Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for measuring pH value of high-temperature high-pressure water solution

A technology of high temperature and high pressure, measurement method, applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve problems such as unknown composition and concentration

Active Publication Date: 2012-12-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] The purpose of the present invention is to provide a method for measuring the pH value of a high-temperature and high-pressure aqueous solution, which converts the potential value measured by a pH sensor in high-temperature water into a pH value, and solves problems such as measuring the pH value of an aqueous high-temperature and high-pressure aqueous solution with unknown components and concentrations

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for measuring pH value of high-temperature high-pressure water solution
  • Method for measuring pH value of high-temperature high-pressure water solution
  • Method for measuring pH value of high-temperature high-pressure water solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Measurement of the pH value of the mixed solution of NaOH and NaCl with three concentrations at 150℃ and 7MPa

[0106] 1. Pump the standard solution 1 (0.01mol / KgNaOH+0.1mol / KgNaCl) into the autoclave, the flow rate is 1ml / min, when the temperature T=150°C and the pressure P=7MPa, measure the YSZ pH sensor in the solution relative to The potential of the reference electrode is E 1 = -0.03876v;

[0107] 2. Pump the standard solution 2 (0.1mol / Kg NaOH+0.1mol / Kg NaCl) into the autoclave, the flow rate is 1ml / min, when the temperature T=150°C and the pressure P=7MPa, measure the YSZ pH sensor in the solution The potential with respect to the reference electrode is E 2 = -0.04775V;

[0108] 3. Three solutions to be tested (0.02mol / Kg NaOH+0.1mol / Kg NaCl; 0.08mol / KgNaOH+0.1mol / Kg NaCl; 0.3mol / Kg NaOH+0.1mol / Kg NaCl) (in order to make the pH measurement result Can be compared with theoretical calculation results and GE commercial pH software calculation results and imagina...

Embodiment 2

[0114] 230℃, 28MPa, 0.01mol / Kg HCl+0.1mol / Kg NaCl solution pH value test

[0115] 1. Pump the standard solution 1 (0.001mol / Kg HCl+0.1mol / Kg NaCl) into the autoclave, the flow rate is 1ml / min, when the temperature T=230°C and the pressure P=28MPa, measure the YSZ pH sensor in the solution The potential with respect to the reference electrode is E 1 =0.186v;

[0116] 2. Pump the standard solution 2 (0.1mol / Kg HCl+0.1mol / Kg NaCl) into the autoclave, the flow rate is 1ml / min, when the temperature T=230°C and the pressure P=28MPa, measure the YSZ pH sensor in the solution The potential with respect to the reference electrode is E 2 =0.311v;

[0117] 3. The solution to be tested is 0.01mol / Kg HCl+0.1mol / Kg NaCl (an imaginary acidic unknown solution to be tested in order to make the pH measurement result can be compared with the theoretical calculation result and the calculation result of GE commercial pH software) into the autoclave , when the flow rate is 1ml / min, the temperat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for measuring the pH value of high temperature high pressure water solution, belonging to the measurement technology of pH value, for resolving the pH value measurement problem on the high temperature high pressure water solution of unknown components and concentration. The measurement method comprises: (1) measuring the potential E1 of a pH sensor in a standard solution 1 relative to a reference electrode; (2) measuring the potential E2 of a pH sensor in a standard pollution 2 relative to a reference electrode; (3) measuring the potential Ex of a pH sensor in an object solution relative to a reference electrode; (4) according to E1, E2, Ex, converting the potential measured by pH sensor in high temperature water into pH value. The measurement method onlyneeds the potentials of temperature, pressure, concentration and pH sensors in solution, to obtain the pH value of an unknown solution at current temperature and pressure. The measurement method can be test the pH value of the water solution whose temperature range is 25 to 300DEG C and solution concentration is lower than 1.0mol / Kg.

Description

technical field [0001] The invention relates to the measurement technology of pH value, in particular to a method for measuring the pH value of high-temperature and high-pressure aqueous solution. Background technique [0002] High-temperature and high-pressure aqueous solution is the most commonly used heat exchange fluid in current nuclear reactors, and it is also the main medium for the next generation of supercritical water-cooled reactors and supercritical water oxidation wastewater treatment. Changes in temperature and pressure (especially when the temperature and pressure exceed the critical value) will cause many properties of the aqueous solution, such as density, dielectric properties and ion product of water, etc. to change ( figure 1 ). Since the pH value of high temperature and high pressure aqueous solution is closely related to the corrosion of equipment materials serving in this environment, the measurement of pH value of aqueous solution under high temperat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416
Inventor 孙华吴欣强韩恩厚
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com