Investigating the impact of TiO2 crystalline phases on catalytic properties of Ru/TiO2 for hydrogenolysis of polyethylene plastic waste*

被引：18

作者：

Kim, Taehyup ^{[1
]}

Nguyen-Phu, Huy ^{[1
]}

Kwon, Taeeun ^{[1
]}

Kang, Ki Hyuk ^{[2
]}

Ro, Insoo ^{[1
]}

机构：

[1] Seoul Natl Univ Sci & Technol, Dept Chem & Biomol Engn, Seoul 01811, South Korea

[2] Korea Res Inst Chem Technol KRICT, Chem & Proc Technol Div, Daejeon 34114, South Korea

来源：

ENVIRONMENTAL POLLUTION | 2023年 / 331卷

基金：

新加坡国家研究基金会;

关键词：

Plastic waste; Hydrogenolysis; Strong metal -support interaction; Ru; TiO; 2; catalyst; phase; METAL-SUPPORT INTERACTIONS; RU; CO; HYDROGENATION; DISPERSION; ORIGIN; ACIDS; FTIR; XPS;

D O I：

10.1016/j.envpol.2023.121876

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A series of TiO2-supported Ru catalysts with different TiO2 crystalline phases was synthesized and employed for the hydrogenolysis of polyethylene (PE). CO chemisorption, high-angle annular dark-field-scanning transmission electron microscopy, temperature-programmed reduction, and CO-Fourier transform infrared spectroscopy suggested that the degree of strong metal-support interactions (SMSIs) varied depending on the type of the TiO2 phase and the reduction temperature, eventually influencing the catalysis of PE hydrogenolysis. Among the synthesized catalysts, Ru/TiO2 with the rutile phase (Ru/TiO2-R) exhibited the highest catalytic activity after high-temperature reduction at 500 degrees C, indicating that a certain degree of SMSI is necessary for ensuring high activity in PE hydrogenolysis. Ru/TiO2-R could be successfully employed for the hydrogenolysis of postconsumer plastic wastes such as LDPE bottles to produce valuable chemicals (liquid fuel and wax) in high yields of 74.7%. This work demonstrates the possibility of harnessing the SMSIs in the design and synthesis of active catalysts for PE hydrogenolysis.

引用

页数：9

共 48 条

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