Plastic Waste Conversion over a Refinery Waste Catalyst

被引：125
作者：
Vollmer, Ina [1 ]
Jenks, Michael J. F. [1 ]
Mayorga Gonzalez, Rafael [1 ]
Meirer, Florian [1 ]
Weckhuysen, Bert M. [1 ]
机构：
[1] Univ Utrecht, Debye Inst Nanomat Sci, Inorgan Chem & Catalysis, Univ Weg 99, NL-3508 CG Utrecht, Netherlands
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 29期
基金：
欧盟地平线“2020”;
关键词：
Aromatics; coke formation; fluid catalytic cracking; plastic recycling; polypropylene; DENSITY POLYETHYLENE; ZEOLITE DEACTIVATION; CRACKING CATALYSTS; PYROLYSIS; PARTICLE; DIFFUSION; H-ZSM-5; POLYPROPYLENE; CRYSTALS; FUELS;
D O I：
10.1002/anie.202104110
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Polypropylene (PP) makes up a large share of our plastic waste. We investigated the conversion of PP over the industrial Fluid Catalytic Cracking catalyst (FCC-cat) used to produce gasoline from crude oil fractions. We studied transport limitations arising from the larger size of polymers compared to the crude oil-based feedstock by testing the components of this catalyst separately. Infrared spectroscopy and confocal fluorescence microscopy revealed the role of the FCC matrix in aromatization, and the zeolite Y domains in coking. An equilibrium catalyst (ECAT), discarded during FCC operation as waste, produced the same aromatics content as a fresh FCC-cat, while coking decreased significantly, likely due to the reduced accessibility and activity of the zeolite domains and an enhanced cracking activity of the matrix due to metal deposits present in ECAT. This mechanistic understanding provides handles for further improving the catalyst composition towards higher aromatics selectivity.
引用
收藏
页码：16101 / 16108
页数：8
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