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Advanced Amine Solvent Formulations and Process Integration for Near-Term CO2 Capture Success

Description: This Phase I SBIR project investigated the economic and technical feasibility of advanced amine scrubbing systems for post-combustion CO2 capture at coal-fired power plants. Numerous combinations of advanced solvent formulations and process configurations were screened for energy requirements, and three cases were selected for detailed analysis: a monoethanolamine (MEA) base case and two “advanced” cases: an MEA/Piperazine (PZ) case, and a methyldiethanolamine (MDEA) / PZ case. The MEA/PZ and M… more
Date: June 28, 2007
Creator: Fisher, Kevin S.; Searcy, Katherine; Rochelle, Gary T.; Ziaii, Sepideh & Schubert, Craig
Partner: UNT Libraries Government Documents Department
open access

Research and Development of an Integral Separator for a Centrifugal Gas Processing Facility

Description: A COMPACT GAS PROCESSING DEVICE WAS INVESTIGATED TO INCREASE GAS PRODUCTION FROM REMOTE, PREVIOUSLY UN-ECONOMIC RESOURCES. THE UNIT WAS TESTED ON AIR AND WATER AND WITH NATURAL GAS AND LIQUID. RESULTS ARE REPORTED WITH RECOMMENDATIONS FOR FUTURE WORK.
Date: February 27, 2007
Creator: Hays, Lance
Partner: UNT Libraries Government Documents Department
open access

Development of Improved Iron-Aluminide Filter Tubes and Elements

Description: The purpose of this Cooperative Research and Development Agreement (CRADA) was to explore and develop advanced manufacturing techniques to fabricate sintered iron-aluminide intermetallic porous bodies used for gas filtration so as to reduce production costs while maintaining or improving performance in advanced coal gasification and combustion systems. The use of a power turbine fired with coal-derived synthesis gas requires some form of gas cleaning in order to protect turbine and downstream c… more
Date: January 14, 2008
Creator: Judkins, R. R.; Sutton, T. G.; Miller, C. J. & Tortorelli, P. F.
Partner: UNT Libraries Government Documents Department
open access

Enzymatic Upgrading of Heavy Crudes via Partial Oxidation or Conversion of PAHs

Description: The objective of this program was to investigate new enzyme-based technologies for upgrading of heavy oils. Enzymes were selected for screening from those capable of conversion of polyaromatic hydrocarbons (PAHs) reported in the literature. Oxidative reactions of PAHs using hydrogen peroxide as an oxidant with conversion to partially oxidized products were used. The enzymes (lignin peroxidase, cytochrome c) were tested in various organic solvents and found to loose activity in pure organic solv… more
Date: July 1, 2002
Creator: Borole, A. P.; Davison, B. H. & Kuritz, T.
Partner: UNT Libraries Government Documents Department
open access

Intelligent Machine Learning Analysis for Fuel Cell Operations

Description: A performance computational model for a 100 kW nominal solid oxide fuel cell generator system is described. The calculational methods are based on the FORTRAN programming language. Comprehensive parameter input options are presented, and constraints are identified. Example reactant, electrical, and efficiency outputs are demonstrated over the relevant operating ranges. A sample calculated output display at nominal operating conditions is given.
Date: June 30, 2000
Creator: Murphy, R. W. & Hoyt, W. A.
Partner: UNT Libraries Government Documents Department
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Development of regenerable copper-based sorbents for hot gas cleanup: Final technical report, September 1, 1995--August 31, 1996

Description: The overall objective of this study was to determine the effectiveness of the copper-chromite sorbent (developed in previous ICCI-funded projects) for longer duration application under optimum conditions in the temperature range of 550{degrees}-650{degrees}C to minimize sorbent reduction and degradation during the cyclic process. Three (3) formulations of attrition resistant granules of the copper chromite sorbent (i.e., CuCr-10, CuCr-21, and CuCr-29) as well as one (1) copper chromite sorbent … more
Date: May 1, 1997
Creator: Abbasian, Javad; Slimane, Rachid B. & Wangerow, James R.
Partner: UNT Libraries Government Documents Department
open access

Task 1: Steam Oxidation,”

Description: Need to improve efficiency, decrease emissions (esp. CO2) associated with the continued use of coal for power generation
Date: March 1, 2009
Creator: Wright, I. G. & Holcomb, G. R.
Partner: UNT Libraries Government Documents Department
open access

Surface characterizatin of palladium-alumina sorbents for high-temperature capture of mercury and arsenic from fuel gas

Description: Coal gasification with subsequent cleanup of the resulting fuel gas is a way to reduce the impact of mercury and arsenic in the environment during power generation and on downstream catalytic processes in chemical production, The interactions of mercury and arsenic with PdlAl2D3 model thin film sorbents and PdlAh03 powders have been studied to determine the relative affinities of palladium for mercury and arsenic, and how they are affected by temperature and the presence of hydrogen sulfide in … more
Date: January 1, 2010
Creator: Baltrus, J. P.; Granite, E. J.; Pennline, H. W.; Stanko, D.; Hamilton, H.; Rowsell, L. et al.
Partner: UNT Libraries Government Documents Department
open access

Designing Microporus Carbons for Hydrogen Storage Systems

Description: An efficient, cost-effective hydrogen storage system is a key enabling technology for the widespread introduction of hydrogen fuel cells to the domestic marketplace. Air Products, an industry leader in hydrogen energy products and systems, recognized this need and responded to the DOE 'Grand Challenge' solicitation (DOE Solicitation DE-PS36-03GO93013) under Category 1 as an industry partner and steering committee member with the National Renewable Energy Laboratory (NREL) in their proposal for … more
Date: May 2, 2012
Creator: Cooper, Alan C.
Partner: UNT Libraries Government Documents Department
open access

Task 1—Steam Oxidation (NETL-US)

Description: The proposed steam in let temperature in the Advanced Ultra Supercritical (A·USC) steam turbine is high enough (760°C) Ihat traditional turbine casing and valve body materials such as ferr;tic/manensitic steels will not suffice due to temperature lim itations of this class of materials. Cast versions of three traditionally wrought Ni-based superalloys (Haynes 263. Haynes 282, and Nimonic 105) were evaluated for use as casing or valve components for the next generation of industrial steam turbin… more
Date: May 1, 2010
Creator: Holcomb, G. R.
Partner: UNT Libraries Government Documents Department
open access

Hydrogen Dissociation on Pd4S Surfaces

Description: Exposure of Pd-based hydrogen purification membranes to H,S. a common contaminant in coal gasification streams, can cause membrane performance to deteriorate, either by deactivating surface sites required for dissociative H, adsorption or by forming a low-permeability sulfide scale. In this work. the composition, structure, and catalytic activity of Pd4S, a surface scale commonly observed in Pd-membrane separation of hydrogen from sulfur-containing gas streams, were examined using a combination… more
Date: January 1, 2009
Creator: Miller, J. B.; Alfonso, D. R.; Howard, B. H.; O'Brien, C. P. & Morreale, B. D.
Partner: UNT Libraries Government Documents Department
open access

Towards Long-Term Corrosion Resistance in FE Service Environments

Description: The push for carbon capture and sequestration for fossil fuel energy production has materials performance challenges in terms of high temperature oxidation and corrosion resistance. Such challenges will be illustrated with examples from several current technologies that are close to being realized. These include cases where existing technologies are being modified—for example fireside corrosion resulting from increased corrosivity of flue gas in coal boilers refit for oxy-fuel combustion, or st… more
Date: October 1, 2010
Creator: Holcomb, G. R. & Wang, P.
Partner: UNT Libraries Government Documents Department
open access

First-principles studies of H2S adsorption and dissociation on metal surfaces

Description: Exposure of Pd-based hydrogen purification membranes to H,S. a common contaminant in coal gasification streams, can cause membrane performance to deteriorate, either by deactivating surface sites required for dissociative H, adsorption or by forming a low-permeability sulfide scale. In this work. the composition, structure, and catalytic activity of Pd4S, a surface scale commonly observed in Pd-membrane separation of hydrogen from sulfur-containing gas streams, were examined using a combination… more
Date: January 1, 2008
Creator: Alfonso, D.R.
Partner: UNT Libraries Government Documents Department
open access

Multiobjective Optimization Power Generation Systems Involving Chemical Looping Combustion

Description: Integrated Gasification Combined Cycle (IGCC) system using coal gasification is an important approach for future energy options. This work focuses on understading the system operation and optimizing it in the presence of uncertain operating conditions using ASPEN Plus and CAPE-OPEN compliant stochastic simulation and multiobjective optimization capabilities developed by Vishwamitra Research Institute. The feasible operating surface for the IGCC system is generated and deterministic multiobjecti… more
Date: January 1, 2009
Creator: Salazar, Juan M.; Diwekar, Urmila M. & Zitney, Stephen E.
Partner: UNT Libraries Government Documents Department
open access

Measurement of Interfacial Area Production and Permeability within Porous Media

Description: An understanding of the pore-level interactions that affect multi-phase flow in porous media is important in many subsurface engineering applications, including enhanced oil recovery, remediation of dense non-aqueous liquid contaminated sites, and geologic CO2 sequestration. Standard models of two-phase flow in porous media have been shown to have several shortcomings, which might partially be overcome using a recently developed model based on thermodynamic principles that includes interfacial … more
Date: January 1, 2010
Creator: Crandall, Dustin; Ahmadi, Goodarz & Smith, Duane H.
Partner: UNT Libraries Government Documents Department
open access

Steam Oxidation and Chromia Evaporation in Ultra-Supercritical Steam Boilers and Turbines

Description: U.S. Department of Energy’s goals include power generation from coal at 60% efficiency, which requires steam conditions of up to 760 °C and 340 atm, so-called ultra-supercritical (USC) conditions. Evaporation of protective chromia scales is expected to be a primary corrosion mechanism. A methodology to calculate Cr evaporation rates from chromia scales was developed and combined with Cr diffusion calculations within the alloy (with a constant flux of Cr leaving the alloy from evaporation) to pr… more
Date: January 1, 2009
Creator: Holcomb, Gordon H.
Partner: UNT Libraries Government Documents Department
open access

Effect of palladium dispersion on the capture of toxic components from fuel gas by palladium-alumina sorbents

Description: The dispersion and location of Pd in alumina-supported sorbents prepared by different methods was found to influence the performance of the sorbents in the removal of mercury, arsine, and hydrogen selenide from a simulated fuel gas. When Pd is well dispersed in the pores of the support, contact interaction with the support is maximized, Pd is less susceptible to poisoning by sulfur. and the sorbent has better long-term activity for adsorption of arsine and hydrogen selenide. but poorer adsorpti… more
Date: January 1, 2011
Creator: Baltrus, J. P.; Granite, E. J.; Rupp, E. C.; Stanko, D. C.; Howard, B. & Pennline, H. W.
Partner: UNT Libraries Government Documents Department
open access

Cast Alloys for Advanced Ultra Supercritical Steam Turbines

Description: The proposed steam inlet temperature in the Advanced Ultra Supercritical (A-USC) steam turbine is high enough (760 °C) that traditional turbine casing and valve body materials such as ferritic/martensitic steels will not suffice due to temperature limitations of this class of materials. Cast versions of several traditionally wrought Ni-based superalloys were evaluated for use as casing or valve components for the next generation of industrial steam turbines. The full size castings are substanti… more
Date: May 1, 2010
Creator: Holcomb, G. R.; Wang, P.; Jablonski, P. D. & Hawk, J. A.
Partner: UNT Libraries Government Documents Department
open access

High Temperature Annealing Studies on the Piezoelectric Properties of Thin Aluminum Nitride Films

Description: A Rapid Thermal Annealing (RTA) system was used to anneal sputtered and MOVPE grown Aluminum Nitride (AlN) thin films at temperatures up to 1000°C in ambient and controlled environments. According to Energy Dispersive X-Ray Analysis (EDAX), the films annealed in an ambient environment rapidly oxidize after five minutes at 1000°C. Below 1000°C the films oxidized linearly as a function of annealing temperature which is consistent with what has been reported in literature [1]. Laser Doppler Vibrom… more
Date: May 1, 2008
Creator: Farrell, R.; Pagan, V. R.; Kabulski, A.; Kuchibhatl, Sridhar; Harman, J.; Kasarla, K. R. et al.
Partner: UNT Libraries Government Documents Department
open access

Task 2: Boiler Corrosion,

Description: For continued use of coal for power generation, there are needs to: –Improve efficiency –Decrease emissions (esp. CO2) –Use alternate fuels or fuel mixes
Date: April 1, 2009
Creator: Holcomb, G. R.; Covino, B. S., Jr.; Shim, H.-S.; Davis, K.; Eden, D. A.; White, M. et al.
Partner: UNT Libraries Government Documents Department
open access

Cast Alloys for Advanced Ultra Supercritical Steam Turbines

Description: Develop advanced coal-based power systems capable of 45–50 % efficiency at <$1,000/kW (in 2002 dollars). Develop technologies for capture and sequestration of CO2 that result in: • <10% increase in the cost of electricity in an IGCC-based plant • <35% increase in the cost of electricity for pulverized coal boilers Demonstrate coal-based energy plants that offer near-zero emissions (including CO2) with multiproduct production
Date: October 1, 2010
Creator: Holcomb, G. R. & Wang, P.
Partner: UNT Libraries Government Documents Department
open access

Surface characterization of Pd/Al2O3 sorbents for mercury capture from fuel gas

Description: The surface composition of a series of Pd/alumina sorbents has been characterized to better understand the factors influencing their ability to adsorb mercury from fuel gas. Both a temperature effect and a dispersion effect were found. Maximum adsorption of Hg occurred at the -lowest temperature tested, 204°C, and decreased with increasing temperatures. Maximum adsorption of Hg on a per-atom basis of Pd is observed at low loadings of Pd ( < 8.5% Pd) due to better dispersion of Pd at those loadi… more
Date: January 1, 2008
Creator: Baltrus, J. P.; Granite, E. J.; Stanko, D. C. & Pennline, H. W.
Partner: UNT Libraries Government Documents Department
open access

Synthesis and rheological properties of cation-exchanged Laponite suspensions

Description: In this paper we report our new approach to synthesize cation-exchanged Laponite suspensions. General observations of the prepared samples indicated that an aqueous suspension of 1 wt% Laponite retained its free flowing liquid phase characteristics even after aging for several weeks. When bivalent cationic metals (Cu, Co, Ni) were ablated into the suspension, the strong charge of the crystal face was reduced and, on standing, the suspension gelled becoming highly viscous. This sol-gel transitio… more
Date: January 1, 2009
Creator: Tran, X.P.; Howard, B. & Chyu, M.K.
Partner: UNT Libraries Government Documents Department
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