電漿催化技術應用於揮發性有機污染物之去除

Application of plasma catalysis for the removal of VOCs

潘冠綸(Kuan-Lun Pan) ； 張木彬(Moo-Been Chang) ； 吳信賢(Xin-Xian Wu)

《燃燒季刊》 106期 (2019/08) Pp. 45-60

https://doi.org/10.30041/CQ.201908_(106).0004

摘要

本文旨在探討perovskite-type觸媒結合非熱電漿去除VOCs之效能，首先評估不同perovskite-type觸媒對VOCs去除之活性，結果顯示perovskite-type觸媒經改質後對VOCs去除之活性可獲得顯著改善，原因為perovskite-type觸媒經改質後，可提升觸媒的晶格氧比例，進一步使觸媒有較高的氧移動性，以利VOCs之氧化反應。另外，H_2-TPR結果亦顯示改質之perovskite-type觸媒不僅有較好還原特性，且觸媒表面具有豐富氧化態，有助觸媒於VOCs去除之氧化還原反應。將改質之perovskite-type觸媒與非熱電漿結合進行VOCs之去除測試，結果顯示當perovskite-type觸媒填充於電漿系統時，VOCs去除效率及礦化率皆可獲得提升，推測原因為plasma catalysis系統內存在顯著協同效應（synergistic effect）。副產物分析結果顯示plasma catalysis系統應用於在VOCs之去除，亦可有效降低O_3及NO_x濃度。整體而言，plasma catalysis具潛力應用於實場。

關鍵字

揮發性有機汙泥 ； 催化 ； 非熱電漿 ； 電漿

並列摘要

This study aims to evaluate performance of plasma catalysis (combining perovskite-type catalyst with nonthermal plasma) for VOCs removal. First, various perovskite-type catalysts were applied for VOCs removal, and results indicated that activity of perovskite-type catalysts could be improved significantly after modification. The analysis of catalyst surface indicated that modified perovskites have good mobility of oxygen due to high lattice oxygen ratio which can promote VOCs oxidation reaction. In addition, H_2-TPR result indicated that modified perovskites possess better reducibility and more variation of oxidation state, resulting in higher VOCs removal. Further, modified perovskites were combined with nonthermal plasma to form various plasma catalysis systems for VOCs removal. Results indicated that VOCs removal efficiency and CO_2 mineralization could be increased significantly as modified perovskites were introduced into plasma system. Possibly, plasma catalysis system exists synergistic effect which can increase performance of plasma-based system for VOCs removal. For analysis of byproducts, results indicated that concentrations of O_3 and NO_x can be reduced significantly as plasma catalysis was applied for VOCs removal. Overall, this study demonstrated that plasma catalysis has good potential to remove VOCs from gas streams for practical field.

並列關鍵字

Volatile organic compounds ； catalysis ； nonthermal plasma ； plasma catalysis