Abstract

MUNOZ SIERRA, JULIÁN DAVID; CAMARGO TRILLOS, DIEGO ALEJANDRO  and  GALLEGO SUAREZ, DARÍO. RESPONSE SURFACE METHODOLOGY APLICATION IN A CO₂ ABSORPTION PROCESS FROM BIOGAS INTO AN ALKALINE SOLUTION. Dyna rev.fac.nac.minas [online]. 2009, vol.76, n.159, pp.135-144. ISSN 0012-7353.

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.

Keywords : response surface; experimental design; CO₂ absorption; alkaline solution; analysis of variance.

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