Mid-infrared spectroscopy as a tool for real-time monitoring of ethanol absorption in glycols

Autor(es)

Rodrigues, Kaio C. S. ^[1] ; Veloso, Ivan I. K. ^[1] ; Ribeiro, Marcelo P. A. ^[1] ; Cruz, Antonio J. G. ^[1] ; Badino, Alberto C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Grad Program Chem Engn, CP 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CANADIAN JOURNAL OF CHEMICAL ENGINEERING; v. 99, n. 1, p. 401-409, JAN 2021.
• Citações Web of Science: 0

Resumo

Fast, simple, accurate, and inexpensive methods for obtaining analyte concentration data are desirable in the industrial sector. In the present study, the use of Fourier transform mid-infrared (FT-MIR) spectroscopy, combined with partial least squares (PLS) regression, was investigated as a tool for real-time monitoring of processes of ethanol absorption in glycols. Calibration was performed using simple synthetic samples containing ethanol, water, and monoethylene glycol (MEG) or diethylene glycol (DEG). The PLS models presented excellent performance, with correlation coefficients (R-2) close to unity and root-mean-square errors of cross-validation (RMSECV) and prediction (RMSEP) lower than 2% of the calibration data ranges for both analytes (ethanol and water) in both absorbents (MEG and DEG). The monitoring technique developed has potential to be applied in absorption processes and could also be used in other large-scale unit operations, providing information in real time and enhancing process control. (AU)

• Processo FAPESP: 18/11405-5 - Fermentação Alcoólica Extrativa em Biorreatores Pneumáticos com Arraste de Etanol por CO2 Integrada a Etapas de Recuperação
• Beneficiário: Alberto Colli Badino Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/26854-9 - Estudo do processo de produção e recuperação de etanol: integração dos processos de fermentação extrativa com dióxido de carbono e recuperação em coluna de absorção
• Beneficiário: Kaio César da Silva Rodrigues
• Modalidade de apoio: Bolsas no Brasil - Doutorado