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Your search keyword '"Rashtchian, D."' showing total 14 results
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14 results on '"Rashtchian, D."'

7. Underground reservoir identification using generalized wellbore data

Author

Mansoori, M., Dankers, A.G., Hof, Van den, P.M.J., Jansen, J.D., Rashtchian, D., Mansoori, M., Dankers, A.G., Hof, Van den, P.M.J., Jansen, J.D., and Rashtchian, D.

Abstract

We present a novel method for estimating physical properties of an underground hydrocarbon reservoir, on the basis of generally measured wellbore ow rate and pressure signals at the bottom of a producing well. The method uses instrumental variable-based system identification techniques to solve for a closed-loop errors-in-variables problem. It is different from the conventional methods as it allows the instrumental variable signal to be correlated with the input and output signals' noise. This property increases the number of possible candidates to be used as the instrumental variable signal. The application of the proposed method has been investigated on a synthetic case study.

Published
2015

13. Predictive models for permeability and diffusivity of CH4 through imidazolium-based supported ionic liquid membranes

Author

Adibi, M., Barghi, S.H., and Rashtchian, D.

Subjects
*PREDICTION models, *PERMEABILITY, *METHANE, *IONIC liquids, *IMIDAZOLES, *EXPERIMENTAL design, *MEMBRANE separation
Abstract

Abstract: Experimental permeability and diffusivity values for CO2 and CH4 through imidazolium-based ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([hmim][Tf2N]) were determined in the temperature range of 300–320K using temperature correction factor defined in our previous study. According to literature, experimental values of permeability and diffusivity obtained in this study for CO2 in [hmim][Tf2N], showed good agreement with predictive models reported by other researchers. In addition, experimental values of permeability and diffusivity for CH4 in [hmim][Tf2N] as a function of pressure have been reported in this study. Considering the results of present study and those of our previous study on another imidazolium-based ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), predictive models for CH4 permeability and diffusivity through this group of ionic liquids were developed. [Copyright &y& Elsevier]

Published
2011
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14. An experimental study on permeability, diffusivity, and selectivity of CO2 and CH4 through [bmim][PF6] ionic liquid supported on an alumina membrane: Investigation of temperature fluctuations effects

Author

Barghi, S.H., Adibi, M., and Rashtchian, D.

Subjects
*SEPARATION (Technology), *PERMEABILITY, *IONIC liquids, *ALUMINUM oxide, *ARTIFICIAL membranes, *CARBON dioxide, *METHANE, *TEMPERATURE effect
Abstract

Abstract: In order to define a new temperature correction factor in this study, accurate experimental values were presented for permeability and diffusivity of carbon dioxide and methane in imidazolium-based room temperature ionic liquid: [bmim][PF6] (1-butyl-3-methylimidazolium hexafluorophosphate) immobilized on an inorganic membrane support. Results were presented as a function of temperature and pressure for temperatures within 300–320K and pressures below 50kPa. According to the literature, experimental values of permeability and diffusivity for CH4 in [bmim][PF6] vs. temperature are reported for the first time in this study. Results obtained for CO2 permeability revealed good agreement with data reported by other researchers. [ABSTRACT FROM AUTHOR]

Published
2010
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