Study of carbon molecular sieve fibres by atmospheric TPD-MS of H2O, CO and CO2

摘要: High-resolution temperature-programmed desorption mass spectrometry (TPD-MS) with a supersonic molecular beams (SMB) inlet system enables us to analyse quantitatively CO, CO2 and water from various sites on carbon sieve fibres (CMSF). Three up 350 °C are observed. The first main site is of physically adsorbed molecules the surface oxides inside micropores. other two result dehydration decomposition oxides. effects relative humidity, oxide concentration pore structure adsorption CMSF studied. Gradual group at low temperature, 250 °C, monitored kinetics formation in air room temperature