Chemical recycling of plastic waste to monomers: Effect of catalyst contact time, acidity and pore size on olefin recovery in ex-situ catalytic pyrolysis of polyolefin waste

被引：54

作者：

Akin, Oguzhan ^{[1
]}

Varghese, Robin John ^{[1
]}

Eschenbacher, Andreas ^{[1
]}

Oenema, Jogchum ^{[1
]}

Abbas-Abadi, Mehrdad Seifali ^{[1
]}

Stefanidis, Georgios D. ^{[1
,2
]}

Van Geem, Kevin M. ^{[1
]}

机构：

[1] Univ Ghent, Fac Engn & Architecture, Dept Mat Text & Chem Engn, Lab Chem Technol LCT, Technol Pk 125, B-9052 Zwijnaarde, Belgium

[2] Natl Tech Univ Athens, Sch Chem Engn, Iroon Polytech 9, Athens 15780, Greece

来源：

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS | 2023年 / 172卷

基金：

欧洲研究理事会;

关键词：

Plastics; Catalysts; Chemical recycling; Pyrolysis; Olefins; LIGHT OLEFINS; REACTION PATHWAYS; PARTIAL OXIDATION; HDPE PYROLYSIS; CRACKING; METHANOL; HZSM-5; HYDROCARBONS; CONVERSION; POLYPROPYLENE;

D O I：

10.1016/j.jaap.2023.106036

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The catalytic upgrading of post-consumer mixed polyolefinic waste pyrolysis vapors has been studied over five different solid acid catalysts to understand the effect of vapor-catalyst contact time and catalyst properties on the recovery of light olefins (C2-C4). HZSM-5 with Si/Al ratio of 11 and 27 produced the highest light olefins yields (83.4 wt% and 72.1 wt%, respectively) at a very short contact time of -5 ms while extending the contact time (& GE;23 ms) decreased the olefin yields and resulted in higher yields of aromatics (-30.0 wt% and -40.0 wt%, respectively). Short contact time (5 ms) was not sufficient for HZSM-22 to crack pyrolysis vapors to C2-C4 olefins (8.0 wt%) but increasing contact time improved C2-C4 yields to 53.5 wt% without increased production of aromatics, which may be attributed to its small pore size (shape selectivity). SAPO-34, SAPO-11, and Al-MCM-41 were not selective to light olefins at any studied contact time.

引用

页数：14

共 102 条

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