MOLECULAR SIEVE CARBON MATERIAL FOR PURIFYING HYDROGEN

摘要

PURPOSE: To obtain a molecular sieve carbon material (MSC) for purifying hydrogen having a large bulk density and a high adsorption capacity of gaseous impurities per unit volume by controlling the size and the distribution of the micropore and the macropore of the active carbon material produced from coconut shell charcoal, having a prescribed specific surface area. ;CONSTITUTION: The active carbon material produced from coconut shell charcoal has a 350 to 700m²/g specific surface area. Also the volume of the micropore having a 0.6 to 0.7nm average diameter and a ≤1nm maximum diameter, the volume of the macropore having a ≥100nm diameter and the bulk density of this active carbon material are controlled to 0.20 to 0.40ml/g, 0.10 to 0.20 ml/g and 0. 60 to 0.80g/ml respectively to obtain the MSC for purifying hydrogen. The adsorption amount of gases such as CO, CO₂, CH₄, etc., per unit volume of this MSC is large. Therefore the amount of these gases which can be treated by this MSC is more than 1.5 times as large as that by the conventional MSC in the adsorption tower of the equal volume, and also high purity hydrogen can be produced at a high recovery rate.;COPYRIGHT: (C)1994,JPO&Japio