Columns with parallel streams applied to the steam stripping of edible oils

Autor(es)

Paiva, Camila Leite ; Biasi, Lilian Caroline Kramer ; Ceriani, Roberta

• Tipo de documento: Artigo Científico
• Fonte: CHEMICAL ENGINEERING RESEARCH & DESIGN; v. 208, p. 12-pg., 2024-07-20.

Resumo

Parastripping involves splitting the vapor flow within the stripping column. This arrangement can reduce the height of the column, utility requirements, and, consequently, overall costs. Nevertheless, studies on parastripping are scarce and do not consider multicomponent mixtures. This work aimed to investigate by rigorous simulation the multicomponent parastripping process applied to the steam deacidification of edible oils. The effects of process variables, such as feed temperature, column pressure, and stripping steam flow rate, which impact final oil acidity, neutral oil loss, and tocopherol recovery, were evaluated using the response surface methodology (RSM). Optimal ranges for the investigated process variables were determined to achieve an oil acidity of 0.03 %w/w of oleic acid. Through RSM, an optimised region for the three independent variables was identified - pressures (<3.5 mBar), mild temperatures (230-240 degrees C) and stripping steam of 0.9% of the oil load), which reduced operation costs and possibly prevents the formation of glycidyl esters and trans-fatty acids. Within this region an optimised condition of temperature was set (233 degrees C), and the effects of pressure and % of stripping were analysed by varying (233 degrees C, 3.5 mBar and 0.9 %w/w of stripping steam) on was deeply analysed in terms of successful for reaching a final oil acidity < 0.03 %w/w - a value conforming to industrial standards - with 19 % of tocopherol recovery in the distillate and 0.5 % neutral oil loss. Further analyses were performed on the temperature and molar flow profiles of the oil compounds as a function of the parastripping stages. These results clearly demonstrated that decision-making could be based on this analysis. (AU)

• Processo FAPESP: 16/18253-0 - Equilíbrio de fases nas tecnologias de lipídeos e de biocombustíveis
• Beneficiário: Roberta Ceriani
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 21/11380-5 - CPTEn - Centro Paulista de Estudos da Transição Energética
• Beneficiário: Luiz Carlos Pereira da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Ciência para o Desenvolvimento
• Processo FAPESP: 21/09028-1 - Uso de solventes orgânicos na extração e refino de óleos vegetais: determinação de propriedades físicas e energias livres de Gibbs por simulação molecular
• Beneficiário: Lilian Caroline Kramer Biasi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/21252-0 - Equilíbrio e processos de produção de biocombustíveis e bioprodutos
• Beneficiário: Antonio José de Almeida Meirelles
• Modalidade de apoio: Auxílio à Pesquisa - Temático