Raman spectra method for measuring viscosity of supercritical fluids

Qinyi Li, Xing Zhang

Research output: Contribution to journalArticle

Abstract

Viscosity measurement of supercritical fluids is very important for industry applications. We developed a non-contact optical method for determining supercritical fluids' viscosity based on the pressure dependence of fluids' Raman spectra and Poiseuille flow principles. Firstly, we investigated the pressure dependence of Raman spectra for methane mixtures and carbon dioxide mixtures. We can use Raman spectra to accurately obtain the total pressure of methane mixtures, but the Raman spectra method for determining the total pressure of carbon dioxide mixtures needs further investigation. Further, we theoretically designed the measurement system and analyzed the sensitivity of the method. The measurement system consists of gas tanks, a pressure-controlling high pressure syringe pump, a temperature controlling plate, a capillary tube array plate and a Raman spectrometer. The pressures vary significantly between the inlet and outlet of the capillary tube array and this method is very sensitive for measuring viscosity of methane mixtures.

Original languageEnglish
Pages (from-to)757-761
Number of pages5
JournalKung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
Volume35
Issue number4
Publication statusPublished - Jan 1 2014

Fingerprint

Supercritical fluids
supercritical fluids
Raman scattering
Viscosity
viscosity
Raman spectra
capillary tubes
Methane
methane
pressure dependence
Capillary tubes
carbon dioxide
Carbon Dioxide
syringes
Carbon dioxide
outlets
dioxides
laminar flow
Syringes
Viscosity measurement

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Raman spectra method for measuring viscosity of supercritical fluids. / Li, Qinyi; Zhang, Xing.

In: Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics, Vol. 35, No. 4, 01.01.2014, p. 757-761.

Research output: Contribution to journalArticle

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