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Displaying records 11 to 20 of 100 records.
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11. Use of the Grand Canonical Transition-Matrix Monte Carlo Method to Model Gas Adsorption in Porous Materials
Topic: Chemical Engineering & Processing
Published: 2/21/2013
Authors: Daniel W Siderius, Vincent K Shen
Abstract: We present grand canonical transition-matrix Monte Carlo (GC-TMMC) as an efficient method for simulating gas adsorption processes, with particular emphasis on subcritical gas adsorption in which capillary phase transitions are present. As in other a ...

12. A Humidity Generator for Temperatures to 200 °C and Pressures to 1.6 MPa
Topic: Chemical Engineering & Processing
Published: 11/30/2012
Authors: D Vega-Maza, W Wyatt Miller, Dean C Ripple, Gregory E Scace
Abstract: We have constructed a new humidity generator that produces gas streams of known moisture content at temperatures from 85 °C to 200 °C, absolute pressures from 0.2 MPa to 1.6 MPa, and relative humidities from 10 % to 90 %. The generator produces a moi ...

13. Kinetics of H atom attack on unsaturated hydrocarbons using spectral uncertainty propagation and minimization techniques
Topic: Chemical Engineering & Processing
Published: 7/2/2012
Authors: David A Sheen, Claudette M. (Claudette) Rosado-Reyes, Wing Tsang
Abstract: Unsaturated hydrocarbons are an important component of hydrocarbon fuels and intermediates in their oxidation. Under rich conditions, H atom attack is one of the principle pathways of the decomposition of these unsaturated compounds. Consequently, it ...

14. State-of-the-Art Comparability of Corrected Emission Spectra-Part II: Peer-toPeer Assessment of Calibration Performance Using Spectral Fluorescence Standards
Topic: Chemical Engineering & Processing
Published: 2/28/2012
Authors: Paul C DeRose, Joanne C Zwinkels, Bernd Ebert
Abstract: The tremendous growth of fluorescence applications in the life and material sciences has proceeded largely without sufficient concern for the reliability and uncertainties related to the characterization and performance validation of fluorescence ins ...

15. Observation of vapor density enhancement of a rare-earth metal-halide in the temperature range relevant to metal-halide lamps
Topic: Chemical Engineering & Processing
Published: 2/22/2012
Authors: John J Curry, E. G Estupinan, W. P. Lapatovich, Albert Henins, S. D. Shastri
Abstract: The total vapor-phase densities of Dy in equilibrium with a DyI$_3$/InI condensate and Tm in equilibrium with a TmI$_3$/TlI condensate have been measured for temperatures between 900 K and 1400 K. The measurements show strong enhancements in rare-ear ...

16. Present Estimates of the Differences Between Thermodynamic Temperatures and the ITS-90
Topic: Chemical Engineering & Processing
Published: 1/29/2011
Authors: Joachim Fischer, M. DePodesta, K. D. Hill, Michael R Moldover, Laurent Pitre, R. Rusby, Peter Steur, Osamu Tamura, R. White, L. Wolber
Abstract: In 2005, the Consultative Committee for Thermometry (CCT) recommended the creation of a Mise en pratique for the definition of the kelvin and envisioned that future versions of the Mise en pratique would recommend values of the differences between ...

17. Microstructure and hydrogen bonding in water-acetonitrile mixtures
Topic: Chemical Engineering & Processing
Published: 11/19/2010
Author: Raymond Dale Mountain
Abstract: The connection between hydrogen bonding between water and acetonitrile in determining the microheterogeneity of the liquid mixture is examined using NPT molecular dynamics simulations. Mixtures for six, rigid, three-site models for acetonitrile and ...

18. The Roles of the Mise en Pratique for the Definition of the Kelvin
Topic: Chemical Engineering & Processing
Published: 10/16/2010
Authors: Dean C Ripple, Richard Davis, Bernd Fellmuth, Joachim Fischer, Graham Machin, Terry Quinn, Peter Steur, Osamu Tamura, D. R White
Abstract: The mise en pratique (,practical realizationŠ) for the definition of the kelvin (MeP-K) was created by the Consultative Committee for Thermometry (CCT) in 2006 to give practitioners of thermometry a guide to the realization of the kelvin, in accord w ...

19. Bilateral Comparison Confirms NIM‰s and NIST‰s Gas Flow Capabilities
Topic: Chemical Engineering & Processing
Published: 10/15/2010
Authors: Aaron N Johnson, CHUNHUI LI
Abstract: The bilateral comparison between NIM and NIST for gas flow was conducted from June 2008 to October 2009. Two critical flow venturis (CFVs) with nominal throat diameters of 10 mm and 20 mm, respectively, were selected as transfer standards. The CFVs w ...

20. Properties for Accurate Gas Flow Measurements
Topic: Chemical Engineering & Processing
Published: 10/15/2010
Author: John D Wright
Abstract: Accurate gas properties are needed to take full advantage of the low uncertainties provided by NIST‰s Gas Flow Calibration Services. If a flowmeter user and NIST use different values for these properties (molecular mass, compressibility, density, vis ...

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