Equilibrium Measurements of the NH 3 -CO 2 -H 2 O System: Speciation Based on Raman Spectroscopy and Multivariate Modeling

Liquid speciation is important for reliable process design and optimization of gas-liquid absorption process. Liquid-phase speciation methods are currently available, although they involve tedious and time-consuming laboratory work. Raman spectroscopy is well suited for in situ monitoring of aqueous...

Full description

Saved in:
Bibliographic Details
Published in:Journal of chemistry 2017, Vol.2017, p.1-13
Main Authors: Halstensen, Maths, Jilvero, Henrik, Jinadasa, Wathsala N., Jens, Klaus-J.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Liquid speciation is important for reliable process design and optimization of gas-liquid absorption process. Liquid-phase speciation methods are currently available, although they involve tedious and time-consuming laboratory work. Raman spectroscopy is well suited for in situ monitoring of aqueous chemical reactions. Here, we report on the development of a method for speciation of the CO 2 -NH 3 -H 2 O equilibrium using Raman spectroscopy and PLS-R modeling. The quantification methodology presented here offers a novel approach to provide rapid and reliable predictions of the carbon distribution of the CO 2 -NH 3 -H 2 O system, which may be used for process control and optimization. Validation of the reported speciation method which is based on independent, known, NH 3 -CO 2 -H 2 O solutions shows estimated prediction uncertainties for carbonate, bicarbonate, and carbamate of 6.45 mmol/kg H 2 O, 34.39 mmol/kg H 2 O, and 100.9 mmol/kg H 2 O, respectively.
ISSN:2090-9063
2090-9071
DOI:10.1155/2017/7590506