Selective hydrogenation of 1,3-butadiene: Improvement of selectivity by using additives
The objective of this work is to evaluate the behavior of isoprene as an additive to improve selectivity in the selective hydrogenation of 1,3-butadiene from 1-butene-rich cuts. To this end, the liquid-phase hydrogenation of 1,3-butadiene, 1-butene and isoprene on a commercial Pd/Al2O3 catalyst of t...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2004 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/61226 |
| Acceso en línea: | http://hdl.handle.net/11336/61226 |
| Access Level: | acceso abierto |
| Palabra clave: | 1,3-Butadiene 1-Butene Isoprene Kinetics Pd Catalyst Selective Hydrogenation https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| Sumario: | The objective of this work is to evaluate the behavior of isoprene as an additive to improve selectivity in the selective hydrogenation of 1,3-butadiene from 1-butene-rich cuts. To this end, the liquid-phase hydrogenation of 1,3-butadiene, 1-butene and isoprene on a commercial Pd/Al2O3 catalyst of the eggshell type at 313 K was studied in a batch system. It was found that the adsorption strength of isoprene is between those of 1,3-butadiene and 1-butene. Thus, in the presence of isoprene, 1-butene concentration remains practically constant even when the liquid is almost depleted from 1,3-butadiene. The improvement of the selectivity of an industrial reactor for 1-butene purification by adding isoprene was evaluated. To this end, a kinetic model was fitted to the experimental results and a simplified model of an industrial unit was adopted. It was found that adding 1% of isoprene can reduce 1-butene losses by a factor between 1.3 and 10 for H2 partial pressures ranging 100-500 kPa, respectively. |
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