變廢為寶：循環利用廢棄寶特瓶成碳捕獲吸附材料

Transforming waste into value: upcycling discarded PET bottles into carbon capture adsorbents

經濟快速發展，各種商業活動、工業生產行為持續增長，主因廣泛認定是溫室氣體排放造成氣候變遷、異常天氣等嚴重環境問題，是全球性污染之議題，其中二氧化碳（CO2）為主要的人為溫室氣體。各國紛紛承諾CO2排放減量並逐步邁向淨零排放，除提高能源使用效率、發電效率及使用再生能源外，CO2捕獲封存及再利用（CO2 capture, utilization and storage, CCUS）則為重點開發技術之一。聚對苯二甲酸乙二醇酯(polyethylene terephthalate)，簡稱聚酯(polyester, PET)，每年生產近5億個PET寶特瓶，但大部分被丟棄在垃圾掩埋場或海洋中，回收循環利用率低之原因有收集困難、染料和增塑劑的存在不易分離等問題。本文章將介紹循環利用廢棄寶特瓶製成碳捕獲吸附材料之方法。並回顧近年PET合成金屬有機框架（MOFs PET）與PET製備多孔碳材料（Porous carbon PET）製程方法之研究。最後，希望藉由對CO2吸附效能評估，使吸附材料儘早達成工業化應用。

With rapid economic development, various commercial activities and industrial production have been consistently increasing. The primary reason widely recognized for this trend is the emission of greenhouse gases, leading to severe environmental issues such as climate change and abnormal weather patterns. Greenhouse gases, with carbon dioxide being the main anthropogenic contributor, pose a global pollution issue. Countries worldwide have committed to reducing CO2 emissions and gradually moving towards net-zero emissions. In addition to improving energy efficiency, power generation efficiency, and utilizing renewable energy sources, Carbon Capture, Utilization, and Storage is a key technology focus. Polyethylene terephthalate, commonly known as polyester, is produced at a rate of nearly 500 million PET bottles per year. However, a significant portion of these bottles is discarded in landfills or oceans. The low recycling rate is attributed to challenges in collection, as well as difficulties in separating dyes and plasticizers. This article introduces a method of recycling discarded PET bottles to create carbon capture adsorption materials. It reviews recent research on the synthesis of Metal-Organic Frameworks on PET (MOFs PET) and the preparation of porous carbon materials on PET (Porous carbon PET). In conclusion, through the evaluation of CO2 adsorption performance, the adsorption materials can achieve industrial applications in the near future.