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采用重量法在电子天平上研究了C2H4和O2单组份在5A、13X、丝光沸石和碳分子筛等不同吸附剂上的吸附平衡性质和扩散动力学性质。结果表明,在沸石类吸附剂上,C2H4的平衡吸附量远大于O2的平衡吸附量,C2H4的吸附扩散速率也大于O2的扩散速率;在碳分子筛吸附剂上C2H4的平衡吸附量大于O2的平衡吸附量,但O2的吸附扩散速率远大于C2H4的扩散速率,其扩散系数是C2H4的239倍。单柱评价结果表明,C2H4-O2混合组份通过该碳分子筛吸附剂时,O2的破点时间长,C2H4的纯度可达100%。加压有利于选择吸附O2,而且加压吸附、常压脱附再生性能好。该碳分子筛是脱除高浓度乙烯中少量氧气的理想吸附剂。
Gravimetric method was used to study the adsorption equilibrium and diffusion kinetics of C2H4 and O2 single component on different adsorbents such as 5A, 13X, mordenite and carbon molecular sieve. The results show that the equilibrium adsorption capacity of C2H4 is far greater than that of O2 and the adsorption diffusion rate of C2H4 is greater than the diffusion rate of O2 on the zeolitic adsorbent. The equilibrium adsorption capacity of C2H4 on carbon molecular sieve adsorbent is greater than that of O2 Adsorption capacity, but the adsorption of O2 diffusion rate is much larger than the C2H4 diffusion rate, the diffusion coefficient is 239 times C2H4. The results of single column evaluation show that when C2H4-O2 mixed component passes through the carbon molecular sieve adsorbent, the breaking point of O2 is long and the purity of C2H4 can reach 100%. Pressure is conducive to the choice of adsorption of O2, and pressure adsorption, atmospheric desorption regeneration performance. The carbon molecular sieve is to remove high concentrations of ethylene in a small amount of oxygen ideal adsorbent.