指導教授:林正芳臺灣大學:環境工程學研究所洪淑惠Hung, Shu-HuiShu-HuiHung2014-11-302018-06-282014-11-302018-06-282014http://ntur.lib.ntu.edu.tw//handle/246246/264178為因應世界新環境法規規範,發展出若干電池回收程序,大部分電池廢料皆可以物理或化學方法回收並於電池製程或其他工業中再次利用,此過程對環境影響甚巨,需有完善之廢電池回收程序,才可將廢棄電池之環境衝擊降至最低,值得審慎探討,目前二次鋰離子電池兼具有低資源化與去毒化等條件,其電池組成成分鋰、鈷金屬亦屬高價格原料,本研究針對廢棄鋰離子電池進行比較物理/化學回收處理技術原理及應用技術評估。 此外,利用「生命週期評估」分析環境衝擊影響結果,包括:全球氣候變遷、酸化、優養化、生態系統、人類現況等潛能加以探討,依據各單元程序之原理、應用、優勢、劣勢等面向進行評析;再針對廢棄鋰離子電池中之貴重金屬回收效率、化學藥劑使用量、回收處理時間、能源消耗量及廢棄物產生量等3E(工程面、環境面、經濟面)評估指標進行處理單元技術評估,建議可行之物理化學回收處理單元程序。 研究結果顯示,進行實驗室溶劑萃取實驗使用D2EHPA萃取劑於pH 5、萃取劑濃度為0.2 M,萃取時間為1小時,經萃取後30-40分鐘趨於穩定;此四種金屬的萃取百分比依序為:錳>鈷> 鎳>鋰(85% > 83% > 80% > 19%)。另使用P507萃取劑於pH 6、萃取劑濃度為0.2 ,4種金屬的萃取百分比依序為錳>鈷>鎳>鋰(97% > 95% > 94% > 2.7%)。 本研究應用反應曲面法(Response Surface Methodology;RSM)推估di (2-ethylhexyl) phosphoric acid (D2EHPA)萃取劑對鈷離子最適回收率為97.98%,其最佳操作條件pH值為5、萃取時間為55分鐘;最後再依據前述生命週期評估及3E(工程面、環境面、經濟面) 技術評估結果提出最適化處理系統技術,達成低成本、高效率、資源回收及二次公害之目標。Spent lithium ion batteries (LIBs) contain lots of valuable metals such as aluminum, cobalt, copper, lithium, manganese, and nickel. The separation and recovery of cobalt and lithium among these metal mixtures are attractive due to their comparatively high price. However, the energy consumption and chemical additives would lead to additional environmental impacts. In this study, eight different scenarios of LIBs recovery technologies were evaluated from the engineering, environmental and economic (3E) aspects. A life cycle assessment (LCA) was implemented in Umberto, and the Eco-invent database in Umberto was used to assess the environmental impact of various LIB recovery technologies. Impact categories including IPCC 2007, Impact 2002+, and CML 2001 were selected. Various impact factors, e.g., global warming, climate change potential, ecosystem quality, human health, aquatic acidification, eutrophication potential and human toxicity, were evaluated for various scenarios. The results indicated that the use of a strong acid could achieve high leaching efficiency, but generation of Cl2, NOx and SOx may cause environmental problems. The addition of HCl would have a greater impact than that of NH2OH and H2SO4, of which the potential was 0.021 kg SO2-Eq for acidification, 0.017 kg CO2-Eq for climate change (GWP-100a), 0.015 kg NOx for eutrophication, 0.0164 kg 1,4-DCB for human health (HTP-100a), and 0.00058 kg ethylene. In addition, since the chemical extraction would result in the greatest impacts on environment, the solvent extraction of Li, Co, Mn, and Ni from spent LIBs was carried out using sodium - di (2-ethylhexyl) phosphoric acid (Na-D2EHPA) and mono-2-ethylhexyl ester (Na-P507) dissolved in kerosene. The results indicated that the percentage extraction for the metal ions including Li, Co, Mn, and Ni increased as the increase of equilibrium pH. In addition, Mn was preferentially extracted over Li, Co, and Ni with the extractants, where the maximized separation factor was operated under an O/A ratio of 1:1 was maximized with 1.0 M D2EHPA at an equilibrium pH value of 3.5. Lastly, according to the 3E analysis and response surface methodology, the optimum operations of physico-chemical processes for LIB recovery were proposed.第一章 緒論 1-1 1.1 前言 1-1 1.2 研究目的 1-2 1.3 研究內容與架構 1-2 第二章 文獻回顧 2-1 2.1 鋰離子二次電池 2-1 2.1.1 鋰離子電池原理與結構 2-1 2.1.2 鋰離子電池種類比較 2-2 2.1.3 鋰離子電池的發展與產業鏈 2-5 2.2鋰離子電池回收管理制度 2-8 2.3鋰離子電池回收處理技術 2-12 2.3.1 回收處理技術概述 2-12 2.3.2 溶劑萃取處理技術 2-15 2.3.3 萃取平衡原理及機制 2-16 2.4 生命週期評估方法及應用 2-19 2.4.1 目標與範疇界定 2-19 2.4.2 盤查分析 2-19 2.4.3 衝擊評估 2-20 2.4.4 結果闡釋 2-20 第三章 研究方法 3-1 3.1 研究架構 3-1 3.2 程序評估 3-3 3.3 萃取程序評估 3-6 3.3.1 鋰離子電池實驗材料 3-6 3.3.2 化學萃取實驗 3-6 3.3.3 儀器鑑定分析 3-12 3.4 生命週期評估方法 3-13 3.4.1 評估流程 3-13 3.4.2 目標與範疇界定 3-15 3.4.3 生命週期盤查分析 3-16 3.4.4 環境衝擊評估 3-24 3.4.5 軟體簡介與操作流程 3-29 3.5 回收處理程序最適化 3-34 3.5.1 最適化流程 3-34 3.5.2 反應曲面法 3-35 3.5.3 3E分析架構 3-37 第四章 結果與討論 4-1 4.1 物理處理程序評估 4-1 4.1.1 程序效能評估結果 4-1 4.1.2 環境衝擊分析結果 4-5 4.1.3 總體績效分析結果 4-8 4.1.4 小結 4-11 4.2 化學處理程序評估 4-11 4.2.1 程序效能評估結果 4-11 4.2.2 環境衝擊分析結果 4-20 4.2.3 總體績效評估結果 4-30 4.2.4 小結 4-32 4.3 化學萃取程序研發 4-33 4.3.1 材料鑑定分析 4-33 4.3.2 萃取程序效能評估 4-37 4.3.3 環境衝擊評估結果 4-47 4.3.4 小結 4-50 4.4 程序最適化評估結果 4-51 4.4.1 物化處理程序研析 4-51 4.4.2 整合技術評估 4-57 4.4.3 最適化程序與操作 4-60 第五章 結論與建議 5-1 5.1 結論 5-1 5.2 建議 5-3 參考文獻 R-1 附錄 R-73548359 bytesapplication/pdf論文公開時間:2019/08/25論文使用權限:同意有償授權(權利金給回饋學校)生命週期評估3E(工程面、環境面、經濟面)反應曲面法最適化處理系統[SDGs]SDG3[SDGs]SDG7[SDGs]SDG12[SDGs]SDG13廢棄鋰離子電池回收處理技術評估Assessment of Physico-Chemical Processes for Lithium Ion Recovery from Spent Lithium Ion Batteries (LIBs)thesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/264178/1/ntu-103-D96541011-1.pdf