印刷電路板之循環物料作為化學迴路空氣分離材料之應用

Application of recycled printed circuit board as the material for chemical looping air separation

10.29911/JEHVACE_NEW.202103_(126).0004

高靖棣(C.T. Kao)；張書懷(S.H. Chang)；沈政憲(C.H. Shen)；萬皓鵬(H.P. Wan)

化學迴路 ； 空氣分離 ； 氧化還原反應 ； 循環經濟 ； Chemical looping ； Air separation ； Redox reaction ； Circular economy

冷凍空調&能源科技

126期（2021 / 03 / 10）

49 - 55

繁體中文

本研究利用印刷電路板產業中的銅系工業循環物料，取代傳統高價格以化學品製備的氧化銅，作為化學迴路空氣分離技術的材料，預期可達到降低成本，提升技術競爭力的優勢。化學迴路空氣分離為化學迴路程序延伸且新興之應用，藉由高溫不同氧分壓下金屬氧化物的相變化，可促使氧氣自發的於釋氧反應中釋出；釋出氧氣後的金屬氧化物並可通過氧化反應抓取空氣中的氧氣，回復其氧化態。而藉由上述不斷循環的氧化釋氧反應，便可達到分離空氣達到產製氧氣的效益。本研究除對印刷電路板回收物料的粉末特性進行分析，更進一步評估其應用於化學迴路空氣分離之可行性。評估結果包含成份與微結構分析、多迴圈氧化釋氧反應及其動力學分析，以及尾氣氣體成份分析等。結果顯示，此循環物料除了具備成本優勢外，於長時間高溫氧化釋氧反應下，仍保有良好釋氧率，極具作為化學迴路空氣分離材料之潛力。

Copper-based by-product (copper scrap) from printed circuit board industry, instead of copper oxide, is adopted as oxygen carrier material. It is expected to achieve the advantages of cost reduction and strengthening of competitiveness compared to other air separation technologies. Chemical looping air separation (CLAS) is an emerging application of chemical looping processes. By altering the phase transformation of metal oxide called oxygen carrier, oxygen can be released spontaneously within the reduction reaction. Reduced metal oxide can be oxidized to reclaim its oxygen by reacting with oxygen in air during oxidization reaction. Air separation can be given by repeating oxidation-reduction processes. The material property of copper scrap has been analyzed in present study. Furthermore, feasibility of the application of copper scrap for chemical looping air separation was evaluated. Measurement of composition and microstructure, reactivity test, multiple redox reaction kinetic analysis, and flue gas analysis were conducted in this study. The results have shown that copper scrap has full potential to be utilized as oxygen carrier for CLAS process with its cost advantage and moderate oxygen-releasing capability after long-term high-temperature reaction.

1. Adánez, J.,Gayán, P.,Celaya, J.,de Diego, L.F.,Garcia-Labiano, F.,Abad, A.(2006).Chemical Looping Combustion in a 10 kWth Prototype Using a CuO/Al2O3 Oxygen Carrier: Effect of Operating Conditions on Methane Combustion.Insustrial & Engineering Chemistry Research,45,6075-6080.
2. de Diego, L. F.,García-Labiano, F.,Adánez, J.,Gayán, P.,Abad, A.,Corbella, B. M.,Palacios, J. M.(2004).Development of Cu-Based Oxygen Carriers for Chemical-Looping Combustion.Fuel,83,1749-1757.
3. Fan, J.,Zhu, L.(2015).A Novel Technique based on Coal Gasification Integrated with Chemical Looping Air Separation.Journal of Fundamentals of Renewable Energy and Applications,5
4. Farooq, S.,Ruthven, D. M.,Boniface, H. A.(1989).Numerical simulation of a pressure swing adsorption oxygen unit.Chemical Engineering Science,44,2805-2816.
5. International energy agency(2007).,未出版
6. Shah, K.,Moghtaderi, B.,Wall, T.(2012).Selection of Suitable Oxygen Carriers for Chemical Looping Air Separation: A Thermodynamic Approach.Energy Fuels,26(4),2038-2045.
7. Zhou, C.,Shah, K.,Moghtader, B.(2015).TechnoEconomic Assessment of Integrated Chemical Looping Air Separation for Oxy-Fuel Combustion: An Australian Case Study.Energy Fuels,29,2074-2088.