Enhancement of the activity of Pd/C catalysts in aqueous phase hydrodechlorination through doping of carbon supports
The enhancement of the activity of Pd catalysts for aqueous phase hydrodechlorination (HDC) was studied using N-doped tailored supports. N-Doped (1-1.7 wt% N) and non-doped mesoporous carbon materials with equivalent pore structures were prepared via templating with MSU-F silica. At 30 °C, doping of...
| Autores: | ; ; ; ; ; |
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| Tipo de documento: | Artigo |
| Data de publicação: | 2018 |
| País: | España |
| Recursos: | Universidad Autónoma de Madrid |
| Repositório: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | Inglês |
| OAI Identifier: | oai:repositorio.uam.es:10486/699983 |
| Acesso em linha: | http://hdl.handle.net/10486/699983 https://dx.doi.org/10.1039/c8cy00384j |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | Activation energy Carbon Doping (additives) Nitrogen Silica Hydrodechlorination Reaction temperature Química |
| Resumo: | The enhancement of the activity of Pd catalysts for aqueous phase hydrodechlorination (HDC) was studied using N-doped tailored supports. N-Doped (1-1.7 wt% N) and non-doped mesoporous carbon materials with equivalent pore structures were prepared via templating with MSU-F silica. At 30 °C, doping of the support resulted in a higher catalytic activity (26 vs. 49 mmol g-1 Pd min-1 for non-doped and doped supports, respectively) in the removal of 4-chlorophenol from water. However, the activity of the catalyst with non-doped carbon supports increased more with reaction temperature, even being the most active at 70 °C (131 vs. 102 mmol g-1 Pd min-1 for non-doped and doped supports, respectively). The activation energy of the process was found to decrease from 32 to 16 kJ mol-1 due to nitrogen doping of the support. Nitrogen doping of the carbon support is an interesting strategy to prepare catalysts with high HDC activity under mild temperature conditions, whereas non-doped supports are more convenient for the intensification of the process by increasing the reaction temperature |
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