With the rapid development of the printing industry, the amount of waste toner is increasing. Waste toner should be properly disposed because of great harmfulness and carcinogenicity to humans and the environment. For the disposal of waste toner, the previous work developed a vacuum gasification method to convert it into oils and nanoparticles with benefits of environment friendliness and low energy consumption. The properties of toner particles enable them to be transformed into high-value-added products during vacuum gasification. The vacuum gasification mechanism is further revealed in this paper. The first-order thermal dynamics shows well that the average values of apparent activation energy E and frequency factor A are 12 547.390 kJ mol^–1 and 10 148.120 min^–1, respectively. Single-factor experiments show that, in the range 773–973 K, the residence time of 40 min and heating rate of 15 K min^–1 are significant and sufficient to obtain maximum oil yield, meaning the complete separation of nonmetal components from nanometal particles. Furthermore, we infer the pyrolysis pathways of acrylate–styrene copolymer at 873 K and carbon reduction reactions between carbon and Fe₃O₄ at 1023–1173 K and 100 Pa. This paper provides specific parameter guidance for industrial applications and mechanism analysis for efficient utilization of waste toner by the vacuum pyrolysis method.

中文翻译：

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有机物的热解程序及真空气化参数回收有害废粉的参数优化

随着印刷工业的快速发展，废调色剂的量正在增加。由于对人类和环境具有极大的危害和致癌性，应适当处理废弃的碳粉。对于废弃调色剂的处置，先前的工作开发了一种真空气化方法，可将其转化为油和纳米颗粒，具有环境友好性和低能耗的优点。调色剂颗粒的特性使它们可以在真空气化过程中转变成高附加值的产品。本文进一步揭示了真空气化机理。一阶热力学很好地表明，表观活化能E和频率因子A的平均值为12 547.390 kJ mol ^–1和10 148.120 min ^–1分别。单因素实验表明，在773–973 K范围内，停留时间40分钟和15 K min ^–1的加热速率非常重要，足以获得最大的出油率，这意味着将非金属成分与纳米金属颗粒完全分离。此外，我们推断了丙烯酸酯-苯乙烯共聚物在873 K时的热解途径以及碳与Fe ₃ O ₄在1023–1173 K和100 Pa下的碳还原反应。真空热解法处理废碳粉。