Abstract This work explored the use of a zeolite molecular sieve as adsorbent material in the separation of effluent gases from an oxidative coupling of methane (OCM) process. The molecular sieve granules were synthesized, characterized, and evaluated as adsorbent material at the mini-plant scale. Dynamic adsorption experiments were performed at different feed temperatures (298, 308, 328 K), with pure and mixed gases (ethylene, ethane, oxygen, nitrogen and carbon dioxide), and at different absolute pressures (2 and 6 bar). The breakthrough curves and the corresponding dynamic temperature profiles from the adsorption system were obtained under the different experimental conditions. According to results pressure swing adsorption can be used as a de-methanizing alternative during the OCM downstream separation, and even as an ethane/ethylene separation alternative. The adsorption capacities for the different gases, per unit mass of adsorbent, at 303 K and 5 bar were: 0.138 kgCO2/kg, 0.094 kg C2H4/kg, 0.082 kgC2H6/kg, and 0.020 kgCH4/kg. A model of the process was implemented within Aspen Adsorption® software, and the transport parameters were adjusted to fit experimental observations. The computer model agreed with experimental results, and it can be used for further process up-scaling and techno-economic evaluation.

中文翻译：

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甲烷废气氧化耦合的吸附分离。小型工厂规模实验和建模

摘要 这项工作探索了使用沸石分子筛作为吸附材料在甲烷氧化偶联 (OCM) 过程中分离废气中的应用。分子筛颗粒被合成、表征和评估为小型工厂规模的吸附材料。动态吸附实验在不同的进料温度（298、308、328 K）、纯气体和混合气体（乙烯、乙烷、氧气、氮气和二氧化碳）以及不同的绝对压力（2 和 6 巴）下进行。在不同的实验条件下获得了吸附系统的穿透曲线和相应的动态温度曲线。根据结果​​，变压吸附可用作 OCM 下游分离过程中的脱甲烷替代方案，甚至作为乙烷/乙烯分离的替代品。在 303 K 和 5 bar 条件下，每单位质量吸附剂对不同气体的吸附容量为：0.138 kgCO2/kg、0.094 kg C2H4/kg、0.082 kgC2H6/kg 和 0.020 kgCH4/kg。在 Aspen Adsorption® 软件中实现了该过程的模型，并调整了传输参数以适应实验观察。计算机模型与实验结果一致，可用于进一步的工艺升级和技术经济评价。