The Experts below are selected from a list of 150 Experts worldwide ranked by ideXlab platform
Vincent G Anicich - One of the best experts on this subject based on the ideXlab platform.
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evaluated bimolecular ion Molecule Gas phase kinetics of positive ions for use in modeling planetary atmospheres cometary comae and interstellar clouds
Journal of Physical and Chemical Reference Data, 1993Co-Authors: Vincent G AnicichAbstract:Recommendations of reaction rate coefficients and product distributions for bimolecular positive ion‐Molecule reactions of importance in planetary atmospheres, cometary comae, and interstellar clouds are presented. Two publications Anicich and Huntress, 1986, Ap. J. Supplement Series 62, 553 and Anicich, 1993, Ap. J. Supplement Series 84, 215 served as the basis for this evaluation, which covers the literature from 1965 through 1991 with some additional citations missed in the original surveys.
R. C. Nwokeoma - One of the best experts on this subject based on the ideXlab platform.
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Gas hydrates and clathrates: Flow assurance, environmental and economic perspectives and the Nigerian liquified natural Gas project
Journal of Petroleum Science and Engineering, 2007Co-Authors: B. C. Gbaruko, J. C. Igwe, P. N. Gbaruko, R. C. NwokeomaAbstract:Gas hydrates are nonstoichiometric crystalline compounds that belong to the inclusion group known as clathrates. They occur when water Molecules attach themselves together through hydrogen bonding and form cavities which can be occupied by a single Gas or volatile liquid Molecule. Gas hydrates, asphaltenes and waxes are three major threats to flow assurance that must be well assessed by design team uptime. Gas hydrates are also looked upon as a future energy source and as a potential climate hazard. The purpose of this review is to show the chemistry and mechanism of Gas hydrate formation, the problems they pose, especially to flow assurance, their system implications, their environmental and economic perspectives with respect to their prospects as storage and transport alternative to the liquefied natural Gas technology.
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Gas hydrates and clathrates: Flow assurance, environmental and economic perspectives and the Nigerian liquified natural Gas project
Journal of Petroleum Science and Engineering, 2007Co-Authors: B. C. Gbaruko, J. C. Igwe, P. N. Gbaruko, R. C. NwokeomaAbstract:Gas hydrates are nonstoichiometric crystalline compounds that belong to the inclusion group known as clathrates. They occur when water Molecules attach themselves together through hydrogen bonding and form cavities which can be occupied by a single Gas or volatile liquid Molecule. Gas hydrates, asphaltenes and waxes are three major threats to flow assurance that must be well assessed by design team uptime. Gas hydrates are also looked upon as a future energy source and as a potential climate hazard. The purpose of this review is to show the chemistry and mechanism of Gas hydrate formation, the problems they pose, especially to flow assurance, their system implications, their environmental and economic perspectives with respect to their prospects as storage and transport alternative to the liquefied natural Gas technology. © 2006 Elsevier B.V. All rights reserved.
J Durand - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of silicon carbonitride films by plasma enhanced chemical vapor deposition pecvd using bis dimethylamino dimethylsilane bdmadms as membrane for a small Molecule Gas separation
Applied Surface Science, 2010Co-Authors: W Kafrouni, V Rouessac, Anne Julbe, J DurandAbstract:Abstract Silicon carbonitride thin films have been deposited by plasma enhanced chemical vapor deposition (PECVD) from bis(dimethylamino)dimethylsilane (BDMADMS) as a function of X = (BDMADMS/(BDMADMS + NH3)) between 0.1 and 1, and plasma power P (W) between 100 and 400 W. The microstructure of obtained materials has been studied by SEM, FTIR, EDS, ellipsometrie, and contact angle of water measurements. The structure of the materials is strongly depended on plasma parameters; we can pass from a material rich in carbon to a material rich in nitrogen. Single Gas permeation tests have been carried out and we have obtained a helium permeance of about 10−7 mol m−2 s−1 Pa−1 and ideal selectivity of helium over nitrogen of about 20.
B. C. Gbaruko - One of the best experts on this subject based on the ideXlab platform.
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Gas hydrates and clathrates: Flow assurance, environmental and economic perspectives and the Nigerian liquified natural Gas project
Journal of Petroleum Science and Engineering, 2007Co-Authors: B. C. Gbaruko, J. C. Igwe, P. N. Gbaruko, R. C. NwokeomaAbstract:Gas hydrates are nonstoichiometric crystalline compounds that belong to the inclusion group known as clathrates. They occur when water Molecules attach themselves together through hydrogen bonding and form cavities which can be occupied by a single Gas or volatile liquid Molecule. Gas hydrates, asphaltenes and waxes are three major threats to flow assurance that must be well assessed by design team uptime. Gas hydrates are also looked upon as a future energy source and as a potential climate hazard. The purpose of this review is to show the chemistry and mechanism of Gas hydrate formation, the problems they pose, especially to flow assurance, their system implications, their environmental and economic perspectives with respect to their prospects as storage and transport alternative to the liquefied natural Gas technology.
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Gas hydrates and clathrates: Flow assurance, environmental and economic perspectives and the Nigerian liquified natural Gas project
Journal of Petroleum Science and Engineering, 2007Co-Authors: B. C. Gbaruko, J. C. Igwe, P. N. Gbaruko, R. C. NwokeomaAbstract:Gas hydrates are nonstoichiometric crystalline compounds that belong to the inclusion group known as clathrates. They occur when water Molecules attach themselves together through hydrogen bonding and form cavities which can be occupied by a single Gas or volatile liquid Molecule. Gas hydrates, asphaltenes and waxes are three major threats to flow assurance that must be well assessed by design team uptime. Gas hydrates are also looked upon as a future energy source and as a potential climate hazard. The purpose of this review is to show the chemistry and mechanism of Gas hydrate formation, the problems they pose, especially to flow assurance, their system implications, their environmental and economic perspectives with respect to their prospects as storage and transport alternative to the liquefied natural Gas technology. © 2006 Elsevier B.V. All rights reserved.
Bingjun Xu - One of the best experts on this subject based on the ideXlab platform.
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The Effect of Adsorbed Molecule Gas-Phase Deprotonation Enthalpy on Ion Exchange in Sodium Exchanged Zeolites: An In Situ FTIR Investigation
Topics in Catalysis, 2015Co-Authors: Brian Murphy, Mark E. Davis, Bingjun XuAbstract:Molecular-level understanding of the interactions between reactants and the surface of solid catalysts is of importance to the rational design of catalysts. Here, in situ transmission Fourier transform infrared spectroscopy is employed to investigate the ion exchange between the acidic hydrogen in organic Molecules that have been adsorbed from the Gas phase and sodium cations in zeolites. Organic compounds with functional groups common among key biomass-derived compounds are used as probe Molecules. We demonstrate that ion exchange between acidic hydrogen in organic Molecules and the sodium cations in zeolites with the FAU topology produces Brønsted acid sites and the corresponding adsorbed salt species by identifying signature spectroscopic bands. Furthermore, the Gas-phase deprotonation enthalpy (GPDE) of the organic compounds is identified as a key descriptor in determining the feasibility and extent of the exchange process. Molecules with GPDE below 1462 kJ/mol, e.g., m -cresol (1462 kJ/mol), propanoic acid (1454), acetic acid (1457), acrylic acid (1440) and trifluoroacetic acid (1357), show clear vibrational bands for Brønsted acid sites and the corresponding sodium salts, while Molecules with higher GPDE, such as trifluoroethanol (1513), ethanol (1586), and water (1622) do not. These data indicate that the degree of dissociation of the acidic hydrogen is a key element in the ion exchange. The generality of this process in zeolites is established by the observation of similar results on zeolites with differing topologies (FAU, MFI, *BEA, and MOR).