Ordered Mesoporous Carbon as a Support for Palladium-Based Hydrodechlorination Catalysts
Ordered mesoporous carbon (OMC) was employed as a support for palladium nanoparticles in catalysts for the gas phase hydrodechlorination (HDC) of trichloromethane (TCM). 1 wt% palladium was incorporated using three methods: incipient wetness (IW); a dilute solution (DS) method; and a solid-liquid (S...
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MDPI AG
2020-12-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/1/23 |
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| author | Farzeen Sakina Carlos Fernandez-Ruiz Jorge Bedia Luisa Gomez-Sainero Richard T. Baker |
| author_facet | Farzeen Sakina Carlos Fernandez-Ruiz Jorge Bedia Luisa Gomez-Sainero Richard T. Baker |
| author_sort | Farzeen Sakina |
| collection | DOAJ |
| description | Ordered mesoporous carbon (OMC) was employed as a support for palladium nanoparticles in catalysts for the gas phase hydrodechlorination (HDC) of trichloromethane (TCM). 1 wt% palladium was incorporated using three methods: incipient wetness (IW); a dilute solution (DS) method; and a solid-liquid (SL) method. The effect of the preparation method on catalyst structure and activity was investigated. Catalyst composition and nanostructure were studied using gas physisorption, high specification transmission electron microscopy and X-ray photoelectron spectroscopy. Catalytic conversion and product selectivities were determined in steady-state activity tests at temperatures between 70 and 300 °C. Two of the catalysts (IW and DS) showed excellent dispersion of fine Pd nanoparticles of average diameter ~2 nm. These materials showed excellent activity for HDC of TCM which compares favourably with the performance reported for Pd on amorphous carbon catalysts. In addition, they showed relatively high selectivities to the more valuable higher hydrocarbons. However, the SL method gave rise to catalysts with larger particles (~3 nm) and a less uniform palladium distribution. This resulted in lower conversion and lower selectivities to higher hydrocarbons and in more severe catalyst deactivation at the highest reaction temperatures. |
| first_indexed | 2024-03-10T13:43:19Z |
| format | Article |
| id | doaj.art-1fd34568e343412280d805de7224a26e |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T13:43:19Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-1fd34568e343412280d805de7224a26e2023-11-21T02:48:34ZengMDPI AGCatalysts2073-43442020-12-011112310.3390/catal11010023Ordered Mesoporous Carbon as a Support for Palladium-Based Hydrodechlorination CatalystsFarzeen Sakina0Carlos Fernandez-Ruiz1Jorge Bedia2Luisa Gomez-Sainero3Richard T. Baker4School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, UKDepartamento de Ingeniería Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, SpainDepartamento de Ingeniería Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, SpainDepartamento de Ingeniería Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, SpainSchool of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, UKOrdered mesoporous carbon (OMC) was employed as a support for palladium nanoparticles in catalysts for the gas phase hydrodechlorination (HDC) of trichloromethane (TCM). 1 wt% palladium was incorporated using three methods: incipient wetness (IW); a dilute solution (DS) method; and a solid-liquid (SL) method. The effect of the preparation method on catalyst structure and activity was investigated. Catalyst composition and nanostructure were studied using gas physisorption, high specification transmission electron microscopy and X-ray photoelectron spectroscopy. Catalytic conversion and product selectivities were determined in steady-state activity tests at temperatures between 70 and 300 °C. Two of the catalysts (IW and DS) showed excellent dispersion of fine Pd nanoparticles of average diameter ~2 nm. These materials showed excellent activity for HDC of TCM which compares favourably with the performance reported for Pd on amorphous carbon catalysts. In addition, they showed relatively high selectivities to the more valuable higher hydrocarbons. However, the SL method gave rise to catalysts with larger particles (~3 nm) and a less uniform palladium distribution. This resulted in lower conversion and lower selectivities to higher hydrocarbons and in more severe catalyst deactivation at the highest reaction temperatures.https://www.mdpi.com/2073-4344/11/1/23palladiumporous materialshydrodechlorinationchloroalkanecatalysisTEM |
| spellingShingle | Farzeen Sakina Carlos Fernandez-Ruiz Jorge Bedia Luisa Gomez-Sainero Richard T. Baker Ordered Mesoporous Carbon as a Support for Palladium-Based Hydrodechlorination Catalysts Catalysts palladium porous materials hydrodechlorination chloroalkane catalysis TEM |
| title | Ordered Mesoporous Carbon as a Support for Palladium-Based Hydrodechlorination Catalysts |
| title_full | Ordered Mesoporous Carbon as a Support for Palladium-Based Hydrodechlorination Catalysts |
| title_fullStr | Ordered Mesoporous Carbon as a Support for Palladium-Based Hydrodechlorination Catalysts |
| title_full_unstemmed | Ordered Mesoporous Carbon as a Support for Palladium-Based Hydrodechlorination Catalysts |
| title_short | Ordered Mesoporous Carbon as a Support for Palladium-Based Hydrodechlorination Catalysts |
| title_sort | ordered mesoporous carbon as a support for palladium based hydrodechlorination catalysts |
| topic | palladium porous materials hydrodechlorination chloroalkane catalysis TEM |
| url | https://www.mdpi.com/2073-4344/11/1/23 |
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