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为了从现有的国产碳分子筛产品获得适用于含氢气体净化(除去CO_2等杂质)的碳分子筛改性品种,研究了HNO_3处理和CO_2处理两种扩孔方法。通过液相尺码法测微孔体积和流动法测吸附分离系数及吸附等温线,考察了扩孔工艺条件对碳分子筛微孔结构和吸附分离性能的影响,确定了适宜的扩孔处理条件。对HNO_3扩孔的碳分子筛的动态吸附性能进行了初步考察,并与未扩孔的碳分子筛作了对比。实验结果表明,适宜条件下扩孔的碳分子筛可用于含H_2气体中CO_2的吸附分离。实验结果和结论还可供进一步研究扩孔碳分子筛对其它组分的吸附性能和生产部门制备用于含H_2气体净化的碳分子筛作参考。
In order to obtain carbon molecular sieve modified varieties suitable for purification of hydrogen-containing gas (removing impurities such as CO 2) from existing domestic carbon molecular sieve products, two reaming methods of HNO 3 treatment and CO 2 treatment were studied. The influence of reaming process conditions on the micropore structure and adsorption / separation performance of carbon molecular sieve was investigated by measuring the micropore volume and the flow rate method by liquid phase size method. The optimum conditions for reaming treatment were determined. The dynamic adsorption performance of HNO 3 reaming carbon molecular sieve was investigated and compared with that of uncarbonated carbon molecular sieve. The experimental results show that carbon molecular sieve expanded under suitable conditions can be used for the adsorption and separation of CO 2 in H 2 -containing gas. The experimental results and conclusions can also be used to further study the adsorption properties of other components by the expanded carbon molecular sieve and the carbon molecular sieve prepared by the production department for purifying H 2 -containing gas.