Absorption of Carbon Dioxide into Potassium Hydroxide: Preliminary Study for its Application into Liquid Scintillation Counting Procedure

Abstract

This preliminary study presents a theoretical and experimental investigation on the absorption of CO2 into KOH solution. The study provides variation of KOH concentrations at 1, 2, 3, 4, and 5 N. The value of pH was observed for each increment of sample volume. The absorbed CO2 was measured by applying titration. The amounts of CO2 resulted from every provided KOH concentration were respectively 0.0075, 0.0075, 0.0232, 0.0305, and 0.0395 mol. The results reveal an increase in absorbed CO2 with each increment of KOH concentration. The absorption efficiency values of each KOH concentration were 0.3750, 0.4000, 0.3861, 0.3813, and 0.3950 mol total CO2/mol KOH, respectively. The difference values of experimental and theoretical absorbed CO2 may be caused by the formation of other compounds.

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“…Mourad et al experimented with different effects on CO 2 absorption, such as CO 2 inlet concentration, KOH concentration, temperature, gas flow rate, pressure, and found that KOH concentration did not influence CO 2 absorption [68]. However, Firman et al found different results from their experimental investigation, and their results revealed that an increment occurred in CO 2 absorption when KOH concentration was increased [69].…”

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“…Furthermore, the sample was added with HCl 10% to produce CO2 gas. Nitrogen gas released from nitrogen cylinder was used to carry CO2 gas [26] through AgNO3 to absorb HCl gas [10,27] and silica gel to absorb water [28] and CO2 absorber as KOH [27,29]. The reaction was as follows [26]:…”