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You searched on: Topic Area: Chemical Engineering Processing

Displaying records 31 to 40 of 102 records.
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31. Reference measurements of Hydrogen's Dielectric Permittivity
Topic: Chemical Engineering & Processing
Published: 8/10/2009
Authors: James W Schmidt, Michael R Moldover, Eric F. May
Abstract: We used a quasi-spherical cavity resonator to measure the relative dielectric permittivity {epsilon}^dr^ of H^d2^ at frequencies from 2.4 GHz to 7.3 GHz, at pressures up to 6.5 MPa, and at the temperatures 273 K and 293 K. The resonator was calibrat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901652

32. High Definition Flow
Topic: Chemical Engineering & Processing
Published: 8/1/2009
Authors: John D Wright, Michael R Moldover
Abstract: From pharmaceutical production to the natural gas market, exact flow measurements are critical. Here's how NIST helps keep us all on the same page.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832391

33. The Internal Fluid Mechanics of Explosive Trace Detectors using Computational Fluid Dynamics
Series: OTHER
Topic: Chemical Engineering & Processing
Published: 5/1/2009
Authors: Matthew E Staymates, Wayne Smith, John G Gillen
Abstract: Efforts are underway in the Surface and Microanalysis Science Division at the National Institute of Standards and Technology to study the vapor transport mechanisms inside explosive trace detection instruments (ETD s) and produce standard test materi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901483

34. The Electric And Magnetic Susceptibilities Of Gaseos Oxygen: Comparisons Of New Measurements and Modern Theory
Topic: Chemical Engineering & Processing
Published: 9/25/2008
Authors: Michael R Moldover, E May, James W Schmidt
Abstract: We used a cross capacitor to measure the relative dielectric permittivity {epsilon}^dr^ of O^d2^ at 273 K, 293 K, and 323 K and at pressures up to 6.5 MPa. Simultaneously we measured oxygen's complex refractive index {I}n{/I} using a quasi-spheri ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832266

35. Natural Gas Flow Calibration Service
Series: Special Publication (NIST SP)
Topic: Chemical Engineering & Processing
Published: 8/1/2008
Author: Aaron N Johnson
Abstract: This document describes NIST's high pressure natural gas flow calibration service (NGFCS). Flow calibrations are conducted offsite at the Colorado Experimental Engineering Station Incorporated (CEESI) in Garner, Iowa. A parallel array of nine tur ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832323

36. Isomerization and Decomposition Reactions in the Pyrolysis of Branched Hydrocarbons: 4-Methyl-1-Pentyl Radical
Topic: Chemical Engineering & Processing
Published: 7/31/2008
Authors: William S McGivern, Iftikhar Ahmad Awan, Wing Tsang, Jeffrey A Manion
Abstract: The kinetics of the decomposition of 4-methyl-1-pentyl radicals have been studied from 927 1068 K at pressures of 1.78 2.44 bar using a single pulse shock tube with product analysis. The reactant radicals were formed from the thermal C I bond fissio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832014

37. Shear Thinning Near the Critical Point of Xenon
Topic: Chemical Engineering & Processing
Published: 4/17/2008
Authors: Robert F Berg, Michael R Moldover, M Yao, G A Zimmerli
Abstract: We measured shear thinning, a viscosity decrease ordinarily associated with complex liquids, near the critical point of xenon. The data span the range of reduced shear rates: 0.001 < {gamma}{tau} < 700, where {gamma}{tau} is the shear rate scal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830987

38. Droplet Size Distributions in the Spray From Commercial Fogger Type Pepper Spray Products
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7334
Topic: Chemical Engineering & Processing
Published: 4/1/2008
Authors: Cary Presser, Edward V White, Alim A Fatah
Abstract: This report documents a preliminary investigation of the measurement of droplet sizes in the spray from four commercial fogger type pepper spray products. Droplet sizes were detected over the range of 2 mm to 120 mm by phase Doppler interferometry ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832150

39. Reference Viscosities of H^d2^, CH^d4^, Ar and Xe at Low Densities
Topic: Chemical Engineering & Processing
Published: 8/1/2007
Authors: E May, Robert F Berg, Michael R Moldover
Abstract: We determined the zero-density viscosity eta of hydrogen, methane and argon in the temperature range 200 K to 400 K, with standard uncertainties of 0.084 % for hydrogen and argon and 0.096 % for methane. These uncertainties are dominated by the unce ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830996

40. The Polarizability of Helium and Gas Metrology
Topic: Chemical Engineering & Processing
Published: 6/22/2007
Authors: James W Schmidt, R Gavioso, E May, Michael R Moldover
Abstract: Using a quasi-spherical, microwave cavity resonator, we measured the refractive index of helium to deduce its molar polarizability {I}A{/I}^d{epsilon}^ in the limit of zero density. We obtained ({I}A{/I}^d{epsilon},meas^ - {I}A{/I}^d{epsilon},theory^ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830993



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