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Previous issue date: 2012-10-09 / The Crude Glycerin, by-product of biodiesel manufacturing, became a problem for producers due to its low value of commercialization; besides, it does not have a real application on the industrial sector because of its high level of NaCl (~7%). These technical difficulties impede its absorption by the industry. On this paper we use the life cycle assessment methodology to evaluate the environmental performance of two processes of purification of Crude Glycerin, the distillation process and the viacetal process which is being developed by Petrobras. The system boundaries are assessed from cradle to gate, that is, we evaluate the glycerin from soybean cultivation to biodiesel production, oil extraction, transesterification and purification. The results on Greenhouse Gas point to the agricultural phase as the critical step in the life cycle of glycerol, representing 49% of 4167 kg CO2-Eqv per ton of Glycerol purified by distillation process while the purification process represents only 10% of this category of impact. / A glicerina loira, co-produto da produ??o do biodiesel, tornou-se um problema para os produtores devido ao baixo valor de comercializa??o. Al?m disso, n?o encontra espa?o no setor industrial para aplica??o, pois apresenta elevado percentual de NaCl (~7%) impedindo a sua absor??o pela ind?stria devido a dificuldades tecnol?gicas. Neste trabalho utilizamos a metodologia de Avalia??o do Ciclo de Vida para avaliar o desempenho ambiental de dois processos de purifica??o da glicerina loira, o processo de destila??o e o processo viacetal que esta sendo desenvolvido pela Petrobras. As fronteiras do sistema avaliado s?o do ber?o ao port?o, ou seja, avaliamos a glicerina desde o cultivo da soja para a produ??o do biodiesel, extra??o do ?leo, transesterifica??o e purifica??o. Os resultados para Gases de Efeito Estufa apontam a fase agr?cola como a etapa critica no ciclo de vida do glicerol, representando 49% de 4167 kg CO2-Eqv por 1,0 tonelada de glicerol purificado pelo processo de destila??o, o processo de purifica??o representa 10% desta categoria de impacto.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/3234 |
| Date | 09 October 2012 |
| Creators | Silva, Wagner Menezes da |
| Contributors | Seferin, Marcus |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Engenharia e Tecnologia de Materiais, PUCRS, BR, Faculdade de Engenharia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -7432719344215120122, 500, 600, -655770572761439785 |
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