A5083410170- Phase Equilibria and Thermodynamics
- Carbon Dioxide Capture Technologies
- Enhanced Oil Recovery Techniques
- Polymer Foaming and Composites
- Carbon dioxide utilization in catalysis
- Thermodynamic properties of mixtures
- Hydraulic Fracturing and Reservoir Analysis
- Membrane Separation and Gas Transport
- CO2 Sequestration and Geologic Interactions
- Hydrocarbon exploration and reservoir analysis
- Chemical Thermodynamics and Molecular Structure
- Petroleum Processing and Analysis
- Ionic liquids properties and applications
- Catalysts for Methane Reforming
- Catalytic Processes in Materials Science
- Reservoir Engineering and Simulation Methods
- Catalysis and Hydrodesulfurization Studies
- Catalysis and Oxidation Reactions
- Methane Hydrates and Related Phenomena
- biodegradable polymer synthesis and properties
- Process Optimization and Integration
- Crystallization and Solubility Studies
- Industrial Gas Emission Control
- Surfactants and Colloidal Systems
- Drilling and Well Engineering
University of Pittsburgh
2015-2024
National Energy Technology Laboratory
2010-2021
University of Petroleum
2012
Yale University
2000-2009
Clemson University
2002-2009
United States Department of Energy
2007-2008
Chevron (United States)
2008
Carnegie Mellon University
2007
Auburn University
2005-2006
Oak Ridge Associated Universities
2003
Abstract The high‐temperature rate of reaction the homogeneous, reverse water–gas shift (rWGSR) has been evaluated in quartz reactors with rapid feed preheating under both low‐ and high‐pressure conditions. form power‐law expression was consistent Bradford mechanism. Arrhenius expressions for constant, corresponding to empty reactor, were very good agreement low‐pressure results Graven Long, but yielded constants roughly four times greater than those obtained our packed reactor reported by...
The reference Henry's constant was determined from 110 solubility data found in the literature for CO2/H2O system over a temperature range of 298 to 523 K and pressure 3.40 72.41 MPa. Since Krichevsfcy-llinskaya equation used model system, correlation A parameter also developed. In addition Krichevsky-Ilinskaya equation, another two-parameter carbon dioxide water obtained by using Krichevsky-Kasarnovsky equation. partial molar volume at infinite dilution were treated as adjustable...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicroemulsions in near-critical and supercritical carbon dioxideT. A. Hoefling, R. M. Enick, E. J. BeckmanCite this: Phys. Chem. 1991, 95, 19, 7127–7129Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published inissue 1 September 1991https://pubs.acs.org/doi/10.1021/j100172a006https://doi.org/10.1021/j100172a006research-articleACS PublicationsRequest reuse permissionsArticle...
Compounds with strong thermodynamic affinity for carbon dioxide (CO(2)) have been designed and synthesized that dissolve in CO(2), then associate to form gels. Upon removal of the these gels produced free-standing foams cells an average diameter smaller than 1 micrometer a bulk density reduction 97 percent relative parent material.
Abstract The kinetics of the high‐temperature (1070–1134 K), low‐ and high‐pressure gas‐phase forward water–gas shift reaction (fWGSR) were evaluated in an empty quartz reactor a packed with particles. power‐law expression for rate was consistent Bradford mechanism invariant respect to pressure. experimental constant lower than that published by Graven Long, slightly higher estimates obtained using derived from conjunction values constants GRI database. Similar experiments conducted composed...
Wrapping up water: Two non-fluorinated CO2-philic surfactants are used to generate water in carbon dioxide microemulsion dispersions. Detailed analyses of high-pressure small-angle neutron scattering data provide evidence for formation spherical D2O nanodroplets (red), stabilized by surfactant interfacial monolayers (lines), and dispersed CO2 (yellow the schematic length density (sld) profile). Supporting information this article is available on WWW under...
The cloud point curves of a series oxygen-containing polymers in CO2 were measured to attempt deduce the effect oxygen functional groups within polymer on polymer/CO2 phase behavior. addition an ether hydrocarbon polymer, either backbone or side chain, enhances "CO2-philicity" by providing sites for specific interactions with as well enhancing entropy mixing creating more flexible chains higher free volume. Ab initio calculations show that both and ester oxygens provide very attractive...
Summary Several commercially available and a few experimental, nonionic surfactants were identified that are capable of dissolving in carbon dioxide (CO2) dilute concentration at typical minimum- miscibility-pressure (MMP) conditions and, upon mixing with brine high-pressure windowed cell, stabilizing CO2-in-brine foams. These slightly CO2-soluble, water-soluble include branched alkylphenol ethoxylates, alkyl fatty-acid-based surfactant, predominantly linear ethoxylated alcohol. Many the...
Geologic carbon storage (GCS) is a rapidly evolving technology with the potential to reduce environmental impact of fossil fuel usage. Saline aquifers, which comprise sandstone matrix brine contained in pores, make up much pore space available for CO2 United States. When injected saline however, capillary fingering occurs, and only small percentage filled CO2. This effect due low viscosity CO2, roughly ten times less viscous than brine. To address this problem, we tested ability inexpensive,...
Copolymers of a fluorinated acrylate and styrene were synthesized to enhance the viscosity liquid carbon dioxide. The phase behavior mixtures these polymers with dioxide was measured at 295 K pressures from 6.70 48.28 MPa. Miscibility decreased decrease in content increased as molecular weight increased. These also found significantly dioxide, by factor ca. 5 400 concentrations 1 wt %. optimal composition for enhancement 29 mol % styrene−71 fluoroacrylate.
The impact of various Lewis bases on the miscibility siloxane polymers in CO2 was investigated using both ab initio calculations and experimental phase behavior studies. A series side-chain functional silicones were synthesized containing side chain, their compared at 295 K. Calculations showed that interactions between ethers (either a dialkyl ether or oxygen an ester group) should be as favorable carbonyl oxygen. Indeed, results seemed to support this, ether-functional exhibited pressures...
Nanoparticles of a fluoropolymer, which is soluble in supercritical carbon dioxide, can be recovered from liquid solvent after rapid expansion process (see scheme). with an average diameter less than 50 nm were initially obtained, however many strategies led to aggregation and the formation agglomerates. Sodium dodecyl sulfate was found most effective stabilizing polymeric nanoparticles aqueous suspension.
A new approach to thicken dense liquid CO(2) is described using the principles of self-assembly custom-made compatible fluorinated dichain surfactants. Solutions surfactants in have been investigated by high-pressure phase behavior, small-angle neutron scattering (HP-SANS) and falling cylinder viscosity experiments. The results show that it possible control surfactant aggregation generate long, thin reversed micellar rods CO(2), which at 10 wt % can lead enhancements up 90% compared pure...