Mohamed M. Elbaccouch

University of Central Florida

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Ali T‐Raissi

University of Central Florida

J. Richard Elliott

University of Akron

Satyajit Shukla

National Institute for Interdisciplinary Science and Technology

Sudipta Seal

University of Central Florida

Nahid Mohajeri

University College London

Christine Grant

North Carolina State University

Ruben G. Carbonell

National Institute for Innovation in Manufacturing Biopharmaceuticals

Valeriy I. Bondar

North Carolina State University

Michaël Raymond

Université de Montréal

Youting Wu

Nanjing University

Cooperative Institutions

University of Central Florida

North Carolina State University

Electric Vehicle Transportation Center

University of North Carolina at Chapel Hill

Nanjing University

Advanced Energy (United States)

North Central State College

University of California, Davis

University of Akron

Materials Processing (United States)

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On-board removal of CO and other impurities in hydrogen for PEM fuel cell applications

Journal of Power Sources (2006)

Cunping Huang Ruichun Jiang Mohamed M. Elbaccouch Nazim Muradov James M. Fenton

Hydrogen purifier

10.1016/j.jpowsour.2006.06.097

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Citations (29)

Phase Equilibrium Behavior of the Binary Systems CO₂ + Nonadecane and CO₂ + Soysolv and the Ternary System CO₂ + Soysolv + Quaternary Ammonium Chloride Surfactant

Journal of Chemical & Engineering Data (2003)

Mohamed M. Elbaccouch Valeriy I. Bondar Ruben G. Carbonell Christine Grant

Liquid phase and molar volume data were measured for the binary system CO2 + soysolv at (298.15, 313.15, 323.15, 333.15, and 343.15) K and the ternary system CO2 + soysolv + quaternary ammonium chloride surfactant at (298.15, 313.15, and 333.15) K, where the composition of soysolv to the surfactant is 99:1 wt % and 80:20 wt % on a CO2-free basis. Data were collected stoichiometrically with a high-pressure Pyrex glass cell, where no sampling or chromatographic equipment is required. The accuracy of the experimental apparatus was tested with phase equilibrium measurements for the system CO2 + nonadecane at 313.15 K. A pressure-decay technique was used to calculate the mass of CO2 loaded into the equilibrium section of the apparatus, and its accuracy was verified with a blank nitrogen experiment. The generated data show that CO2 modified soysolv is an effective transport medium for the quaternary ammonium chloride surfactant.

Stoichiometry

Ternary numeral system

Ammonium chloride

10.1021/je020201d

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Citations (7)

High-Pressure Vapor−Liquid Equilibrium for Dimethyl Ether + 2-Propanol and Dimethyl Ether + 2-Propanol + Water

Journal of Chemical & Engineering Data (2001)

Mohamed M. Elbaccouch J. Richard Elliott

We report vapor−liquid equilibrium data for the system dimethyl ether (DME) + 2-propanol at 323.45, 348.45, and 373.45 K and for the system dimethyl ether + 2-propanol + water at 323.25, 348.05, and 373.15 K. The experimental data are correlated using the Peng−Robinson equation of state and the Elliott−Suresh−Donohue equation of state. We explore the properties of dimethyl ether in the ternary system as a near-critical or supercritical solvent or cosolvent. The data for the dimethyl ether solutions are compared to literature data for ternary systems containing propylene or propane + 2-propanol + water. Dimethyl ether exhibits relatively higher solubility in the aqueous phase, leading to enhanced volatility of water at relatively low pressures compared to the case for propane. On the other hand, dimethyl ether also becomes completely soluble in the aqueous solution at relatively low pressures, precluding two-phase mass transfer under certain conditions.

Dimethyl ether

Propanol

Propane

Ternary numeral system

10.1021/je000317e

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Citations (8)

Microstructural analysis of doped-strontium cerate thin film membranes fabricated via polymer precursor technique

Solid State Ionics (2006)

Mohamed M. Elbaccouch Satyajit Shukla Nahid Mohajeri Sudipta Seal Ali T‐Raissi

Spin Coating

10.1016/j.ssi.2006.10.026

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Citations (7)

Hydrogen Flux in Terbium Doped Strontium Cerate Membrane

Ceramic engineering and science proceedings (2008)

Mohamed M. Elbaccouch Ali T‐Raissi

Hydrogen production membranes of SeCe0.95Tb0.05O3.δ are synthesized using the liquid-phase method. The membranes are of perovskite-type structure with mixed ionic-electronic conductivities. The membranes are dense providing 100% hydrogen selectivity. Hydrogen permeability is studied as a function of temperature, hydrogen partial pressure, hydrogen dry conditions, and water vapor pressure. Also, the influence of nickel deposition on hydrogen flux is evaluated.

Terbium

Partial pressure

10.1002/9780470291337.ch12

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Effect of Temperature and Spin-Coating Cycles on Microstructure Evolution for Tb-Substituted SrCeO3 Thin Membrane Films

Ceramic engineering and science proceedings (2008)

Satyajit Shukla Mohamed M. Elbaccouch Sudipta Seal Ali T‐Raissi

Ceramic oxides with perovskite structures (A 2+ B ++ O 3) have been receiving considerable attention in the solid-state electrochemical systems, such as the development of solid oxide fuel cells (SOFCs), gas sensors, and hydrogen (H2) permeable membranes. The goal of this investigation is to process a terbium-doped strontium cerate (SrCe0.95Tb0.05O3.δ) (SCT) thin membrane films by spin-coating using ethylene glycol-based polymeric precursor. Continuous and dense SrCe0.95Tb0.05O3-δ membrane thin films with neither pin-holes nor cracks are reported. The thicknesses of the membrane films are within the range of ∼ 200 nm—2 μrn For a single spin-coating cycle, the membrane film (200 nm thick) appears to be discontinues. However, the membrane films are dens for multiple spin-coating cycles. The polymeric precursor and the microstructure of the SrCe0.95Tb0.05O3-δ membranes are characterized using scanning electron microscopy (SEM), focused ion-beam (FIB) microscopy, and x-ray diffraction (XRD). This work reveals that good film quality with uniform texture and homogeneous structure can be produced via spin-coating technique as a function of spin-coating cycles and processing temperature. Also, surface morphology and grain size strongly depend on sintering temperature with even grain size distribution for each sintering temperature. The flexibility of the present process approach demonstrates the capability of precisely controlling the thickness of the ceramic membrane films within a sub-micron range.

Spin Coating

10.1002/9780470291320.ch27

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Quartz Crystal Microbalance (QCM) in High-Pressure Carbon Dioxide (CO₂): Experimental Aspects of QCM Theory and CO₂ Adsorption

Langmuir (2004)

Youting Wu Paa-Joe Akoto-Ampaw Mohamed M. Elbaccouch Michael L. Hurrey Scott L. Wallen

The quartz crystal microbalance (QCM) technique has been developed into a powerful tool for the study of solid-fluid interfaces. This study focuses on the applications of QCM in high-pressure carbon dioxide (CO2) systems. Frequency responses of six QCM crystals with different electrode materials (silver or gold) and roughness values were determined in helium, nitrogen, and carbon dioxide at 35-40 degrees C and at elevated pressures up to 3200 psi. The goal is to experimentally examine the applicability of the traditional QCM theory in high-pressure systems and determine the adsorption of CO2 on the metal surfaces. A new QCM calculation approach was formulated to consider the surface roughness contribution to the frequency shift. It was found that the frequency-roughness correlation factor, Cr, in the new model was critical to the accurate calculation of mass changes on the crystal surface. Experiments and calculations demonstrated that the adsorption (or condensation) of gaseous and supercritical CO2 onto the silver and gold surfaces was as high as 3.6 microg cm(-2) at 40 degrees C when the CO2 densities are lower than 0.85 g cm(-3). The utilization of QCM crystals with different roughness in determining the adsorption of CO2 is also discussed.

Quartz Crystal Microbalance

Supercritical Carbon Dioxide

Crystal (programming language)

Nitrogen dioxide

10.1021/la035502f

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Citations (65)

High-Pressure Vapor−Liquid Equilibrium for Dimethyl Ether + Ethanol and Dimethyl Ether + Ethanol + Water

Journal of Chemical & Engineering Data (2000)

Mohamed M. Elbaccouch J. Richard Elliott

The first part of this paper is a review of experimental methods and the high-pressure phase behavior of dimethyl ether systems for which data have been published between 1932 and 1999. For the systems investigated, the references, temperatures, pressures, cell volumes, and experimental procedures are reported. The second part of this paper is high-pressure vapor−liquid equilibrium (VLE) data for the systems dimethyl ether (DME) + ethanol at (332.95, 353.25, and 373.15) K and dimethyl ether + ethanol + water at (333.55, 353.55, and 373.65) K. The experimental data are correlated using the Elliott−Suresh−Donohue (ESD-EOS) and Peng Robinson (PR-EOS) equations of state.

Dimethyl ether

Vapor–liquid equilibrium

10.1021/je000109m

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Citations (17)

High-Pressure Vapor−Liquid Equilibrium for R-22 + Ethanol and R-22 + Ethanol + Water

Journal of Chemical & Engineering Data (2000)

Mohamed M. Elbaccouch Michaël Raymond J. Richard Elliott

High-pressure vapor−liquid equilibrium (VLE) data for the systems CO2 + methanol at 313.05 K, CO2 + ethanol at 323.55, 325.15, and 333.35 K, R-22 (chlorodifluoromethane) + ethanol at 343.25, 361.45, and 382.45 K, and R-22 + ethanol + water at 351.55, 362.65, and 371.85 K are obtained using a circulation-type VLE apparatus. The apparatus is tested with measurements of the CO2 + methanol and CO2 + ethanol systems. The experimental data are correlated using the Peng−Robinson and Elliott−Suresh−Donohue equations of state.

Vapor–liquid equilibrium

10.1021/je990136g

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Citations (22)

Technical Paper Session I-B - The Prospect of producing Breathing Oxygen, Pure Hydrogen and propellants from the Martian Atmosphere

Clovis A. Linkous Mohamed M. Elbaccouch

Atmosphere of Mars

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