Publication Date:
2013-04-05
Description:
Amine solutions were applied in carbon dioxide removal from a model mixture of biogas, carried out in a loop reactor system. In addition, the effect of CO 2 absorption acceleration in the presence of piperazine was confirmed and quantified, relating the obtained CO 2 loading with the piperazine concentration. Further, the interactions of CO 2 and water in aqueous amine solutions were discussed. The obtained acid gas loadings were accurately described taking into account the effect of the dissolved CO 2 on the equilibrium constant. A logarithmic absorption isotherm that follows from such considerations and a saturation-type isotherm were compared. In describing the experimental data, advantages and disadvantages of both approaches are discussed. The absorption performance of piperazine-containing amine solutions to be used for biogas upgrading was investigated in terms of CO 2 capture. The suggested approach was utilized to describe the non-ideality of the absorption isotherms and proved to be suitable also for data reported by other research groups.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Permalink