USING RAMAN SPECTROSCPPY TO CONTROL CARBONATE/BICARBONATE CONCENTRATIONS
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United States of America Patent
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Issued Date -
May 26, 2011
app pub date -
Jul 28, 2009
filing date -
Jul 29, 2008
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Abandoned
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Abstract
An apparatus and method of controlling carbonate/bicarbonate concentrations and ratio in a chemical process having the steps of flowing a carbonate/bicarbonate solution through a measurement cell (202), exposing the solution to laser light of suitable wavelength and power (204); measuring the intensity of the scattered light using Raman spectroscopy (206); calculating the concentration of carbonate and bicarbonate from the intensity of the scattered light (208); and sending the measurement results to a programmable logic controller (210) to be used to control the ratio of carbonate and bicarbonate in the solution through adjusting process parameters. The method is useful in both carbon dioxide absorption processes and carbonate/bicarbonate regeneration processes.
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