Aplicación de la metodología de superficie de respuesta en un proceso de absorción del CO₂ de un biogás en una solución alcalina

In the present study a 2³ factorial design extended to central composite has been used to analyse the effects of a number of variables including the [CO₃⁼/HCO₃^-] ratio, initial gas pressure and gas-liquid system temperature on the absorption of CO₂ into a sodium carbonate/bicarbonate alkaline solution using a simulated biogas as the gas mixture sample. A response surface analysis using a second order model has shown that the concentration ratio has a significant influence on the carbon dioxide removal process. The model has been statistically validated (analysis of variance) and explained 98.41% of the variability of the CO₂ concentration (v/v) change in the simulated biogas. The maximum amount of CO₂ removed has been 62.86% during a contact time of sixty minutes.