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Propane: Causes of Price Volatility, Potential Consumer Options, and Opportunities to Improve Consumer Information and Federal Oversight

Description: A letter report issued by the General Accounting Office with an abstract that begins "More than 4.6 million residential households in the U.S., many with low incomes, rely on propane to heat their homes. Unfortunately, propane prices have been subject to major price spikes in two of the last three winters. Responding to congressional concern caused by these price spikes, GAO undertook a study to address the (1) factors that affect residential propane price volatility, (2) options available to p… more
Date: June 27, 2003
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CHARACTERIZATION OF PROPANE MONOOXYGENASE: INITIAL MECHANISTIC STUDIES

Description: Extensive industrial and DOE use of chlorinated hydrocarbons has resulted in widespread soil and ground-water contamination. Bioremediation is a potential remedy because various bacterial strains degrade chlorinated compounds, including trichloroethylene (TCE). Previous reports indicated that the propane monooxygenase (PMO) enzyme from Mycobacterium vaccae degraded TCE. These reports included additional substrates and resulting products that were inconsistent with PMO forming an epoxide interme… more
Date: April 2000
Creator: Unkefer, P.; Alvarez, M. & Unkefer, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The rate-limiting step for alkane dehydrogenation in zeolite H-ZSM-5.

Description: We have carried out a computational study of protolytic cracking, dehydrogenation, and H/D exchange of ethane, propane, and butane using a cluster model of H-ZSM-5. Our previous work has demonstrated that quantum-chemical techniques can give quantitatively accurate activation energies for alkane cracking in zeolites [1]. Experimental kinetic studies have shown that the apparent activation energies for cracking and H/D exchange decrease with n-alkane chain length, while for dehydrogenation the e… more
Date: November 1, 2000
Creator: Zygmunt, S. A.; Bootz, B. L.; Miller, A. W.; Curtiss, L. A. & Iton, L. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CO-FIRING COAL: FEEDLOT AND LITTER BIOMASS FUELS

Description: The following are proposed activities for quarter 1 (6/15/00-9/14/00): (1) Finalize the allocation of funds within TAMU to co-principal investigators and the final task lists; (2) Acquire 3 D computer code for coal combustion and modify for cofiring Coal:Feedlot biomass and Coal:Litter biomass fuels; (3) Develop a simple one dimensional model for fixed bed gasifier cofired with coal:biomass fuels; and (4) Prepare the boiler burner for reburn tests with feedlot biomass fuels. The following were … more
Date: October 24, 2000
Creator: Annamalai, Dr. Kalyan; Sweeten, Dr. John & Mukhtar, Dr. Sayeed
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermocatalytic CO{sub 2}-Free Production of Hydrogen from Hydrocarbon Fuels - Final Report for the Period August 1999 - September 2000

Description: The overall objective of this work is to develop a novel process for CO{sub 2}-free production of hydrogen via thermocatalytic decomposition (pyrolysis) of hydrocarbon fuels as a viable alternative to the conventional processes of methane steam reforming or partial oxidation. The objective of Phase I work was to demonstrate the technical feasibility of CO{sub 2}-free production of hydrogen and carbon from different hydrocarbons, including methane, propane and gasoline.
Date: October 1, 2000
Creator: Nazim Muradov, Ph.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermodynamic modeling of volatile hazardous metal behavior in the Vortec Vitrification System

Description: The thermochemical equilibrium calculations indicate that at the temperature of a propane--air flame, some volatilization of uranium, plutonium, technetium, and cesium will occur. The expected concentrations of plutonium, technetium, and cesium in the flame will be very low because of the small maximum concentration of these elements in the projected feed materials for the first 30-day test. The quantities volatilized can generally be decreased by operating the flame in a fuel-rich mode, althou… more
Date: July 31, 2000
Creator: Nowok, J. W. & Hurley, J. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Toward a reliable computational description of hydrocarbon activation in zeolites : a study of cracking, dehydrogenation, and H/D Exchange of alkanes in H-ZSM-5.

Description: During the past decade, quantum-chemical calculations have been used to model hydrocarbon reactions in zeolite acid catalysts. In the interest of computational feasibility, the zeolite has often been represented by a very small cluster model, at times including only one tetrahedrally-coordinated atom (a 1T cluster). The results of such calculations have given important qualitative insights such as possible reaction pathways and transition state geometries, but the calculated activation energies… more
Date: November 1, 2000
Creator: Zygmunt, S. A.; Bootz, B. L.; Miller, A. W.; Curtiss, L. A. & Iton, L. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fluid-Rock Characterization and Interactions in NMR Well Logging

Description: This semi-annual report briefly summarizes the progress since the 1st Annual Report issued September, 2000 and the next annual report. More detailed results will be in the annual reports. The main emphasis on fluid properties was on measurements of the relaxation time and self-diffusion coefficient of ethane and propane. Ethane is similar to methane while propane is more similar to the higher alkanes. The ratio of T1 and T2 is demonstrated to be a function of both viscosity and the NMR frequenc… more
Date: July 13, 2001
Creator: Hirasaki, George J. & Mohanty, Kishore K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water Heating: Energy-efficient strategies for supplying hot water in the home (BTS Technology Fact Sheet)

Description: Fact sheet for homeowners and contractors on how to supply hot water in the home while saving energy.
Date: August 15, 2001
Creator: Center, NAHB Research; Institute, Southface Energy; Laboratory, U.S. Department of Energy's Oak Ridge & Laboratory, U.S. Department of Energy's National Renewable Energy
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Alternative Fuel News: Official Publication of the U.S. Department of Energy's Clean Cities Network and the Alternative Fuels Data Center; Vol. 5, No. 1

Description: A quarterly magazine with articles on recent changes to the Clean Cities Program; the SuperTruck student engineering challenge; alternative fuel use in delivery fleets; and a propane vehicle rally and conference in February 2001, in Kansas City, Mo.
Date: April 18, 2001
Creator: LaRocque, T.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Field Demonstration of a Membrane Process to Recover Heavy Hydrocarbons and to Remove Water From Natural Gas Annual Report: 1999

Description: The objective of this project is to design, construct and field demonstrate a 3-MMscfd membrane system to recover natural gas liquids (NGL) and remove water from raw natural gas. An extended field test to demonstrate system performance under real-world conditions is required to convince industry users of the efficiency and reliability of the process. The system will be designed and fabricated by Membrane Technology and Research, Inc. (MTR) and then installed and operated at British Petroleum (B… more
Date: April 4, 2000
Creator: Lokhandwala, K. A.; Hofmann, T.; Kaschemekat, J.; Bailey, C.; Jacobs, M.; Baker, R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Field Demonstration of a Membrane Process to Recover Heavy Hydrocarbons and to Remove Water From Natural Gas Annual Report: 2002

Description: The objective of this project is to design, construct and field demonstrate a membrane system to recover natural gas liquids (NGL) and remove water from raw natural gas. An extended field test to demonstrate system performance under real-world conditions would convince industry users of the efficiency and reliability of the process. The system has been designed and fabricated by Membrane Technology and Research, Inc. (MTR) and will be installed and operated at British Petroleum (BP)-Amoco's Pas… more
Date: February 14, 2003
Creator: Baker, R.; Hofmann, R. & Lokhandwala, K. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The real air quality benefits of gaseous-fueled vehicles.

Description: This paper provides a justification for prominent inclusion of currently available gaseous-fueled vehicles (i.e., vehicles powered by propane, sometimes called liquefied petroleum gas [LPG], or natural gas--chiefly, methane--stored onboard the vehicle in gaseous or liquid state but combusted as a gas) in the mix of strategies to (a) reduce public exposure to toxic and fine particulate emissions in the urbanized areas of the developing world and (b) achieve local and regional improvements in ozo… more
Date: March 28, 2002
Creator: Saricks, C. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

COMBINED THEORETICAL AND EXPERIMENTAL INVESTIGATION OF MECHANISMS AND KINETICS OF VAPOR-PHASE MERCURY UPTAKE BY CARBONACOUES SURFACES

Description: The first part of this study evaluated the application of a versatile optical technique to study the adsorption and desorption of model adsorbates representative of volatile polar (acetone) and non-polar (propane) organic compounds on a model carbonaceous surface under ultra high vacuum (UHV) conditions. The results showed the strong correlation between optical differential reflectance (ODR) and adsorbate coverage determined by temperature programmed desorption (TPD). ODR technique was proved t… more
Date: May 1, 2002
Creator: Vidic, Radisav D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of catalyst structure on oxidative dehydrogenation of ethane and propane on alumina-supported vanadia

Description: The catalytic properties of Al2O3-supported vanadia with a wide range of VOx surface density (1.4-34.2 V/nm2) and structure were examined for the oxidative dehydrogenation of ethane and propane. UV-visible and Raman spectra showed that vanadia is dispersed predominantly as isolated monovanadate species below {approx}2.3 V/nm2. As surface densities increase, two-dimensional polyvanadates appear (2.3-7.0 V/nm2) along with increasing amounts of V2O5 crystallites at surface densities above 7.0 V/nm… more
Date: September 11, 2001
Creator: Argyle, Morris D.; Chen, Kaidong; Bell, Alexis T. & Iglesia, Enrique
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Detailed structural characterization of the grafting of [Ta(=CHtBu)(CH2tBu)3] and [Cp*TaMe4] on silica partially dehydroxylated at 700 C and the activity of the grafted complexes toward alkane metathesis

Description: The reaction of [Ta({double_bond}CHtBu)(CH{sub 2}tBu){sub 3}] or [Cp*Ta(CH{sub 3}){sub 4}] with a silica partially dehydroxylated at 700 C gives the corresponding monosiloxy surface complexes [({triple_bond}SiO)Ta({double_bond}CHtBu)(CH{sub 2}tBu){sub 2}] and [({triple_bond}SiO)Ta(CH{sub 3}){sub 3}Cp*] by eliminating a {sigma}-bonded ligand as the corresponding alkane (H-CH{sub 2}tBu or H-CH{sub 3}). EXAFS data show that an adjacent siloxane bridge of the surface plays the role of an extra surf… more
Date: August 30, 2004
Creator: Le Roux, Erwan; Chabanas, Mathieu; Baudouin, Anne; de Mallmann, Aimery; Coperet, Christophe; Quadrelli, E. Allesandra et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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NOVEL COMPOSITE HYDROGEN-PERMEABLE MEMBRANES FOR NON-THERMAL PLASMA REACTORS FOR THE DECOMPOSITION OF HYDROGEN SULFIDE

Description: The goal of this experimental project is to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H{sub 2}S) in a non-thermal plasma and recover hydrogen (H{sub 2}) through a superpermeable multi-layer membrane. Superpermeability of hydrogen atoms (H) has been reported by some researchers using membranes made of Group V transition metals (niobium, tantalum, vanadium, and their alloys), although it has yet to be confirmed in this study. Experiments involving metha… more
Date: July 1, 2004
Creator: Argyle, Morris D.; Ackerman, John F.; Muknahallipatna, Suresh; Hamann, Jerry C.; Legowski, Stanislaw; Zhang, Ji-Jun et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Strategic Energy Planning (Area 1) Consultants Reports to Citizen Potawatomi Nation Federally Recognized Indian Tribe

Description: The assets that Citizen Potawatomi Nation holds were evaluated to help define the strengths and weaknesses to be used in pursuing economic prosperity. With this baseline assessment, a Planning Team will create a vision for the tribe to integrate into long-term energy and business strategies. Identification of energy efficiency devices, systems and technologies was made, and an estimation of cost benefits of the more promising ideas is submitted for possible inclusion into the final energy plan.… more
Date: December 1, 2004
Creator: Smith, Marvin; Bose, James; Beier, Richard & Chang, Young Bae
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CO{sub 2} SEQUESTRATION POTENTIAL OF TEXAS LOW-RANK COALS

Description: The objectives of this project are to evaluate the feasibility of carbon dioxide (CO{sub 2}) sequestration in Texas low-rank coals and to determine the potential for enhanced coalbed methane (CBM) recovery as an added benefit of sequestration. There were three main objectives for this reporting period, which related to obtaining accurate parameters for reservoir model description and modeling reservoir performance of CO{sub 2} sequestration and enhanced coalbed methane recovery. The first objec… more
Date: February 1, 2005
Creator: McVay, Duane A.; Ayers, Walter B., Jr. & Jensen, Jerry L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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