【摘要】 以煤为原料,通过气相碳沉积法制备了CH4/N2变压吸附分离用碳分子筛,研究了苯沉积量对碳分子筛吸附性能的影响。用液氮吸附(77 K)、扫描电镜对碳分子筛孔结构及表面形貌进行了表征,结果表明:制备的碳分子筛(CMS-1)平衡分离系数大于5,比表面积SBET=251.5 m2/g,微孔孔容Vm=0.1178 mL/g,孔径主要分布在0.35~2 nm,能满足CH4/N2变压吸附分离要求。更多还原

【Abstract】 Take coal as raw material to produce carbon molecular sieves with the method of vapor carbon deposition,which is used to concentrate methane from CH4/N2 mixtures.The effect of benzene deposition amount on the adsorption properties was studied.The pore structure of carbon molecular sieves was characterized by liquid nitrogen adsorption method(77 K).Environmental scanning electron microscopy(ESEM) was used to observe the surface morphology.The experimental results show that equilibrium separation factor of CMS-1 is greater than five,CMS-1 can meet the CH4/N2 PSA separation requirement,its BET specific surface area is 251.5 m2/g,the micro pore volume is 0.1178 cm3/g and its pore diameter size distributes mostly from 0.35 nm to 2.00 nm.更多还原