A laboratory-scale fixed-bed column is employed to study the dynamic behavior of the carbon molecular sieve MSC CT-350 for CO/CH separation. Breakthrough adsorption tests in single-component systems are carried out at different pressures (1, 3, 5, 6.5 and 8 bar) and constant temperature (20 °C). Moreover, an additional test is conducted with a 40% CO/60% CH binary mixture at 3 bar. Desorption tests are performed by varying the purge-to-feed ratio (P/F) at 50%, 30% and 20%, optionally using a vacuum pump. Experimental results show that MSC CT-350 has a good CO adsorption capacity for each pressure, considerably higher than CH. In the binary test, very slight differences are experimentally found in the adsorption kinetics and equilibrium adsorption capacity with respect to single-compound tests, which results equal to 2.16 mol kg for CO and 0.302 mol kg for CH at 3 bar, compared with 2.29 mol kg for CO and 0.262 mol kg for CH for the single-compoound counterparts. The time required for a complete regeneration decreases with the increase in purge flowrate and with the simultaneous use of the vacuum pump. Finally, CO adsorption is a reversible process as the CO adsorption capacity of the adsorbent is not significantly reduced when utilized in subsequent adsorption-desorption cycles.

中文翻译：

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揭示 MSC CT-350 在 CO2/CH4 分离方面的潜力，以优化沼气升级的变压吸附工艺

采用实验室规模的固定床柱研究碳分子筛 MSC CT-350 用于 CO/CH 分离的动态行为。单组分系统的突破性吸附测试在不同压力（1、3、5、6.5 和 8 bar）和恒温（20 °C）下进行。此外，还使用 ​​40% CO/60% CH 二元混合物在 3 bar 下进行了额外测试。通过将吹扫进料比 (P/F) 改变为 50%、30% 和 20%（可选地使用真空泵）来进行解吸测试。实验结果表明，MSC CT-350在各压力下均具有良好的CO吸附能力，明显高于CH。在二元测试中，实验发现相对于单一化合物测试，吸附动力学和平衡吸附容量存在非常微小的差异，结果在 3 bar 下，CO 为 2.16 mol kg，CH 为 0.302 mol kg，而 2.29 mol kg对于单一化合物对应物，CO 为 0.262 mol kg，CH 为 0.262 mol kg。完全再生所需的时间随着吹扫流量的增加以及真空泵的同时使用而减少。最后，CO 吸附是一个可逆过程，因为在随后的吸附-解吸循环中使用时，吸附剂的 CO 吸附能力不会显着降低。