The adsorption of ethylene (C₂H₄) from a mixture simulating the products obtained during the oxidative coupling of CH₄ using a commercial molecular sieve (MOS) is investigated. A joint experimental and theoretical approach has been employed. The adsorbent's trapping capacity decreases at higher temperatures, while the breakpoint time drops when the inlet C₂H₄ concentration increases. The Dubinin-Radushkevich isotherm model can better describe the adsorption of C₂H₄ onto the MOS. Pore diffusion is the rate-determining step given that the Bangham's kinetic model was the more suitable for this adsorption process. Finally, the low activation energy obtained corroborates the predominance of physical adsorption.

中文翻译：

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使用分子筛对氧化偶联衍生的乙烯进行经济有效的吸附

研究了使用商业分子筛 (MOS)从模拟 CH ₄氧化偶联过程中获得的产物的混合物中吸附乙烯 (C ₂ H ₄ ) 。已采用联合实验和理论方法。吸附剂的捕集能力在较高温度下会降低，而当入口 C ₂ H ₄浓度增加时，断点时间会缩短。Dubinin-Radushkevich 等温线模型可以更好地描述 C ₂ H ₄的吸附到 MOS 上。鉴于 Bangham 的动力学模型更适合这种吸附过程，孔扩散是决定速率的步骤。最后，获得的低活化能证实了物理吸附的优势。