Novel carbons from Illinois coal for natural gas storage. Technical report, March 1--May 31, 1995

Novel carbons from Illinois coal for natural gas storage. Technical report, March 1--May 31, 1995

Date: December 31, 1995
Creator: Rostam-Abadi, M.; Sun, Jian & Lizzio, A.A.
Description: Goal is to develop a technology for producing microengineered adsorbent carbons from Illinois coal and to evaluate their potential application for storing natural gas for use in emerging low pressure, natural gas vehicles (NGVs). Focus is to design and engineer adsorbents that meet or exceed performance and cost targets established for low-pressure natural gas storage materials. Potentially, about two million tons adsorbent could be consumed in NGVs by year 2000. If successful, the results could lead to use of Illinois coal in a market that could exceed 6 million tons per year. Activated carbon samples were prepared from IBC-106 coal by controlling both the preoxidation temperature and time, and the devolatilization temperature in order to eliminate coal caking. A 4.6 cc pressurized vessel was constructed to measure the Vm/Vs methane adsorption capacity (volume of stored methane at STP per volume storage container). Several IBC-106 derived activated carbons showed methane adsorption capacities comparable to that of a 1000 m{sup 2}/g commercial activated carbon. Results indicated that surface area and micropore volume of activated carbons are important for natural gas storage. Work is in progress to synthesize samples from IBC-106 coal with optimum pore diameter for methane adsorption.
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Physical and chemical characteristics of topographically affected airflow in an open borehole at Yucca Mountain, Nevada

Physical and chemical characteristics of topographically affected airflow in an open borehole at Yucca Mountain, Nevada

Date: December 31, 1989
Creator: Thorstenson, D.C.; Woodward, J.C.; Weeks, E.P. & Haas, H.
Description: Borehole UZ6S, on the crest of Yucca Mountain, Nevada Test Site, has exhaled approximately 10{sup 6} m{sup 3} of gas annually during winter months for three successive years. The flow arises from thermal-topographic effects. The average composition of the exhausted gas is: N{sub 2} = 78%, O{sub 2} = 21%, Ar = 0.94%, CO{sub 2} = 0.125%, and CH{sub 4} = 0.2 ppMv. The CO{sub 2} has the following isotopic signature: {sup 14}C = 108.5 percent modern carbon (pmc), and {delta}{sup 13}C = 17.1 per mil. In the thirty-month observation period, there has been a net flux to the atmosphere of approximately 40 m{sup 3} of liquid water and 1150 kg of carbon. The gas flowing from UZ6S appears to originate in the soil and/or shallow unsaturated zone at Yucca Mountain crest. 25 refs., 6 figs., 4 tabs.
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Aerogel derived catalysts

Aerogel derived catalysts

Date: December 11, 1996
Creator: Reynolds, J. G., LLNL
Description: Aerogels area class of colloidal materials which have high surface areas and abundant mesoporous structure. SiO{sub 2} aerogels show unique physical, optical and structural properties. When catalytic metals are incorporated in the aerogel framework, the potential exists for new and very effective catalysts for industrial processes. Three applications of these metal-containing SiO{sub 2} aerogels as catalysts are briefly reviewed in this paper--NO{sub x} reduction, volatile organic compound destruction, and partial oxidation of methane.
Contributing Partner: UNT Libraries Government Documents Department
Albany Interim Landfill gas extraction and mobile power system: Using landfill gas to produce electricity. Final report

Albany Interim Landfill gas extraction and mobile power system: Using landfill gas to produce electricity. Final report

Date: June 1, 1997
Creator: unknown
Description: The Albany Interim Landfill Gas Extraction and Mobile Power System project served three research objectives: (1) determination of the general efficiency and radius of influence of horizontally placed landfill gas extraction conduits; (2) determination of cost and effectiveness of a hydrogen sulfide gas scrubber utilizing Enviro-Scrub{trademark} liquid reagent; and (3) construction and evaluation of a dual-fuel (landfill gas/diesel) 100 kW mobile power station. The horizontal gas extraction system was very successful; overall, gas recovery was high and the practical radius of influence of individual extractors was about 50 feet. The hydrogen sulfide scrubber was effective and its use appears feasible at typical hydrogen sulfide concentrations and gas flows. The dual-fuel mobile power station performed dependably and was able to deliver smooth power output under varying load and landfill gas fuel conditions.
Contributing Partner: UNT Libraries Government Documents Department
Methane Capture: Options for Greenhouse Gas Emission Reduction

Methane Capture: Options for Greenhouse Gas Emission Reduction

Date: September 17, 2009
Creator: Bracmort, Kelsi; Ramseur, Jonathan L.; McCarthy, James E.; Folger, Peter & Marples, Donald J.
Description: This report discusses legislative alternatives for addressing methane capture, sources of methane, opportunities and challenges for methane capture, and current federal programs that support methane recovery.
Contributing Partner: UNT Libraries Government Documents Department
Development of METHANE de-NOX reburning process. Quarterly report, October 1 - December 31, 1999

Development of METHANE de-NOX reburning process. Quarterly report, October 1 - December 31, 1999

Date: December 31, 1999
Creator: unknown
Description: The use of biomass and wood waste solids and sludges as fuel is often hampered by their low heating values and the presence of bound nitrogen that result in inefficient combustion and high NOx emission. Cofiring supplemental fuel through auxiliary burners helps with improving the combustion effectiveness and NOx reduction, but the benefits are limited to the fractional heat input of the auxiliary fuel. Demonstration tests have shown over 60% reduction in NOx, CO and VOC emissions, and a 2% increase in boiler thermal efficiency using only 8 to 13% natural gas.
Contributing Partner: UNT Libraries Government Documents Department
A Long Term Field Emissions Study of Natural Gas Fueled Refuse Haulers in New York City

A Long Term Field Emissions Study of Natural Gas Fueled Refuse Haulers in New York City

Date: October 19, 1998
Creator: Clark, Nigel N.; Rapp, Byron l.; Gautam, Mridul; Wang, Wenguang & Lyons, Donald W.
Description: New York City Department of Sanitation has operated natural gas fueled refuse haulers in a pilot study: a major goal of this study was to compare the emissions from these natural gas vehicles with their diesel counterparts. The vehicles were tandem axle trucks with GVW (gross vehicle weight) rating of 69,897 pounds. The primary use of these was for street collection and transporting the refuse to a landfill. West Virginia University Transportable Heavy Duty Emissions Testing Laboratories have been engaged in monitoring the tailpipe emissions from these trucks for seven-years. In the later years of testing the hydrocarbons were speciated for non-methane and methane components. Six of these vehicles employed the older technology (mechanical mixer) Cummins L-10 lean burn natural gas engines. Five trucks were equipped with electronically controlled Detroit Diesel Series 50 lean burn engines, while another five were powered by Caterpillar stoichiometric burn 3306 natural gas engines, The Ca terpillar engines employed an exhaust oxygen sensor feedback and three way catalysts. Since the refuse haulers had automatic Allison transmissions, and since they were employed in stop-and-go city service, initial emissions measurements were made using the Central Business Cycle (SAE Jl376) for buses at 42,000 pound test weight. Some ...
Contributing Partner: UNT Libraries Government Documents Department
2000 Annual Interim Sanitary Landfill Groundwater Monitoring Report

2000 Annual Interim Sanitary Landfill Groundwater Monitoring Report

Date: January 26, 2001
Creator: Chase, J.A.
Description: This report includes a discussion of the groundwater flow direction and rate, the groundwater analytical results, and the methane monitoring results.
Contributing Partner: UNT Libraries Government Documents Department
Quarterly report July 1 - September 30, 1999 [Development of METHANE de-NOX{reg_sign} reburning process]

Quarterly report July 1 - September 30, 1999 [Development of METHANE de-NOX{reg_sign} reburning process]

Date: September 30, 1999
Creator: unknown
Description: The use of biomass and wood waste solids and sludges as fuel is often hampered by their low heating values and the presence of bound nitrogen that result in inefficient combustion and high NOx emissions. Cofiring supplemental fuel through auxiliary burners helps with improving the combustion effectiveness and NOx reduction, but the benefits are limited to the fractional heat input of the auxiliary fuel. IGT has developed a recess called METHANE de-NOX{reg_sign} , which has shown substantially greater economic, energy and environmental benefits than traditional cofiring methods in demonstrations with both MSW- and coal-fired stoker boilers. In this process, auxiliary fuel such as natural gas or oil is injected directly into the lower region of the primary flame zone just above the grate. This increases and stabilizes the average combustion temperature, which improves combustion of high-moisture fuels, provides more uniform temperature profiles and reduced peak temperature, and reduces the availability of oxygen to reduce NOx formation. This is in contrast to conventional reburning, where natural gas is injected above the primary combustion zone after the majority of NOx has already been formed.
Contributing Partner: UNT Libraries Government Documents Department
Methane coupling by membrane reactor. Quarterly technical progress report, June 25--September 24, 1997

Methane coupling by membrane reactor. Quarterly technical progress report, June 25--September 24, 1997

Date: November 2, 1997
Creator: Ma, Y.H.
Description: A new reactor module was constructed as a porous membrane reactor or radial flow reactor for the study of methane oxidative coupling. A Mn-W-Na/SiO{sub 2} catalyst was prepared by the slurry mixing method and its catalytic activity was evaluated in a porous alumina membrane reactor. Experimental results showed that the Mn-W-Na/SiO{sub 2} catalyst calcined at 900 C was not stable during methane oxidative coupling. After 1,050 C calcination the catalyst became stable, however its activity was not as good as the one prepared by incipient wetness impregnation. The dense membrane tube obtained from Eltron Research Inc. was tested in a membrane reactor for the catalytic oxidative coupling of methane. The Mn-W-Na/SiO{sub 2} catalyst prepared by the incipient wetness impregnation method was packed inside the membrane tube. The initial oxygen flux was 0.02 cc/cm{sup 2}-min. It increased to 0.34 cc/cm{sup 2}-min after reaction and remained unchanged during a period of 31 days on stream. In a temperature range of 688 C to 977 C, the increase in oxygen flux with temperature obeyed the Arrhenius law. The C{sub 2} yield was about 10% at a methane conversion of 20%. The yield of the membrane reactor with Eltron membrane tube was higher than ...
Contributing Partner: UNT Libraries Government Documents Department
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