Graduate Institute of Environmental Engineering, National Central University, No. 300, Jhongda Road, Jhongli District, Taoyuan City, 32001, Taiwan.
Environ Sci Pollut Res Int. 2019 May;26(13):12948-12962. doi: 10.1007/s11356-019-04714-0. Epub 2019 Mar 20.
Various perovskite-type catalysts including LaCoMnO, LaCoO, and LaMnO are first evaluated for the activities toward CH removal. Experimental results indicate that double-type LaCoMnO shows better activity if compared with single perovskites due to high lattice oxygen content and good reducibility. Subsequently, perovskite catalysts are combined with plasma (NTP) to form in-plasma catalysis (IPC) and post-plasma catalysis (PPC) systems. The results indicate that IPC systems have better higher performance than that of NTP-alone and PPC. Especially, high CH conversion (100%) and mineralization efficiency (96.8%) can be achieved with the applied voltage of 18 kV and temperature of 120 °C when LaCoMnO is integrated with NTP to form IPC system. Also, it owns the highest energy efficiency (0.14 g/kWh). It is concluded that IPC performance for CH removal is closely related with the properties of catalyst surface. In addition, the kinetics of IPC systems are investigated by a simplified model, and the result indicates that IPC with LaCoMnO as catalyst has a higher overall energy constant. This study reveals that double-type LaCoMnO is of higher activity than single perovskites for CH removal, and demonstrates that double-type LaCoMnO is of high potential to form plasma catalysis system for VOCs removal.
各种钙钛矿型催化剂，包括 LaCoMnO、LaCoO 和 LaMnO，首先被评估用于 CH 去除的活性。实验结果表明，与单钙钛矿相比，双钙钛矿型 LaCoMnO 由于具有较高的晶格氧含量和良好的还原性，表现出更好的活性。随后，将钙钛矿催化剂与等离子体（NTP）结合，形成等离子体催化（IPC）和等离子体后催化（PPC）系统。结果表明，IPC 系统的性能优于单独的 NTP 和 PPC。特别是，当 LaCoMnO 与 NTP 结合形成 IPC 系统时，在 18 kV 的应用电压和 120°C 的温度下，可实现高达 100%的 CH 转化率和 96.8%的矿化效率。此外，它还具有最高的能量效率（0.14 g/kWh）。研究结果表明，IPC 用于 CH 去除的性能与催化剂表面的性质密切相关。此外，通过简化模型研究了 IPC 系统的动力学，结果表明，以 LaCoMnO 为催化剂的 IPC 具有更高的总能量常数。本研究表明，双钙钛矿型 LaCoMnO 比单钙钛矿更适合 CH 去除，并且证明双钙钛矿型 LaCoMnO 具有形成用于 VOCs 去除的等离子体催化系统的高潜力。
