Journal article

Absorption of carbon dioxide into aqueous potassium carbonate promoted by boric acid

Ujjal K Ghosh, Sandra E Kentish, Geoff W Stevens, J Gale (ed.), H Herzog (ed.), J Braitsch (ed.)

GREENHOUSE GAS CONTROL TECHNOLOGIES 9 | ELSEVIER SCIENCE BV | Published : 2009

Abstract

The absorption of carbon dioxide with alkanolamine or potassium carbonate solvents has gained widespre ad acceptance for the removal of CO2 from natural gas and H 2. However, alkanolamine solutions are prone to oxidative degradation at high temperature. The main advantages of potassium carbonate solution for CO2 removal are the high chemical solubility of CO2 in the carbonate/ bicarbonate system, low solvent costs and the low energy requirement for solvent regeneration. The major challenge concerning absorption of CO2 into aqueous solutions of potassium carbonate is a relatively slow rate of reaction in the liquid phase causing low mass transfer rates. It is often advantageous to add a promo..

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