隨著全球 CO2 排放加速攀升，開發高效且具經濟可行性的碳捕集、利用與封存(Carbon Capture and Utilization ，CCU)技術已成為當務之急。傳統水相醇胺類淋洗塔製程面臨再生能耗巨大、溶劑易降解及設備佔地龐大等瓶頸。基於此，本研究開發新型無機鹼性非水相醇鹽溶劑系統，並結合中空纖維膜接觸器(Hollow Fiber Membrane Contactor ，HFMC)，建構一套具低能耗、原位資源化固定且高投資效益之連續流 CO2 捕捉製程。 本研究實證NaOH 溶液中引入乙醇作為助凝劑，能利用反溶劑結晶顯著降低產物溶解度，打破傳統水相吸收之熱力學飽和限制，促使捕集之碳組分自發性轉化為無水小蘇打(NaHCO3)固相析出。經 X-射線繞射( X-ray Diffraction ，XRD)鑑定，當乙醇濃度調控於 70%-80%時，固相晶相品質完整且無雜相偏移。 在連續流系統質傳效能橫向對比中，面對高操作負荷(30 g/L NaOH、氣流量5 L/min)，HFMC(VM = 700 mL)憑藉高度規則的微孔流道，實驗一開始即能達到接近100%的去除率，有效克服了傳統填料塔(VC = 88，622 mL)隨機潤濕之時間滯後與碳穿透失重瓶頸。經換算，膜接觸器之體積捕捉通量比達 0.1186 kg-CO2/(L-h)，達填料塔之 139.5 倍，實證其僅需傳統設備約 0.8% 的微小硬體容積即可實現極致製程強化。 最後，本研究基於工業級規模(煙道氣量200 Nm3/min)建立技術經濟性評估(Techno-Economic Analysis ，TEA)模型。本製程全量導入工業廢鹼使原料成本歸零，年產38，000噸產物小蘇打，每年可獲 2億5，934萬元之動態淨利潤。財務清算顯示，首年初始資本投入 1億2，864 萬元，靜態投資回收期僅需 0.5 年，投資報酬率(Return on Investment ， ROI)為200 %。本研究成功為CCU 技術走向環境與經濟效益兼具的綠色效益。;With the global acceleration of CO2 emissions， the development of highly efficient and economically viable carbon capture， utilization， and storage (Carbon Capture and Utilization ，CCU) technologies has become an imperative strategy. Traditional aqueous amine-based scrubbing tower processes are inherently limited by formidable energy penalties for regeneration， solvent degradation， and massive equipment footprints. To circumvent these engineering bottlenecks， this study developed a novel inorganic， alkaline， non-aqueous alkoxide solvent system integrated with a hollow fiber membrane contactor (Hollow Fiber Membrane Contactor ，HFMC) to construct a continuous-flow CO2 capture process characterized by low energy consumption， in-situ resource utilization， and high investment returns. This study demonstrates that introducing ethanol as a co-solvent into a NaOH solution triggers anti-solvent crystallization， which significantly suppresses product solubility. This mechanism successfully bypasses the thermodynamic saturation limitations of conventional aqueous absorption， driving the captured carbon components to spontaneously transform into anhydrous sodium bicarbonate (NaHCO3) solid precipitates. X-ray diffraction ，XRD characterization confirmed that adjusting the ethanol concentration within an optimal range of 70%-80% yields excellent crystalline quality without any secondary phase deviations. In a lateral performance comparison of continuous-flow mass transfer under an extreme operational load (30 g/L NaOH， gas flow rate of 5 L/min)， the HFMC (VM = 700 mL) exhibited an instantaneous dynamic response with zero time-lag due to its highly ordered microporous channels. This performance effectively overcomes the stochastic wetting time-lag and carbon breakthrough weight-loss bottlenecks characteristic of conventional packed towers (VC = -88，622 mL). Notably， the volumetric CO2 capture flux of the membrane contactor reached 0.1186 kg-CO2/L-h)， which is 139.5 times higher than that of the 3-tier packed towers， respectively. This substantiates that the membrane-based capture technology requires only approximately 0.8% of the hardware volume of conventional equipment to achieve ultimate process intensification. Finally， this study establishes a techno-economic analysis (TEA) model based on an industrial-scale scenario (flue gas flow rate of 200 Nm³/min). The process fully utilizes industrial waste alkaline solution， effectively reducing the raw material cost to zero， and produces 38，000 tons of sodium bicarbonate annually. The system generates an annual dynamic net profit of 259.3 million NTD. Financial evaluation shows that with an initial capital investment of 128.6 million NTD， the static payback period is only 0.5 years， and the Return on Investment (ROI) reaches 200%. This study demonstrates that CCU technology can achieve both environmental and economic benefits， highlighting its potential for green and sustainable industrial applications.
