液相電漿結合觸媒去除水中異丙醇及產氫效率探討;Removal of isopropanol and generation of hydrogen via liquid-phase plasma combined with Ni/TiO2

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Title:	液相電漿結合觸媒去除水中異丙醇及產氫效率探討;Removal of isopropanol and generation of hydrogen via liquid-phase plasma combined with Ni/TiO2
Authors:	余泳潔;Yu, Yung-Jie
Contributors:	環境工程研究所
Keywords:	液相電漿;光觸媒;異丙醇;產氫;liquid-phase plasma;photocatalyst;isopropanol (IPA);hydrogen generation
Date:	2025-01-17
Issue Date:	2025-04-09 18:30:30 (UTC+8)
Publisher:	國立中央大學
Abstract:	隨著工業及科技產業發展，環境問題日益嚴重，高科技產業於製造過程需要使用大量的純水及有機溶劑，因此產生大量之有機廢水，其中半導體產業有機廢水常含有異丙醇（Isopropanol，簡稱IPA），IPA於工業及科技產業當中常作為清潔劑和消毒劑，因此揮發性有機化合物（VOCs）的排放引起越來越多的關注，因為它們對人類健康和環境造成不良影響。本研究通過實驗室規模的系統，製備Ni/TiO2之光觸媒並評估其與液相電漿結合以去除水中有機物的效果。使氬氣及氧氣通過質量流量計進入混合球再進入反應器中，生成含有氬氣及氧氣的氣泡。本研究以含浸法製備Ni/TiO2之光觸媒。實驗測試在室溫下觸媒結合液態電漿 (LPP) 之效應，而降解效率以COD檢測儀進行分析，產物則通過二氧化碳分析儀、氫氣分析儀及氣相層析儀/質譜儀進行分析。在液相電漿放電過程中，利用電漿-液體系統中豐富的活性物質，如•OH、O• 和H₂O₂ 降解IPA。針對不同的操作條件進行實驗，包括電漿功率、觸媒種類和濃度等參數的變化。結果顯示，在100 mg/L的IPA、150 μS/cm的導電度和pH值為11，使用Ar：O2＝1：1的條件下，5 wt% Ni/TiO2 觸媒結合液相電漿對IPA的去除率達93.9 ± 5.9%，同時檢測氫氣的生成速率為697± 65.4 μmol/h∙g，且在3,000 mg/L的IPA、150 μS/cm的導電度和pH值為11，使用純氬氣的條件下，氫氣的生成速率提升至2,437 ± 70.3 μmol/h∙g。本研究提供了一種能同時實現有機污染物去除和氫氣生成的方法。若能有效收集和利用產出的氫氣，將使此技術在市場上更具競爭力，並期待其在水處理中的應用進一步發展。;With the rapid development of industrial and technological sectors, environmental issues have become increasingly serious. High-tech industries consume large amounts of ultrapure water and organic solvents in their production processes, leading to significant discharge of organic wastewater. Wastewater from the semiconductor industry typically contains isopropanol (IPA), commonly used as a cleaning and disinfecting agent in industrial and technological applications. The emission of organic compounds has raised considerable public concern due to their harmful effects on human health and the environment. This study investigates the removal of IPA and hydrogen production efficiency using Ni/TiO2 photocatalysts combined with liquid-phase plasma (LPP) in a laboratory-scale experimental system. Argon and oxygen gases were introduced into the reactor through mass flow controllers to generate gas bubbles. The Ni/TiO2 photocatalysts were prepared via the impregnation method. Experimental tests were conducted at room temperature, and degradation efficiency was analyzed using a COD analyzer, while products were analyzed using a CO₂ analyzer, hydrogen analyzer, and gas chromatography-mass spectrometry (GC/MS). During the liquid-phase plasma discharge process, abundant reactive species such as •OH, O•, H• and H₂O₂ were generated in the plasma-liquid system, facilitating IPA degradation. Experimental tests were conducted under various operating conditions, including plasma power, catalyst type, and catalyst concentration. Results showed that under conditions of 100 mg/L IPA, 150 μS/cm conductivity, pH 11, and an Ar:O₂ ratio of 1:1, the combination of LPP with 5 wt% Ni/TiO2 achieved an IPA removal efficiency of 93.9 ± 5.9%, with a hydrogen production rate of 697 ± 65.4 μmol/h∙g. Furthermore, under conditions of 3,000 mg/L IPA, 150 μS/cm conductivity, pH 11, and pure argon gas, the hydrogen production rate increased to 2,437 ± 70.3 μmol/h∙g. Thus, this study proposes a method capable of simultaneously achieving organic pollutant removal and hydrogen generation. The hydrogen produced can enhance the competitiveness of this technology in the market and potential applications in wastewater treatment.
Appears in Collections:	[Graduate Institute of Environmental Engineering ] Electronic Thesis & Dissertation

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