活性炭改性及其对CO_2/CH_4吸附性能的研究

Study of the modifying of activated carbon and its adsorption properties of CO_2/CH_4 mixture

以活性炭为基础吸附剂,考察不同类型活性炭的吸附性能以及酸碱改性及氧化性改性对活性炭CO2/CH4吸附性能的影响。CO2/CH4的吸附性能通过变压吸附装置所得的穿透曲线评价。结果表明:煤质活性炭对CO2/CH4的吸附分离效果最好;对于改性活性炭,质量分数为5%双氧水、5%氨水及5%盐酸改性对活性炭的吸附容量均具有较大的提高,其中双氧水及氨水改性活性炭的CO2/CH4分离因子也有明显的提高。

Activated carbon was used as a basic adsorbent.Different kinds of activated carbon,diverse acid-base modifying were employed to find an activated carbon which had well adsorbed properties.The adsorption properties were evaluated by breakthrough curves which were measured by an dynamic adsorption equipment.The results show that the coal-based activated carbon is better than the other varieties of activated carbons;the activated carbons which are modified by aqua ammonia,hydrogen peroxide and hydrochloric acid have big adsorption capacities.The CO2/CH4 separation factors of aqua ammonia and hydrogen peroxide modified activated carbons are raised evidently.