Hydrocarbon gas measurements using nuclear magnetic resonance

Details Hydrocarbon gas measurements using nuclear magnetic resonance Hydrocarbon gas measurements using nuclear magnetic resonance

1990-06-12

1992-06-16

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324300, G01R 3320

Patent

active

051227460

ABSTRACT:
A method of using a transient NMR response signal to determine physical properties of gases, specifically calorific content and compressibility, while the gas is in-line. The amplitude of the free induction decay signal, as well as relaxation time constants, are used to identify components of a gas mixture and to determine relative composition. This data is then used to calculate calorific value and compressibility as a function of the hydrogen content of components of the gas rather than as a function of the total hydrogen content of the gas.

REFERENCES:
patent: 4461996 (1984-07-01), Kwon
patent: 4531093 (1985-07-01), Rollwitz et al.
patent: 4638251 (1987-01-01), King
patent: 4656422 (1987-04-01), Vail, III et al.
patent: 4701705 (1987-10-01), Rollwitz
patent: 4940942 (1990-07-01), Bartuska
King, Nicholls and Rollwitz, "NMR Measurement of Gas Energy, Compressibility and Density", Electronics and Physics Dept., Instrumentation & Space Research Div., Southwest Research Institute (presented in Jun., 1988, seminar).

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