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Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers
Reaction Engineering International (REI) managed a team of experts from University of Utah, Siemens Energy, Praxair, Vattenfall AB, Sandia National Laboratories, Brigham Young University (BYU) and Corrosion Management Ltd. to perform multi-scale experiments, coupled with mechanism development, process modeling and CFD modeling, for both applied and fundamental investigations. The primary objective of this program was to acquire data and develop tools to characterize and predict impacts of CO{sub 2} flue gas recycle and burner feed design on flame characteristics (burnout, NO{sub x}, SO{sub x}, mercury and fine particle emissions, heat transfer) and operational concerns (fouling, slagging and corrosion) inherent in the retrofit of existing coal-fired boilers for oxy-coal combustion. Experimental work was conducted at Sandia National Laboratories’ Entrained Flow Reactor, the University of Utah Industrial Combustion Research Facility, and Brigham Young University. Process modeling and computational fluid dynamics (CFD) modeling was performed at REI. Successful completion of the project objectives resulted in the following key deliverables: 1) Multi-scale test data from 0.1 kW bench-scale, 100 kW and 200 kW laboratory-scale, and 1 MW semi-industrial scale combustors that describe differences in flame characteristics, fouling, slagging and corrosion for coal combustion under air-firing and oxygen-firing conditions, including sensitivity to oxy-burner design and …
Date:
September 30, 2013
Creator:
Adams, Bradley; Davis, Kevin; Senior, Constance; Shim, Hong Shim; Otten, Brydger; Fry, Andrew et al.
Object Type:
Report
System:
The UNT Digital Library
A Beam Driven Plasma-Wakefield Linear Collider: From Higgs Factory to Multi-TeV
None
Date:
September 30, 2013
Creator:
Adli, E.; Delahaye, J. P.; Gessner, S. J.; Hogan, M. J.; Raubenheimer, T.; An, W. et al.
Object Type:
Article
System:
The UNT Digital Library
Bringing Electronic Theses and Dissertations (ETDs) to the Point of Use: Metadata vs. Full-Text Controversy
This presentation discusses the increase of URLS within electronic theses and dissertations at UNT, and a comparison of queries through metadata and full-text discovery.
Date:
September 30, 2016
Creator:
Alemneh, Daniel Gelaw
Object Type:
Presentation
System:
The UNT Digital Library
Open Access Publishing and the Evolving Landscape of Scholarly Communication
Presentation that covers the basic principles of open access including stakeholder roles, policies, challenges and opportunities, emerging trends, and institutional initiatives.
Date:
September 30, 2019
Creator:
Alemneh, Daniel Gelaw
Object Type:
Presentation
System:
The UNT Digital Library
Understanding User Discovery of ETD: Metadata or Full-Text, How Did They Get There?
Presentation for the 2015 US Electronic Thesis and Dissertation Association (USETDA) Annual Conference. This presentation discusses understanding user discovery of electronic theses and dissertations (ETDs) and whether users make use of metadata records when searching or full text searching.
Date:
September 30, 2015
Creator:
Alemneh, Daniel Gelaw
Object Type:
Presentation
System:
The UNT Digital Library
Advanced CO{sub 2} Capture Technology for Low Rank Coal IGCC System
The overall objective of the project is to demonstrate the technical and economic viability of a new Integrated Gasification Combined Cycle (IGCC) power plant designed to efficiently process low rank coals. The plant uses an integrated CO{sub 2} scrubber/Water Gas Shift (WGS) catalyst to capture over90 percent capture of the CO{sub 2} emissions, while providing a significantly lower cost of electricity (COE) than a similar plant with conventional cold gas cleanup system based on SelexolTM technology and 90 percent carbon capture. TDA’s system uses a high temperature physical adsorbent capable of removing CO{sub 2} above the dew point of the synthesis gas and a commercial WGS catalyst that can effectively convert CO in The overall objective of the project is to demonstrate the technical and economic viability of a new Integrated Gasification Combined Cycle (IGCC) power plant designed to efficiently process low rank coals. The plant uses an integrated CO{sub 2} scrubber/Water Gas Shift (WGS) catalyst to capture over90 percent capture of the CO{sub 2} emissions, while providing a significantly lower cost of electricity (COE) than a similar plant with conventional cold gas cleanup system based on SelexolTM technology and 90 percent carbon capture. TDA’s system uses a high temperature …
Date:
September 30, 2013
Creator:
Alptekin, Gokhan
Object Type:
Report
System:
The UNT Digital Library
Impact of Contaminants Present in Coal-Biomass Derived Synthesis Gas on Water-gas Shift and Fischer-Tropsch Synthesis Catalysts
Co-gasification of biomass and coal in large-scale, Integrated Gasification Combined Cycle (IGCC) plants increases the efficiency and reduces the environmental impact of making synthesis gas ("syngas") that can be used in Coal-Biomass-to-Liquids (CBTL) processes for producing transportation fuels. However, the water-gas shift (WGS) and Fischer-Tropsch synthesis (FTS) catalysts used in these processes may be poisoned by multiple contaminants found in coal-biomass derived syngas; sulfur species, trace toxic metals, halides, nitrogen species, the vapors of alkali metals and their salts (e.g., KCl and NaCl), ammonia, and phosphorous. Thus, it is essential to develop a fundamental understanding of poisoning/inhibition mechanisms before investing in the development of any costly mitigation technologies. We therefore investigated the impact of potential contaminants (H{sub 2}S, NH{sub 3}, HCN, AsH{sub 3}, PH{sub 3}, HCl, NaCl, KCl, AS{sub 3}, NH{sub 4}NO{sub 3}, NH{sub 4}OH, KNO{sub 3}, HBr, HF, and HNO{sub 3}) on the performance and lifetime of commercially available and generic (prepared in-house) WGS and FT catalysts; ferrochrome-based high-temperature WGS catalyst (HT-WGS, Shiftmax 120â¢, Süd-Chemie), low-temperature Cu/ZnO-based WGS catalyst (LT-WGS, Shiftmax 230â¢, Süd-Chemie), and iron- and cobalt-based Fischer-Trospch synthesis catalysts (Fe-FT & Co-FT, UK-CAER). In this project, TDA Research, Inc. collaborated with a team at the University of Kentucky …
Date:
September 30, 2012
Creator:
Alptekin, Gokhan
Object Type:
Report
System:
The UNT Digital Library
A Low Cost, High Capacity Regenerable Sorbent for Pre-combustion CO{sub 2} Capture
The overall objective of the proposed research is to develop a low cost, high capacity CO{sub 2} sorbent and demonstrate its technical and economic viability for pre-combustion CO{sub 2} capture. The specific objectives supporting our research plan were to optimize the chemical structure and physical properties of the sorbent, scale-up its production using high throughput manufacturing equipment and bulk raw materials and then evaluate its performance, first in bench-scale experiments and then in slipstream tests using actual coal-derived synthesis gas. One of the objectives of the laboratory-scale evaluations was to demonstrate the life and durability of the sorbent for over 10,000 cycles and to assess the impact of contaminants (such as sulfur) on its performance. In the field tests, our objective was to demonstrate the operation of the sorbent using actual coal-derived synthesis gas streams generated by air-blown and oxygen-blown commercial and pilot-scale coal gasifiers (the CO{sub 2} partial pressure in these gas streams is significantly different, which directly impacts the operating conditions hence the performance of the sorbent). To support the field demonstration work, TDA collaborated with Phillips 66 and Southern Company to carry out two separate field tests using actual coal-derived synthesis gas at the Wabash River IGCC …
Date:
September 30, 2012
Creator:
Alptekin, Gokhan
Object Type:
Report
System:
The UNT Digital Library
Deep Minima and Vortices for Positronium Formation in Low-Energy Positron-Hydrogen Collisions
Article using the two-channel Kohn inverse and Kohn variational methods to investigate ground-state positronium (Ps) formation in positron-hydrogen collisions in the Ore gap. This is the Accepted Manuscript Version of the article.
Date:
September 30, 2019
Creator:
Alrowaily, Albandari W.; Quintanilla, Sandra J. & Van Reeth, P.
Object Type:
Article
System:
The UNT Digital Library
Envisioning an Ecologically Sustainable Campus At New England College
Appropriation funding for our project Ecologically Sustainable Campus - New England College (NH). 67.09. supported five environmental initiatives: (1) a wood pellet boiler for our Science Building, (2) solar hot water panels and systems for five campus buildings, (3) campus-wide energy lighting efficiency project, (4) new efficiency boiler system in Colby Residence Hall, and (5) energy efficient lighting system for the new artificial athletic turf field. (1) New England College purchased and installed a new wood pellet boiler in the Science Building. This new boiler serves as the primary heating source for this building. Our boiler was purchased through New England Wood Pellet, LLC, located in Jaffrey, New Hampshire. The boiler selected was a Swebo, P500. 300KW wood pellet boiler. The primary goals, objectives, and outcomes of this initiative include the installation of a wood pellet boiler system that is environmentally friendly, highly efficient, and represents a sustainable and renewable resource for New England College. This project was completed on December 15, 2010. (2) New England College purchased and installed solar hot water panels and systems for the Science Building, the Simon Center (student center), the H. Raymond Danforth Library, Gilmore Dining Hall, and Bridges Gymnasium. The College worked with …
Date:
September 30, 2010
Creator:
Amato, Paula & Palmer, Gregory
Object Type:
Report
System:
The UNT Digital Library
What's Brewing at UNT: Final Report
This report documents the What's Brewing at UNT project funded through the 2016 Dean's Innovation Grant. The final report briefly describes the What's Brewing at UNT project activities, budget, outcomes, best practices, and sustainability.
Date:
September 30, 2017
Creator:
Andrews, Pamela; Hardin, Gregory & Smith, Susan
Object Type:
Report
System:
The UNT Digital Library
Daily Tribune (Mount Pleasant, Tex.), Vol. 140, No. 193, Ed. 1 Tuesday, September 30, 2014
Daily newspaper from Mount Pleasant, Texas that includes local, state, and national news along with advertising.
Date:
September 30, 2014
Creator:
Antonelli, Lou & Borders, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
Wetland Water Cooling Partnership: The Use of Constructed Wetlands to Enhance Thermoelectric Power Plant Cooling and Mitigate the Demand of Surface Water Use
Through the Phase I study segment of contract #DE-NT0006644 with the U.S. Department of Energy’s National Energy Technology Laboratory, Applied Ecological Services, Inc. and Sterling Energy Services, LLC (the AES/SES Team) explored the use of constructed wetlands to help address stresses on surface water and groundwater resources from thermoelectric power plant cooling and makeup water requirements. The project objectives were crafted to explore and develop implementable water conservation and cooling strategies using constructed wetlands (not existing, naturally occurring wetlands), with the goal of determining if this strategy has the potential to reduce surface water and groundwater withdrawals of thermoelectric power plants throughout the country. Our team’s exploratory work has documented what appears to be a significant and practical potential for augmenting power plant cooling water resources for makeup supply at many, but not all, thermoelectric power plant sites. The intent is to help alleviate stress on existing surface water and groundwater resources through harvesting, storing, polishing and beneficially re-using critical water resources. Through literature review, development of conceptual created wetland plans, and STELLA-based modeling, the AES/SES team has developed heat and water balances for conventional thermoelectric power plants to evaluate wetland size requirements, water use, and comparative cooling technology costs. …
Date:
September 30, 2013
Creator:
Apfelbaum, Steven; Duvall, Kenneth; Nelson, Theresa; Mensing, Douglas; Bengtson, Harlan; Eppich, John et al.
Object Type:
Report
System:
The UNT Digital Library
Integrated Advanced Energy Systems Research at IIT
This report consists of Two research projects; Sustainable Buildings and Hydrogen Storage. Sustainable Building Part includes: Wind and the self powered built environment by professor P. Land and his research group and experimental and computational works by professor D. Rempfer and his research group. Hydrogen Storage part includes: Hydrogen Storage Using Mg-Mixed Metal Hydrides by professor H. Arastoopour and his research team and Carbon Nanostructure as Hydrogen Storage Material by professor J. Prakash and his research team.
Date:
September 30, 2010
Creator:
Arastoopour, Hamid
Object Type:
Report
System:
The UNT Digital Library
American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Administrative and Laboratory Building, Springfield, Virginia
This report documents the findings of an on-site energy audit of the U.S. Customs and Border Protection Laboratory in Springfield, Virginia.
Date:
September 30, 2010
Creator:
Arends, J. & Sandusky, William F.
Object Type:
Report
System:
The UNT Digital Library
American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Data Center, Springfield, Virginia
This report documents the findings of an on-site energy audit of the U.S. Customs and Border Protection (CBP) Data Center in Springfield, Virginia.
Date:
September 30, 2010
Creator:
Arends, J. & Sandusky, William F.
Object Type:
Report
System:
The UNT Digital Library
American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Laboratory, Houston, Texas
This report documents the findings of an on-site energy audit of the U.S. Customs and Border Protection (CBP) Laboratory in Houston, Texas. The focus of the audit was to identify various no-cost and low-cost energy efficiency opportunities that, once implemented, would reduce electricity and gas consumption and increase the operational efficiency of the building. This audit also provided an opportunity to identify potential capital cost projects that should be considered in the future to acquire additional energy (electric and gas) and water savings to further increase the operational efficiency of the building.
Date:
September 30, 2010
Creator:
Arends, J. & Sandusky, William F.
Object Type:
Report
System:
The UNT Digital Library
American Recovery and Reinvestment Act, Federal Energy Management Program, Technical Assistance Project 228 - US Army Installation Management Command - Pacific Region, Honolulu, Hawaii
This report documents the activities of a resource efficiency manager that served the US Army Installation Management Command - Pacific Region during the period November 23, 2009 and August 31, 2010.
Date:
September 30, 2010
Creator:
Arends, J. & Sandusky, William F.
Object Type:
Report
System:
The UNT Digital Library
Gainesville Daily Register (Gainesville, Tex.), Vol. 128, No. 23, Ed. 1 Saturday, September 30, 2017
Daily newspaper from Gainesville, Texas that includes local, state, and national news along with advertising.
Date:
September 30, 2017
Creator:
Armstrong, Mark J.
Object Type:
Newspaper
System:
The Portal to Texas History
Internet Based, GIS Catalog of Non-Traditional Sources of Cooling Water for Use at America's Coal-Fired Power Plants
In recent years, rising populations and regional droughts have caused coal-fired power plants to temporarily curtail or cease production due to a lack of available water for cooling. In addition, concerns about the availability of adequate supplies of cooling water have resulted in cancellation of plans to build much-needed new power plants. These issues, coupled with concern over the possible impacts of global climate change, have caused industry and community planners to seek alternate sources of water to supplement or replace existing supplies. The Department of Energy, through the National Energy Technology Laboratory (NETL) is researching ways to reduce the water demands of coal-fired power plants. As part of the NETL Program, ALL Consulting developed an internet-based Catalog of potential alternative sources of cooling water. The Catalog identifies alternative sources of water, such as mine discharge water, oil and gas produced water, saline aquifers, and publicly owned treatment works (POTWs), which could be used to supplement or replace existing surface water sources. This report provides an overview of the Catalog, and examines the benefits and challenges of using these alternative water sources for cooling water.
Date:
September 30, 2011
Creator:
Arthur, J. Daniel
Object Type:
Report
System:
The UNT Digital Library
Accident Analysis for the NIST Research Reactor Before and After Fuel Conversion
Postulated accidents have been analyzed for the 20 MW D2O-moderated research reactor (NBSR) at the National Institute of Standards and Technology (NIST). The analysis has been carried out for the present core, which contains high enriched uranium (HEU) fuel and for a proposed equilibrium core with low enriched uranium (LEU) fuel. The analyses employ state-of-the-art calculational methods. Three-dimensional Monte Carlo neutron transport calculations were performed with the MCNPX code to determine homogenized fuel compositions in the lower and upper halves of each fuel element and to determine the resulting neutronic properties of the core. The accident analysis employed a model of the primary loop with the RELAP5 code. The model includes the primary pumps, shutdown pumps outlet valves, heat exchanger, fuel elements, and flow channels for both the six inner and twenty-four outer fuel elements. Evaluations were performed for the following accidents: (1) control rod withdrawal startup accident, (2) maximum reactivity insertion accident, (3) loss-of-flow accident resulting from loss of electrical power with an assumption of failure of shutdown cooling pumps, (4) loss-of-flow accident resulting from a primary pump seizure, and (5) loss-of-flow accident resulting from inadvertent throttling of a flow control valve. In addition, natural circulation cooling at low …
Date:
September 30, 2012
Creator:
Baek, J.; Diamond, D.; Cuadra, A.; Hanson, A. L.; Cheng, L. Y. & Brown, N. R.
Object Type:
Report
System:
The UNT Digital Library
Internships, Fellowships, and Other Work Experience Opportunities in the Federal Government
This report describes Internet resources on major internship, fellowship, and work experience programs within the federal government. It is intended as a selective guide for students of all levels: high school, undergraduate, graduate, and postgraduate.
Date:
September 30, 2016
Creator:
Bailey, Christina M. & Manning, Jennifer E.
Object Type:
Report
System:
The UNT Digital Library
Final Report for DE-FG36-08GO18007 "All-Inorganic, Efficient Photovoltaic Solid State Devices Utilizing Semiconducting Colloidal Nanocrystal Quantum Dots"
We demonstrated robust colloidal quantum dot (QD) photovoltaics with high internal quantum efficiencies. In our structures, device durability is derived from use of all-inorganic atmospherically-stable semiconducting metal-oxide films together with QD photoreceptors. We have shown that both QD and metal-oxide semiconducting films and contacts are amenable to room temperature processing under minimal vacuum conditions, enabling large area processing of PV structures of high internal efficiency. We generated the state of the art devices with power conversion efficiency of more than 4%, and have shown that efficiencies as high as 9% are achievable in the near-term, and as high as 17% in the long-term.
Date:
September 30, 2011
Creator:
Bawendi, Vladimir Bulovic and Moungi
Object Type:
Report
System:
The UNT Digital Library
Energy and Water Development: FY2011 Appropriations
This report discusses the energy and water development appropriations bill that provides funding for civil works projects of the Army Corps of Engineers, the Department of the Interior's Bureau of Reclamation, the Department of Energy (DOE), and a number of independent agencies.
Date:
September 30, 2010
Creator:
Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library