State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, PR China; Institute of Waste Treatment & Reclamation, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai 200092, PR China.
Institute of Waste Treatment & Reclamation, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai 200092, PR China.
Sci Total Environ. 2021 Jun 10;772:145309. doi: 10.1016/j.scitotenv.2021.145309. Epub 2021 Feb 2.
The explosive growth of polyethylene terephthalate (PET) wastes has brought serious pollution to the environment. Here, PET waste was upcycled into methane-rich pyrolysis gas and carbon material for energy storage through autogenic pressure pyrolysis and post-activation. The pyrolysis gas contained 34.58 ± 0.23 vol% CH. After CO removal, the high caloric value of the pyrolysis gas could reach 29.2 MJ m, which could be used as a substitute natural gas. Pyrolytic carbon was further activated by KOH and ZnCl. KOH-activated carbon (AC-K) obtained a hierarchical porous structure, a high specific surface area of 2683 m g and abundant surface functional groups. Working as supercapacitor electrodes, AC-K exhibited an outstanding specific capacitance of 325 F g at a current density of 0.5 A g. After 5000 charge-discharge cycles, AC-K still retained 91.86% of the initial specific capacitance. This study provides a sustainable way to control plastic-derived pollution and alleviate the energy crisis.
聚对苯二甲酸乙二醇酯 (PET) 废弃物的迅猛增长给环境带来了严重的污染。在这里，通过自生压力热解和后活化，将 PET 废物升级为富含甲烷的热解气和储能用碳材料。热解气中含有 34.58±0.23 体积%的 CH。去除 CO 后，热解气的高热值可达 29.2 MJ m，可作为替代天然气。进一步用 KOH 和 ZnCl 对热解碳进行活化。KOH 活化碳 (AC-K) 具有分级多孔结构，比表面积高达 2683 m g，表面富含丰富的官能团。作为超级电容器电极，AC-K 在 0.5 A g 的电流密度下表现出 325 F g 的出色比电容。经过 5000 次充放电循环后，AC-K 仍保留了初始比电容的 91.86%。这项研究为控制塑料衍生污染和缓解能源危机提供了一种可持续的方法。
