利用熱裂解法探討聚乳酸(PLA)及聚對苯二甲酸乙二酯(PET)廢容器混合回收之可行性
| 中文摘要 | 聚乳酸(PLA)為普遍使用之生質塑膠，但因廢棄後與傳統塑膠辨識度不佳，致回收再利用價值降低，故本研究欲以熱裂解方法探討PLA與聚對苯二甲酸乙二酯(PET)廢容器混合回收之可行性，藉以提高其資源化效益，供主管機關及回收業者參考。 本研究將PLA及PET廢容器前處理後，依不同比例進行相關參數之實驗分析，再進行熱重分析(TGA)，並依TGA反應條件進行實驗型熱裂解爐實驗，最後將TGA與熱裂解爐實驗結果分別進行熱裂解反應動力學分析。 實驗結果顯示，PLA及PET熱值分別約為4361、5458kcal/kg，其混合物熱值介於兩者間；PLA、PET及其混和物可燃份皆高於96%，灰分低於3%；PLA及PET組成元素以碳、氧比例最高；PLA、PET玻璃轉移溫度分別為341、352K，熔融溫度分別為430、524K；TGA分析結果，PLA最大裂解溫度約為628~653K，PET約為709~731K；熱裂解爐反應結果，PLA比例越高，氣態產物產率越高，PET比例越高，固態產物及冷凝物產率越高，升溫速率越慢，固態產物產率越高、冷凝物及氣態產物產率越低，其熱裂解產物之能源產率趨勢與產物產率一致；熱裂解反應動力學結果，PET比例越高時，活化能及頻率因子越高；產物性質分析結果顯示，熱裂解後產物對於環境應屬友善的。 | ||
|---|---|---|---|
| 中文關鍵字 | 聚乳酸、聚對苯二甲酸乙二酯、熱裂解、資源回收 | ||
基本資訊
| 專案計畫編號 | EPA-102-X18 | 經費年度 | 102 | 計畫經費 | 752 千元 |
|---|---|---|---|---|---|
| 專案開始日期 | 2013/04/12 | 專案結束日期 | 2013/11/30 | 專案主持人 | 戴華山 |
| 主辦單位 | 回收基管會 | 承辦人 | 吳嘉琳 | 執行單位 | 國立高雄第一科技大學 |
成果下載
| 類型 | 檔名 | 檔案大小 | 說明 |
|---|---|---|---|
| 期末報告 | EPA-102- X18公開版.pdf | 0MB |
Mix-recycling of wasted polylactide (PLA) and polyethylene terephthalate (PET) by using pyrolysis me
| 英文摘要 | Poly lactic acid (PLA) has been used as common bioplastics nowadays, but the difficulties of identifying waste bioplastics and traditional plastics resulting in the decrease of the recycling values. Therefore, this study is aimed to investigate the feasibility of recycling the mixture of waste PLA and polyethylene terephthalate (PET) by pyrolysis, to increase the benefits of recycling. The results will serve as references for competent authorities and recycling dealers. The waste PLA and PET were mixed with various ratios and analyzed after pretreatment, then the parametric experiments were conducted. The pyrolysis experiments were conducted based on the reaction parameters obtained from TGA experiments, then the dynamics analysis were conducted according to the results of TGA and pyrolysis. The results showed that the calorific values of PLA and PET were approximately 4361 and 5458 kcal/kg, respectively, and those of the mixtures were in between them. The combustibles of both PLA and PET were higher than 96%, and the ashes were lower than 3%. PLA and PET both contained mostly carbon and oxygen. The glass transition temperatures of PLA and PET were 341 and 352K and the melting temperatures were 430 and 524K, respectively. TGA results showed that the maximum decomposition temperatures of PLA and PET were approximately 628~653K and 709~731K, respectively. Pyrolysis results showed that the gas yield increased with increased ratio of PLA to PET while the solid and condensate yields increased with increased ratio of PET to PLA; the solid yield increased while the condensate and gas yields decreased with decreased heating rates. The trends of energy yields were consistent with those of the pyrolytic product yields. The dynamics results showed that the activation energy and frequency factor increased with increased ratio of PET to PLA. The results of characteristics revealed that the pyrolytic products are supposed to be environmentally friendly. | ||
|---|---|---|---|
| 英文關鍵字 | poly lactic acid, polyethylene terephthalate, pyrolysis, resource recycling | ||