closed system,the temperature range that liquid hydrocarbon exists is from 250℃ to 600℃,and it is from 250℃ to 550℃ for the open system.By comparing production rate of hydrogen,gaseous hydrocarbons and liquid hydrocarbon,we discovered that liquid hydrocarbon is the major factor affecting polycondensation of organic matter.In the two systems,there is a negative correlation between the production rate of hydrogen and liquid hydrocarbon,gaseous hydrocarbons and liquid hydrocarbon.But the production rate of hydrogen and gaseous hydrocarbons has a positive correlation.This shows that organic evolution is a stable process affected by the bond energy of chemical bonds and not related with experimental methods and processes.In the high temperature stage,the production rate of gaseous hydrocarbons is almost equal under the open and closed systems.Therefore,when calculating the gas volume,the evolution degree should be taken into account in choosing gas production rate.