Estudios de difusión de mezclas de propano y propeno en zeolita Si-LTA (ITQ-29) empleando scattering cuasielástico de neutrones (QENS)
[EN] The separation process of propane-propene mixtures is very important in the petrochemical industry and the development of a non-cryogenic alternative method still remains a challenge. Such alternative process would mean great both energetic and economic savings. One of the possible candidates i...
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| Tipo de documento: | Dissertação de mestrado |
| Data de publicação: | 2016 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositório: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | Espanhol |
| OAI Identifier: | oai:riunet.upv.es:10251/76814 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/76814 |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | Propano Propeno Parafinas Olefinas ITQ-29 Zeolitas LTA zeolites Sílice Quasielastic neutron scattering (QENS) Neutron scattering Neutrones Dispersión cuasielástica de neutrones INGENIERIA QUIMICA Máster Universitario en Química Sostenible-Màster Universitari en Química Sostenible |
| Resumo: | [EN] The separation process of propane-propene mixtures is very important in the petrochemical industry and the development of a non-cryogenic alternative method still remains a challenge. Such alternative process would mean great both energetic and economic savings. One of the possible candidates is adsorptive separation using zeolite adsorbents. In the present work the competitive diffusion of propene in the presence of d8- propane and of propane in the presence of d6-propene in the zeolite ITQ-29 has been studied, in order to characterize the molecular motions of propene and propane at a microscopic scale and calculate its diffusion coefficient at different temperatures. It has been found that the motion can’t be fully explained by free traslational diffusion and that it might be similar to diffusion inside a closed spherical volume, which would correspond to the zeolite cavities. Under the studied conditions propane seems to diffuse faster than propene. |
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