Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Longpan Road 159, Nanjing 210037, China.
Jiangsu Province Key Laboratory of Biomass Energy and Materials, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), No. 16, Suojin Five Village, Nanjing 210042, China.
Environ Sci Technol. 2020 Jul 7;54(13):8390-8400. doi: 10.1021/acs.est.0c00899. Epub 2020 Jun 15.
Converting polycarbonate (PC) plastic waste into value-added chemicals and/or fuel additives by catalytic pyrolysis is a promising approach to dispose of solid wastes. In this study, a series of Fe-Ce@AlO metal oxides were prepared by coprecipitation, impregnation, and a direct mixing method. The synthesized catalysts were then employed to investigate the catalytic conversion of PC wastes to produce aromatic hydrocarbons. Experimental results indicated that Fe-Ce@AlO prepared by coprecipitation possessed superior catalytic activity because of its high content of weak acid sites, large pore volume, high surface area, and well dispersion of Fe and Ce active species, leading to an ∼3-fold increase in targeted monocyclic aromatic hydrocarbons compared to that achieved noncatalytically. Moreover, an increase in the catalyst to feedstock (C/F) mass ratio was beneficial to the production of aromatic hydrocarbons at the expense of phenolic products, and elevating the C/F ratio from 1:1 to 3:1 considerably increased the benzene formation as the enhancement factor was increased from 2.3 to 8.8.
通过催化热解将聚碳酸酯（PC）塑料废物转化为增值化学品和/或燃料添加剂是处理固体废物的一种很有前途的方法。在这项研究中，通过共沉淀、浸渍和直接混合法制备了一系列 Fe-Ce@AlO 金属氧化物。然后，将合成的催化剂用于研究 PC 废物的催化转化以生产芳烃。实验结果表明，由于其具有高含量的弱酸位、大孔体积、高表面积和 Fe 和 Ce 活性物种的良好分散性，通过共沉淀制备的 Fe-Ce@AlO 具有优异的催化活性，导致目标单环芳烃的产率增加了约 3 倍，而非催化转化的产率则增加了约 3 倍。此外，增加催化剂与原料（C/F）的质量比有利于芳烃的生成，而酚类产物的生成则减少，将 C/F 比从 1:1 提高到 3:1，苯的生成显著增加，增强因子从 2.3 增加到 8.8。
