Palladium-halloysite nanocomposites as an efficient heterogeneous catalyst for acetylene hydrochlorination
| Autor: | Jide Wang, Ronglan Wu, Lu Wang, Ling Zhao, Yan Haijun, Zhang Meng, Chao Yang, Jianxin Si, Xinxin Cui, Lian Lizhen, Long Zeqing, Lida Ma |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
chemistry.chemical_element Acetylene hydrochlorination 02 engineering and technology engineering.material Heterogeneous catalysis 01 natural sciences Halloysite Vinyl chloride Catalysis Biomaterials chemistry.chemical_compound 0103 physical sciences Urea 010302 applied physics Mining engineering. Metallurgy Halloysite nanotubes Pd catalysis TN1-997 Metals and Alloys 021001 nanoscience & nanotechnology Surfaces Coatings and Films Acetylene chemistry Chemical engineering Ceramics and Composites engineering 0210 nano-technology Selectivity Palladium Space velocity |
| Zdroj: | Journal of Materials Research and Technology, Vol 13, Iss, Pp 2055-2065 (2021) |
| ISSN: | 2238-7854 |
| DOI: | 10.1016/j.jmrt.2021.06.006 |
| Popis: | Halloysite nanotubes (HNTs) were employed to design and synthesize palladium-based heterogeneous catalysts with the purpose of exploring an efficient non-mercuric catalyst for acetylene hydrochlorination. Various Pd/UHNTs catalysts with urea modification were prepared using ultrasonic-assisted impregnation method and the Pd/9UHNTs catalyst exhibited the best catalytic performance, with 90% acetylene conversion and above 94% vinyl chloride selectivity under the reaction conditions of T = 160 °C, a C2H2 gas hourly space velocity (GHSV) = 150 h−1 and V(HCl): V(C2H2) = 1.25. The results demonstrated that the urea additive (mainly nitrogen species) significantly immobilized Pd species and inhibited the carbon deposition on the catalyst surface, thus contributing to enhance the catalytic performance of Pd/HNTs catalysts during the reaction. |
| Databáze: | OpenAIRE |
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