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The in-situ effect of H2S on the decomposition of natural rubber and catalyst activity
- Source :
- Chemosphere. 283:131252
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In this work, the pyrolysis of natural rubber (NR) under N2 and H2S atmosphere was performed to illustrate the possible effect of H2S on NR decomposition with and without catalysts. A molecular dynamics simulation based on reactive force field (ReaxFF) was also conducted to understand the interaction mechanism between H2S and intermediates from NR decomposition. Furthermore, the catalytic decomposition of NR under H2S atmosphere and the adsorption characteristics of H2S by zeolites alone were also carried out to investigate the effect of catalysts on sulfur behavior and the reversed effect of H2S on catalyst activity. This work revealed that the introduction of H2S can influence the yields of pyrolytic oil and gas, as well as composition of the oil. Combining experimental and simulation studies, H2S can interact with intermediates from NR decomposition forming sulfur-containing substances in pyrolytic oil. The H2S adsorption experiments by various catalysts revealed that catalysts can chemically adsorb H2S. The introduction of Zn can promote the adsorption ability by reacting with sulfur-containing substances to generate ZnS, with the desulfurization effect following the order of 3Zn/ZSM5 > ZSM5 > 3ZnO/ZSM5.
- Subjects :
- Environmental Engineering
Chemistry
Health, Toxicology and Mutagenesis
0208 environmental biotechnology
Public Health, Environmental and Occupational Health
02 engineering and technology
General Medicine
General Chemistry
010501 environmental sciences
01 natural sciences
Pollution
Decomposition
020801 environmental engineering
Catalysis
Flue-gas desulfurization
Adsorption
Natural rubber
Chemical engineering
visual_art
visual_art.visual_art_medium
Environmental Chemistry
Pyrolytic carbon
ReaxFF
Pyrolysis
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 00456535
- Volume :
- 283
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi...........58e6eef7f6073a738f91b92bffc21e74