11 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Chlorine"  
Results: 1 - 11
open access

Chlorine Free Technology for Solar-Grade Silicon Manufacturing: Preprint

Description: Due to the development of the solar energy industry, a significant increase of polysilicon feedstock (PSF) production will be required in near future. The creation of special technology of solar grade polysilicon feedstock production is an important problem. Today, semiconductor-grade polysilicon is mainly manufactured using the trichlorosilane (SiHCl3) distillation and reduction. The feed-stock for trichlorosilane is metallurgical-grade silicon, the product of reduction of natural quartzite (s… more
Date: August 1, 2004
Creator: Strebkov, D. S.; Pinov, A. P.; Zadde, V. V.; Lebedev, E. N.; Belov, E. P.; Efimov, N. K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Optimizing Technology to Reduce Mercury and Acid Gas Emissions from Electric Power Plants

Description: County-average hydrogen values are calculated for the part 2, 1999 Information Collection Request (ICR) coal-quality data, published by the U.S. Environmental Protection Agency. These data are used together with estimated, county-average moisture values to calculate average net heating values for coal produced in U.S. counties. Finally, 10 draft maps of the contiguous U.S. showing the potential uncontrolled sulfur, chlorine and mercury emissions of coal by U.S. county-of-origin, as well as expe… more
Date: July 31, 2004
Creator: Quick, Jeffrey C.; Tabet, David E.; Wakefield, Sharon & Bon, Roger L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Isolation of Metals from Liquid Wastes: Reactive Scavenging in Turbulent Thermal Reactors

Description: Sorption of cesium and strontium on kaolinite powders was investigated as a means to minimize the emissions of these metals during certain high temperature processes currently being developed to isolate and dispose of radiological and mixed wastes. In this work, non-radioactive aqueous cesium acetate or strontium acetate was atomized down the center of a natural gas flame supported on a variable-swirl burner in a refractory-lined laboratory-scale combustion facility. Kaolinite powder was inject… more
Date: December 16, 2004
Creator: Linak, William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Method for Making a Uranium Chloride Salt Product

Description: The subject apparatus provides a means to produce UCl3, in large quantities without incurring corrosion of the containment vessel or associated apparatus. Gaseous Cl is injected into a lower layer of Cd where CdCl2 is formed. Due to is lower density, the CdCl2 rises through the Cd layer into a layer of molten LiCl-KCL salt where a rotatable basket containing uranium ingots is suspended. The CdCl2 reacts with the uranium to form UCl, and Cd. Due to density differences, the Cd sinks down to the l… more
Date: October 5, 2004
Creator: Miller, William F. & Tomczuk, Zygmunt
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

OXIDATION OF MERCURY ACROSS SCR CATALYSTS IN COAL-FIRED POWER PLANTS BURNING LOW RANK FUELS

Description: The objectives of this program were to measure the oxidation of mercury in flue gas across SCR catalyst in a coal-fired power plant burning low rank fuels using a slipstream reactor containing multiple commercial catalysts in parallel and to develop a greater understanding of mercury oxidation across SCR catalysts in the form of a simple model. The Electric Power Research Institute (EPRI) and Argillon GmbH provided co-funding for this program. REI used a multicatalyst slipstream reactor to dete… more
Date: December 31, 2004
Creator: Senior, Constance
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

OXIDATION OF MERCURY ACROSS SCR CATALYSTS IN COAL-FIRED POWER PLANTS BURING LOW RANK FUELS

Description: This is the sixth Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-03NT41728. The objective of this program is to measure the oxidation of mercury in flue gas across SCR catalyst in a coal-fired power plant burning low rank fuels using a slipstream reactor containing multiple commercial catalysts in parallel. The Electric Power Research Institute (EPRI) and Argillon GmbH are providing co-funding for this program. This program contains multiple tasks and good progress is bein… more
Date: July 30, 2004
Creator: Senior, Constance
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Oxidation of elemental mercury by chlorine: Gas phase, Surface,and Photo-induced reaction pathways

Description: Accurate oxidation rate constants of mercury gas are needed for determining its dispersion and lifetime in the atmosphere. They would also help in developing a technology for the control of mercury emissions from coal-fired power plants. However, it is difficult to establish the accurate rate constants primarily due to the fact that mercury easily adsorbs on solid surface and its reactions can be catalyzed by the surface. We have demonstrated a procedure that allows the determination of gas pha… more
Date: October 22, 2004
Creator: Yan, Nai-Qiang; Liu, Shou-Heng & Chang, Shih-Ger
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Very Fine Aerosols from the World Trade Center Collapse Piles: Anaerobic Incineration

Description: By September 14, three days after the initial World Trade Center collapse, efforts at fire suppression and heavy rainfall had extinguished the immediate surface fires. From then until roughly mid-December, the collapse piles continuously emitted an acrid smoke and fume in the smoldering phase of the event. Knowledge of the sources, nature, and concentration of these aerosols is important for evaluation and alleviation of the health effects on workers and nearby residents. In this paper, we buil… more
Date: February 27, 2004
Creator: Cahill, Thomas A.; Cliff, Steven S.; Shackelford, James; Meier, Michael; Dunlap, Michael; Perry, Kevin D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

HWVP Iodine Trap Evaluation

Description: This report details our assessment of the chemistry of the planned Hanford Waste Vitrification Plant (HWVP) off-gas system and its impact on the applicability of known iodine removal and control methods. To predict the gaseous species in the off-gas system, we completed thermodynamic calculations to determine theoretical equilibrium concentrations of the various potential chemical species. In addition, we found that HWVP pilot-plant experiments were generally consistent with the known chemistry… more
Date: September 24, 2004
Creator: Burger, Leland L. & Scheele, Randall D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optimizing Techology to Reduce Mercury and Acid Gas Emissions from Electric Power Plants

Description: More than 56,000 coal quality data records from five public data sets have been selected for use in this project. These data will be used to create maps showing where coals with low mercury and acid-gas emissions might be found for power plants classified by air-pollution controls. Average coal quality values, calculated for 51,156 commercial coals by U.S. county-of-origin, are listed in the appendix. Coal moisture values are calculated for commercially shipped coal from 163 U.S. counties, wher… more
Date: January 31, 2004
Creator: Quick, Jeffrey C.; Tabet, David E.; Wakefield, Sharon & Bon, Roger L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental Evaluation of a Negative Ion Source for a Heavy Ion Fusion Negative Ion Driver

Description: Negative halogen ions have recently been proposed as a possible alternative to positive ions for heavy ion fusion drivers because electron accumulation would not be a problem in the accelerator, and if desired, the beams could be photo-detached to neutrals. To test the ability to make suitable quality beams, an experiment was conducted at Lawrence Berkeley National Laboratory using chlorine in an RF-driven ion source. Without introducing any cesium (which is required to enhance negative ion pro… more
Date: June 16, 2004
Creator: L.R. Grisham, S.K. Hahto, S.T. Hahto, J.W. Kwan, and K.N. Leung
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen