Temperature-dependent highly active LaCaMgAl 2 O 4 catalyst effect on carbon nanomaterial and hydrogen generation from polymethyl methacrylate plastic.

Autor: Prabu S; Graduate Institute of Environmental Engineering, National Central University, Taiwan, No. 300, Chung-Da Road., Chung-Li District, Tao-Yuan City, 32001, Taiwan., Vinu M; Graduate Institute of Environmental Engineering, National Central University, Taiwan, No. 300, Chung-Da Road., Chung-Li District, Tao-Yuan City, 32001, Taiwan., Chiang KY; Graduate Institute of Environmental Engineering, National Central University, Taiwan, No. 300, Chung-Da Road., Chung-Li District, Tao-Yuan City, 32001, Taiwan. Electronic address: kychiang@ncu.edu.tw.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Oct; Vol. 366, pp. 143540. Date of Electronic Publication: 2024 Oct 13.
DOI: 10.1016/j.chemosphere.2024.143540
Abstrakt: The increasing accumulation of waste polymethyl methacrylate (PMMA) plastics presents a significant environmental challenge, while the demand for renewable energy sources continues to rise. Thermochemical recycling is a prospective technique for converting waste plastics into high-value chemicals, both economically and environmentally. In this work, the catalytic pyrolysis of waste PMMA plastics over LaCaMgAl 2 O 4 nanosheets (NSs) catalyst is being investigated for its potential to produce hydrogen and carbon nanotubes (CNTs) in a two-stage fixed-bed reactor. The yield and purity of the gaseous products, as well as carbon deposition, concerning the effects of temperature during the catalysis process. Additionally, a small portion of LaCa was incorporated into the MgAl 2 O 4 composite in the pre-catalysts under investigation. Analyzing the physicochemical properties of the carbon nanomaterials that form provides valuable insights into the workings of different catalysts. It's noteworthy that LaCaMgAl 2 O 4 NSs showed such large yields of H 2 (82.71 vol% H 2 ) and CNTs (388 mg g -1 ) at 750 °C. The LaCaMgAl 2 O 4 NSs catalyst's impressive ability to produce CNTs and H 2 gas at high yields underscores its efficacy and potential for real-world catalytic pyrolysis applications. This study emphasizes the Nanocatalyst's potential for large-scale catalytic pyrolysis operations, providing a workable and efficient way of converting waste plastics into high-value products and renewable energy.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:Kung-Yuh Chiang reports financial support was provided by Taiwan National Science and Technology Council (NSTC).
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Databáze: MEDLINE
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