工業革命以來，人類活動產生之二氧化碳排放量急劇增加，加劇全球暖化問題。碳捕集、利用與封存(Carbon Capture, Utilization and Storage, CCUS)技術為減碳的重要途徑，其中二氧化碳與甲烷共轉化的碳再利用技術也成為研究重點。本研究旨在結合非熱電漿技術與雙金屬觸媒，同時轉化甲烷與二氧化碳為液態產物。利用含浸法製備CuNi/γ-Al2O3、FeNi/γ-Al2O3與CuFe/γ-Al2O3三種雙金屬觸媒，總金屬負載量為10 wt%，結合非熱電漿反應系統，探討不同操作參數對CO2/CH4轉化效率與產物分布的影響。研究結果顯示，電漿觸媒技術可有效將二氧化碳與甲烷轉化為液態產物，最佳操作條件為進氣流量50 mL/min、CO2/CH4比例1:1、放電頻率18.5 kHz。於操作電壓12.5 kV下，單純電漿系統的總液態產物選擇性達57.7%，而結合雙金屬觸媒後，轉化效率顯著提升。其中FeNi/γ-Al2O3觸媒在16.5 kV下表現最高之甲烷與二氧化碳轉化率，分別是54.6%與51.2%，同時能量效率達0.42 mmol/kJ，較單純電漿系統提升50%，於12.5 kV時總液態產物選擇性最高(59.4%)。液態產物以甲醇、乙酸為主，並含少量乙醇。調節操作電壓可有效控制產物分布，低操作電壓條件下有利於甲醇生成，高操作電壓則促進乙酸形成。透過觸媒特性分析，確認金屬氧化物成功負載於γ-Al2O3載體表面，並具有良好的分散性。Cu2+位點主要促進醇類產物形成，Fe3+作為烷類吸附的首選位點，Ni位點則強化甲烷活化能力。本研究證明該技術可同時轉化二氧化碳與甲烷，對溫室氣體減量有重要貢獻，且所得液態產物可作為工業能源與化學品原料，深具發展潛力。;This study aims to combine non-thermal plasma technology with bimetallic catalysts to simultaneously convert CH4 and CO2 into liquid products. The research results show that plasma catalytic technology can effectively convert CO2 and CH4 into liquid products, with optimal operating conditions at 50 mL/min, CO2/CH4 ratio of 1:1, and 18.5 kHz. Under 12.5 kV , the plasma only system achieved a total liquid product selectivity of 57.7 %, while the conversion was significantly enhanced when combined with bimetallic catalysts. Among these, the FeNi/γ-Al2O3 demonstrated the highest methane and CO2 conversion at 16.5 kV, achieving 54.6 % and 51.2 % respectively, with an energy efficiency of 0.42 mmol/kJ. The highest total liquid product selectivity (59.4%) was achieved at 12.5 kV. The liquid products primarily consisted of methanol and acetic acid. Voltage regulation effectively controlled product distribution, with low voltage conditions favoring methanol formation and high voltage promoting acetic acid formation. Through catalyst characterization analysis, it was confirmed that metal oxides were successfully loaded onto the γ-Al2O3 surface with good dispersion. This study demonstrates that the technology can simultaneously convert CO2 and CH4, making important contributions to greenhouse gas reduction, and the resulting liquid products can serve as industrial energy and chemical feedstock materials, showing significant development potential.
