炭分子筛的表征

炭分子筛是浓缩煤层气变压吸附机组的关键材料,性能的好坏直接影响变压吸附机组的性能。通过在77 K下N2的吸脱附等温线对炭分子筛的比表面积、孔径分布进行测定,通过吸附试验对炭分子筛吸附N2,O2,CO2,CH4,H2的能力及N2和CH4在炭分子筛上的吸附速度进行比较,以确定不同炭分子筛分离气体的能力。 Carbon molecular sieve is the critical material of the enrichment CBM variable pressure absorption units,whose properties directly determine the function of the variable pressure absorption units.The specific surface area and pore size distribution of carbon molecular sieve is investigated according to analyzing N2 adsorption and desorption isotherms at 77 K.Compare the adsorption ability of carbon molecular sieve for N2,O2,CH4,H2 according to adsorption experiments.Adsorption rates of N2 and CH4 are analyzed,which make it easy for determining the separation ability of different carbon molecular sieve for gas