Study on Adsorption Characteristic of Coal to Nitrogen Based on Adsorption Potential Theory

Application of ASAP2020 instrument,adsorption charactereristics of nitrogen on YangQuan coal samples were studied at temperature of 77K. The e - ω adsorption characteristics curve is confirmed by the adsorption isotherm under that temperature. Ulteriorty, the some e - ω adsorption characteristics curve is obtained by both Langmuir monolayer adsorption model and BET multilayer adsorption model. It shows that e - ω adsorption characteristics curve is independent of the adsorption model. So bases on e - ω adsorption characteristics curve,we can confirm different temperiture's adsorption isotherm.