Efficiency of Thermal Management Using Phase-Change Material for Nonisothermal Adsorption Process
Efficiency of Thermal Management Using Phase-Change Material for Nonisothermal Adsorption Process
复制标题
使用相变材料进行非等温吸附过程的热管理效率
DOI：
10.1021/acs.iecr.0c02344
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发表时间：
2020
影响因子：
4.2
通讯作者：
Miyahara Minoru T.
中科院分区：
文献类型：
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作者：
Sakanaka Yuta;Hiraide Shotaro;Tanaka Hideki;Hiratsuka Tatsumasa;Kojima Natsuko;Yamane Yasuyuki;Miyahara Minoru T.
当前的能源问题推动了高通量分离工艺的发展，使用固体吸附剂作为蒸馏的替代方法。然而，由于近绝热操作，吸附热引起的温度升高会显著降低吸附性能，这是一个关键问题。在此，我们基于实验和理论研究的结合，讨论了在这种过程中使用相变材料（PCMs）的热管理。正丁烷吸附在含活性炭和PCM颗粒的填充床柱上的突破曲线测量证实了考虑PCM融合潜热的非等温吸附柱模型的有效性。然后，深入研究了熔融温度和质量分数对PCMs绝热吸附性能的影响。最后，我们提出了一个简单的热平衡方程，用于最大限度地提高色谱柱的吸附能力的PCMs的最佳质量分数。
Current energy issues have driven the development of high-throughput separation processes using solid adsorbents as an alternative to distillation. However, it is a crucial problem that the temperature increase due to adsorption heat significantly reduces the adsorption performance because of near adiabatic operations. Herein, we discuss thermal management using phase change materials (PCMs) in such processes based on a combination of experimental and theoretical studies. Breakthrough curve measurements forn-butane adsorption on a packed bed column containing activated carbon and PCM pellets confirm the validity of our nonisothermal adsorption column model that considers the latent heat of fusion of PCMs. Then, the effects of the melting temperature and weight fraction of PCMs on adsorption performance are thoroughly investigated for an adiabatic adsorption process. Finally, we propose a simple heat balance equation for the optimum weight fraction of PCMs that maximizes the adsorption capacity of the column.