449 Matching Results

Search Results

Advanced search parameters have been applied.

Preventing Worker Injuries and Deaths from Explosions in Industrial Ethylene Oxide Sterilization Facilities: Revised Edition

Description: This report provides information on the explosions and resulting injuries or deaths that may occur from working with ethylene oxide and recommends steps for preventing these explosions.
Date: 2007
Creator: United States. National Institute for Occupational Safety and Health
Partner: UNT Libraries Government Documents Department

An Equation of State for Fluid Ethylene

Description: Abstract: A thermodynamic property formulation for ethylene, developed as a part of a joint industry-government project, is presented. The formulation includes an equation of state, vapor pressure equation, and equation for the ideal gas heat capacity. The coefficients were determined by a least squares fit of selected experimental data. Comparisons of property values calculated using the equation of state with measured values are given. The equation of state is not valid in the critical region (pc + 0.3 pc for temperatures of Tc + 0.05 Tc). Errors on the order of 20 percent for derived properties and 10 percent for density may be encountered near the critical point. Tables of the thermodynamic properties of ethylene for the liquid and vapor phases for temperatures from the freezing line to 450 K with pressures to 40 MPa are presented. The equation of state and its derivative and integral functions for calculating thermodynamic properties are included. Estimates of the accuracy of calculated properties are given. A guide for use of computer programs for the calculation of thermodynamic properties of ethylene with listings of subprograms and a sample program to illustrate the use and results of the program are included.
Date: July 1981
Creator: McCarty, Robert D. & Jacobsen, Richard T.
Partner: UNT Libraries Government Documents Department

The effects of an increase in the concentration of ethylene dibromide in a leaded fuel on lead deposition, corrosion of exhaust valves, and knock-limited power

Description: Report presenting an investigation of the use of ethylene dibromide to leaded fuel in order to prevent lead deposits within the cylinder. It is meant to react with lead to form volatile compounds that will be scavenged with exhaust gases. Results regarding the lead deposits, knock-limited effective pressures, performance, and temperatures are provided.
Date: June 1945
Creator: Mulcahy, B. A. & Zipkin, M. A.
Partner: UNT Libraries Government Documents Department

Heat of Combustion of the Product Formed by the Reaction of Acetylene, Ethylene, and Diborane

Description: "The net heat of combustion of the product formed by the reaction of diborane with a mixture of acetylene and ethylene was found to be 20,440 +/- 150 Btu per pound for the reaction of liquid fuel to gaseous carbon dioxide, gaseous water, and solid boric oxide. The measurements were made in a Parr oxygen-bomb calorimeter, and the combustion was believed to be 98 percent complete. The estimated net-heat of combustion for complete combustion would therefore be 20,850 +/- 150 Btu per pound" (p. 1).
Date: October 24, 1957
Creator: Tannenbaum, Stanley
Partner: UNT Libraries Government Documents Department

Enthalpies of solution and enthalpies of solvation of organic solutes in ethylene glycol at 298.15 K: prediction and analysis of intermolecular interaction contributions

Description: This article studies thermochemistry of solvation of inert gases and organic solutes in ethylene glycol was thoroughly studied using solution calorimetry technique.
Date: December 24, 2016
Creator: Stolov, Mikhail; Zaitseva, Ksenia V.; Varfolomeev, Mikhail A. & Acree, William E. (William Eugene)
Partner: UNT College of Arts and Sciences

Use of [SbF₆]⁻ to Isolate Cationic Copper and Silver Adducts with More than One Ethylene on the Metal Center

Description: Article discussing the use of [SbF₆]⁻ to isolate cationic copper and silver adducts with more than one ethylene on the metal center.
Date: May 15, 2013
Creator: Fianchini, Mauro; Campana, Charles; Chilukuri, Bhaskar; Cundari, Thomas R., 1964-; Petricek, Vaclav & Dias, H. V. Rasika
Partner: UNT College of Arts and Sciences

The transfer of neutral molecules, ions and ionic species from water to ethylene glycol and to propylene carbonate; descriptors for pyridinium cations

Description: Article on the transfer of neutral molecules, ions and ionic species from water to ethylene glycol and to propylene carbonate and descriptors for pyridinium cations.
Date: June 29, 2010
Creator: Abraham, M. H. (Michael H.) & Acree, William E. (William Eugene)
Partner: UNT College of Arts and Sciences

Numerical study of ethylene and acetylene laminar flame speeds

Description: Detailed chemical kinetic computations for ethylene-air and acetylene-air mixtures have been performed to simulate laminar flame speeds. Sensitivity analysis was applied to determine those reactions which strongly influence flame propagation. In ethylene-air mixtures, the C{sub 2}H{sub 3} + O{sub 2} = CH{sub 2}CHO + O reaction was one of the most sensitive reactions in the C{sub 2}H{sub 4}/C{sub 2}H{sub 3} submechanism and therefore this reaction was very important to ethylene flame propagation. This reaction was not considered in previously reported mechanisms used to model ethylene-air flame propagation. In acetylene-air mixtures, the C{sub 2}H{sub 2}+O {yields} Products, HCCO+H=CH{sub 2}(s)+CO, HCCO+O{sub 2}=CO{sub 2}+CO+H, H+C{sub 2}H{sub 2}(+M) = C{sub 2}H{sub 3}(+M) and CH{sub 2}(s)+C{sub 2}H{sub 2} = H{sub 2}CCCH+H were the most sensitive reactions in the C{sub 2}H{sub 2}/HCCO / CH{sub 2}(s) reaction set.
Date: March 1, 1995
Creator: Marinov, N.M.; Pitz, W.J. & Westbrook, C.K.
Partner: UNT Libraries Government Documents Department

The Effect of Ethylene Dibromide on the Knock-Limited Performance of Leaded and Nonleaded S Reference Fuel

Description: Report discussing testing to determine the effect of ethylene dibromide on the knock-limited performance of S reference fuel. An increase in ethylene-dibromide content did appear to decrease the knock-limited performance of the fuel up to a certain point and at all but the extremes of fuel-air mixtures.
Date: February 1946
Creator: Kinney, George R. & Niemi, Richard O.
Partner: UNT Libraries Government Documents Department

Femtosecond isomerization dynamics in the ethylene cation measured in an EUV-pump NIR-probe configuration

Description: Dynamics in the excited ethylene cation C{sub 2}H{sub 4}{sup +} lead to isomerization to the ethylidene configuration (HC-CH{sub 3}){sup +}, which is predicted to be a transient configuration for electronic relaxation. With an intense femtosecond EUV (extreme ultraviolet) pump pulse to populate the excited state, and an NIR (near infrared) probe pulse to produce the fragments CH{sup +} and CH{sub 3}{sup +} (which provides a direct signature of ethylidene), we measure optimum fragment yields at a probe delay of 80 fs. Also, an H{sub 2}-stretch transient configuration, yielding H{sub 2}{sup +} upon probing, is found to succeed the ethylidene configuration. We find that a simple single- or double-decay model does not match the data, and we present a modified model (introduction of an isomerization delay of 50 {+-} 25 fs) that does provide agreement.
Date: March 17, 2009
Creator: van Tilborg, Jeroen; Allison, Tom; Wright, Travis; Hertlein, Marc; Falcone, Roger; Liu, Yanwei et al.
Partner: UNT Libraries Government Documents Department


Description: A review of various ways in which nuclear energy can be used in the chemical process industry is presented. Data are included on aspects of radioinduced polymerization of ethylene. Flowsheets are included for radiochemonuclear, thermochemonuclear, electrochemonuclear, and photochemonuclear reactors. Other information is included on irradiation loops. (J.R.D.)
Date: February 1, 1963
Creator: Steinberg, M. & Manowitz, B.
Partner: UNT Libraries Government Documents Department

Membrane/distillation hybrid process research and development. Final report, phase II

Description: This report covers work conducted under the grant awarded to BP by DOE in late 1991 entitled {open_quotes}Membrane/Distillation Hybrid Process Research and Development.{close_quotes} The program was directed towards development and commercialization of the BP process for separation of vapor phase olefins from non-olefins via facilitated transport using an aqueous facilitator. The program has come to a very successful conclusion, with formation of a partnership between BP and Stone and Webster Engineering Corporation (SWEC) to market and commercialize the technology. The focus of this report is the final portion of the program, during which engineering re-design, facilitator optimization, economic analysis, and marketing have been the primary activities. At the end of Phase II BP was looking to partner with an engineering firm to advance the selective olefin recovery (SOR) technology from the lab/demo stage to full commercialization. In August 1995 BP and SWEC reached an agreement to advance the technology by completing additional Phase III work with DOE and beginning marketing activities.
Date: July 1, 1997
Creator: Mazanec, T.J.
Partner: UNT Libraries Government Documents Department

Advanced Distillation Final Report

Description: The Advanced Distillation project was concluded on December 31, 2009. This U.S. Department of Energy (DOE) funded project was completed successfully and within budget during a timeline approved by DOE project managers, which included a one year extension to the initial ending date. The subject technology, Microchannel Process Technology (MPT) distillation, was expected to provide both capital and operating cost savings compared to conventional distillation technology. With efforts from Velocys and its project partners, MPT distillation was successfully demonstrated at a laboratory scale and its energy savings potential was calculated. While many objectives established at the beginning of the project were met, the project was only partially successful. At the conclusion, it appears that MPT distillation is not a good fit for the targeted separation of ethane and ethylene in large-scale ethylene production facilities, as greater advantages were seen for smaller scale distillations. Early in the project, work involved flowsheet analyses to discern the economic viability of ethane-ethylene MPT distillation and develop strategies for maximizing its impact on the economics of the process. This study confirmed that through modification to standard operating processes, MPT can enable net energy savings in excess of 20%. This advantage was used by ABB Lumus to determine the potential impact of MPT distillation on the ethane-ethylene market. The study indicated that a substantial market exists if the energy saving could be realized and if installed capital cost of MPT distillation was on par or less than conventional technology. Unfortunately, it was determined that the large number of MPT distillation units needed to perform ethane-ethylene separation for world-scale ethylene facilities, makes the targeted separation a poor fit for the technology in this application at the current state of manufacturing costs. Over the course of the project, distillation experiments were performed with the targeted mixture, ethane-ethylene, as ...
Date: March 24, 2010
Creator: Fanelli, Maddalena; Arora, Ravi; Tonkovich, Annalee; Marco, Jennifer & Rode, Ed
Partner: UNT Libraries Government Documents Department