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Title: An in-situ conductometric apparatus for physicochemical characterization of solutions and in-line monitoring of separation processes at elevated temperatures and pressures

Journal Article · · Measurement Science and Technology

Specific conductance and frequency-dependent resistance (impedance) data are widely utilized for understanding the physicochemical characteristics of aqueous and non-aqueous fluids and for evaluating the performance of chemical processes. However, the implementation of such an in-situ probe in high-temperature and high-pressure environments is not trivial. This work provides a description of both the hardware and software associated with implementing a parallel-type in-situ electrochemical sensor. The sensor can be used for in-line monitoring of thermal desalination processes and for impedance measurements in fluids at high temperature and pressure. Further, a comparison between the experimental measurements on the specific conductance in aqueous sodium chloride solutions and the conductance model demonstrate that the methodology yields reasonable agreement with both the model and literature data. A combination of hardware components, a software-based correction for experimental artifacts, and computational fluid dynamics (CFD) calculations used in this work provide a sound basis for implementing such in-situ electrochemical sensors to measure frequency-dependent resistance spectra.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2222614
Report Number(s):
LA-UR--21-29440
Journal Information:
Measurement Science and Technology, Journal Name: Measurement Science and Technology Journal Issue: 5 Vol. 33; ISSN 0957-0233
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (53)

Complex permittivity of sodium chloride solutions at microwave frequencies journal January 2007
Preparation of TiO2 layers on cp-Ti and Ti6Al4V by thermal and anodic oxidation and by sol-gel coating techniques and their characterization journal October 2001
Effect of density on the electrical conductance of aqueous sodium chloride solutions journal February 1975
Electrical conductivity measurements of aqueous sodium chloride solutions to 600�C and 300 MPa journal September 1994
Modeling Thermal Conductivity of Electrolyte Mixtures in Wide Temperature and Pressure Ranges: Seawater and Its Main Components journal January 2012
A New Flow Instrument for Conductance Measurements at Elevated Temperatures and Pressures: Measurements on NaCl(aq) to 458 K and 1.4 MPa journal May 2007
An interpretation for the distance parameter of the Fuoss-Onsager conductance equation in the case of ionic association journal June 1971
Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Correlation algorithms for ionic species and equation of state predictions to 5 kb and 1000°C journal August 1988
Analyzing electrolytic conductivity data by the Fuoss-Justice equation with a programmable calculator journal January 1982
Experimental limitations in impedance spectroscopy:Part V. Apparatus contributions and corrections journal August 1997
Spore-based biosensor to monitor the microbicidal efficacy of gaseous hydrogen peroxide sterilization processes journal May 2018
Corrosion behavior of nickel base alloys, stainless steel and titanium alloy in supercritical water containing chloride, phosphate and oxygen journal August 2015
A revised empirical model to calculate the dynamic viscosity of H2O NaCl fluids at elevated temperatures and pressures (≤1000 °C, ≤500 MPa, 0–100 wt % NaCl) journal February 2017
The system H2O–NaCl. Part I: Correlation formulae for phase relations in temperature–pressure–composition space from 0 to 1000°C, 0 to 5000bar, and 0 to 1 XNaCl journal October 2007
The system H2O–NaCl. Part II: Correlations for molar volume, enthalpy, and isobaric heat capacity from 0 to 1000°C, 1 to 5000bar, and 0 to 1 XNaCl journal October 2007
Electrochemical low-frequency impedance spectroscopy algorithm for diagnostics of PEM fuel cell degradation journal January 2020
Unique fitting of electrochemical impedance spectra by random walk Metropolis Hastings algorithm journal November 2018
Electric impedance of aqueous KCl and NaCl solutions: Salt concentration dependence on components of the equivalent electric circuit journal September 2017
Dielectric relaxation of neodymium chloride in water and in methanol journal June 2020
The separation of grain and grain boundary impedance in thin yttria stabilized zirconia (YSZ) layers journal March 2011
Platinized platinum electrodes journal April 1971
New Apparatus for Conductance Measurements at High Temperatures: Conductance of Aqueous Solutions of LiCl, NaCl, NaBr, and CsBr at 28 MPa and Water Densities from 700 to 260 kg m-3 journal July 1995
THE CONDUCTIVITY OF DILUTE SODIUM CHLORIDE SOLUTIONS UNDER SUPERCRITICAL CONDITIONS1 journal May 1960
Electrical conductances of aqueous sodium chloride solutions from 0 to 800.degree. and at pressures to 4000 bars journal February 1968
The Electrical Conductance of Aqueous Hydrochloric Acid in the Range 300 to 383° journal April 1963
The Electrical Conductivity of Aqueous Solutions at high Temperatures. 1.—Description of the Apparatus. Results with Sodium and Potassium Chloride up to 306°. journal February 1904
Limiting Conductivities and Ion Association Constants of Aqueous NaCl under Hydrothermal Conditions: Experimental Data and Correlations journal August 2012
Tests of Equations for the Electrical Conductance of Electrolyte Mixtures:  Measurements of Association of NaCl (Aq) and Na 2 SO 4 (Aq) at High Temperatures journal December 2000
Multiple Ion Association versus Redissociation in Aqueous NaCl and KCl at High Temperatures journal June 2002
Conductance of Dilute LiCl, NaCl, NaBr, and CsBr Solutions in Supercritical Water Using a Flow Conductance Cell journal August 1997
Accelerated estimation of corrosion rate in supercritical and ultra-supercritical water journal August 2017
Analysis of the tendency for the electronic conductivity to change during alcoholic fermentation journal April 2019
Calculation of the thermodynamic properties of aqueous species at high pressures and temperatures. Effective electrostatic radii, dissociation constants and standard partial molal properties to 1000 °C and 5 kbar journal January 1992
Conductance of electrolyte solutions. A modified expression for its concentration dependence journal January 1969
Influence of electric conductivity management on greenhouse tomato yield and fruit quality journal May 2001
The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use journal June 2002
The Electrical Conductivity of Supercritical Solutions of Sodium Chloride and Water journal February 1954
New International Formulation for the Viscosity of H2O journal June 2009
Electrical conductivity, ion pairing, and ion self-diffusion in aqueous NaCl solutions at elevated temperatures and pressures journal December 2019
A Formulation for the Static Permittivity of Water and Steam at Temperatures from 238 K to 873 K at Pressures up to 1200 MPa, Including Derivatives and Debye–Hückel Coefficients journal July 1997
NaCl aggregation in water at elevated temperatures and pressures: Comparison of classical force fields journal February 2021
Recent developments in electrochemical sensor application and technology—a review journal January 2009
Monitoring of polymer melt processing journal April 2010
Electrode polarization in dielectric measurements: a review journal August 2013
Preliminary experimental study on the electrical impedance analysis forin-situmonitoring of the curing of carbon/epoxy composite material for aeronautical and aerospace structures journal July 2013
Non-contact multi-frequency magnetic induction spectroscopy system for industrial-scale bio-impedance measurement journal February 2015
Experimental System for Electrochemical Studies of Aqueous Corrosion at Temperatures above 300°C journal January 2009
Understanding Artifacts in Impedance Spectroscopy journal November 2014
Determination of Diffusion Coefficients Using Impedance Spectroscopy Data journal January 2018
Comparison of the Conductance Equations of Fuoss-Onsager, Fuoss-Hsia and Pitts with the Data of Bis(2,9-dimethyl-1,10-phenanthroline)Cu(I) Perchlorate journal February 1973
NBS/NRC Steam Tables: Thermodynamic and Transport Properties and Computer Program for Vapor and Liquid States of Water in SI Units journal November 1986
Electrochemical Impedance Spectroscopy and its Applications in Corrosion Research journal December 2009
Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures; revised equations of state for the standard partial molal properties of ions and electrolytes journal January 1988