pibic - Universidade Federal do Pará

UNIVERSIDADE FEDERAL DO PARÁ
PRÓ-REITORIA DE PESQUISA E PÓS-GRADUAÇÃO DIRETORIA DE PESQUISA
SIMULATION OF THE AÇAI EXTRACT SOLUBILITY IN CARBON DIOXIDE USING
EQUATION OF STATE
Eduardo Gama Ortiz Menezes (Bolsista PIBIC/Fapespa)[email protected]
Curso de Engenharia Química, Faculdade de Engenharia Química, Instituto de tecnologia (ITEC)
Prof. Dr. Marilena Emmi Araújo (Orientadora) - [email protected]
Curso de Engenharia Química, Faculdade de Engenharia Química, Instituto de tecnologia (ITEC).
ABSTRACT: The Soave-Redlich-Kwong equation of state with the van der Waals mixing rules
with two binary interaction parameters was used to simulate the solubility of the açai extract in carbon
dioxide for the investigated isotherms 3231.5 to 353.15 K at pressures within 150 and 500 bar. Besides
the vegetable oils composition were a complex mixture of triglycerides plus others compounds, the
solubility of the system açai extract/carbon dioxide was predicted considering as a mixture of fatty acids
plus anthocyanins, based on composition published previosly. The results showed that at pressures
below 300 bar, an isobaric increase in temperature decreases the solubility of the extract as an effect of
the decreases density of the carbon dioxide. The isotherms interception point represents a measured of
the effect of the temperature in the solublity as described in the literature. The methodology applied in
this work could be used as a estimating of the highest vegetable oils solubility region in carbon dioxide
using a fatty acid composition model contributing to lower the experimental measured.
Palavras-chave: dióxido de carbono, solubilidade, equação de estado, açai.
Titulo do projeto do orientador: Tecnologia Supercrítica Aplicada: Processos de Separação, Equilíbrio de Fases e
Simulação (CNPq- Edital Universal)
Área: Ciências Agrárias/ Ciência e Tecnologia de Alimentos/ Engenharia de Alimentos