22 Matching Results

Search Results

Advanced search parameters have been applied.

in creator/contributor: "McKellar, M.G."

open access

THE PRODUCTION OF SYNGAS VIA HIGH TEMPERATURE ELECTROLYSIS AND BIO-MASS GASIFICATION

A process model of syngas production using high temperature electrolysis and biomass gasification is presented. Process heat from the biomass gasifier is used to improve the hydrogen production efficiency of the steam electrolysis process. Hydrogen from electrolysis allows a high utilization of the biomass carbon for syngas production. Based on the gasifier temperature, 94% to 95% of the carbon in the biomass becomes carbon monoxide in the syngas (carbon dioxide and hydrogen). Assuming the ther… more

Date: November 1, 2008

Creator: McKellar, M. G.; Hawkes, G. L. & O'Brien, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Process Modeling Results of Bio-Syntrolysis: Converting Biomass to Liquid Fuel with High Temperature Steam Electrolysis

A new process called Bio-Syntrolysis is being researched at the Idaho National Laboratory (INL) investigating syngas production from renewable biomass that is assisted with high temperature steam electrolysis (HTSE). The INL is the world leader in researching HTSE and has recently produced hydrogen from high temperature solid oxide cells running in the electrolysis mode setting several world records along the way. A high temperature (~800°C) heat source is necessary to heat the steam as it goes… more

Date: June 1, 2010

Creator: Hawkes, G. L.; McKellar, M. G.; Wood, R. & Plum, M. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Modeling of thermal plasma arc technology FY 1994 report

The thermal plasma arc process is under consideration to thermally treat hazardous and radioactive waste. A computer model for the thermal plasma arc technology was designed as a tool to aid in the development and use of the plasma arc-Joule beating process. The value of this computer model is to: (a) aid in understanding the plasma arc-Joule beating process as applied to buried waste or exhumed buried waste, (b) help design melter geometry and electrode configuration, (c) calculate the process… more

Date: March 1, 1995

Creator: Hawkes, G. L.; Nguyen, H. D.; Paik, S. & McKellar, M. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

ANALYSIS OF A HIGH TEMPERATURE GAS-COOLED REACTOR POWERED HIGH TEMPERATURE ELECTROLYSIS HYDROGEN PLANT

An updated reference design for a commercial-scale high-temperature electrolysis (HTE) plant for hydrogen production has been developed. The HTE plant is powered by a high-temperature gas-cooled reactor (HTGR) whose configuration and operating conditions are based on the latest design parameters planned for the Next Generation Nuclear Plant (NGNP). The current HTGR reference design specifies a reactor power of 600 MWt, with a primary system pressure of 7.0 MPa, and reactor inlet and outlet flui… more

Date: November 1, 2010

Creator: McKellar, M. G.; Harvego, E. A. & Gandrik, A. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Results of pressure locking and thermal binding tests of gate valves

The US Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research, is funding the Idaho National Engineering and Environmental Laboratory (INEEL) in performing research investigating the performance of gate valves subjected to pressure locking and thermal binding conditions. Pressure locking and thermal binding are phenomena that make a closed gate valve difficult to open. Pressure locking can occur when operating sequences or temperature changes cause the pressure of the fluid … more

Date: May 1, 1998

Creator: DeWall, K. G.; Watkins, J. C.; McKellar, M. G. & Bramwell, D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Pressure locking test results

The U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research, is funding the Idaho National Engineering Laboratory (INEL) in performing research to provide technical input for their use in evaluating responses to Generic Letter 95-07, {open_quotes}Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves.{close_quotes} Pressure locking and thermal binding are phenomena that make a closed gate valve difficult to open. This paper discusses only the p… more

Date: June 1, 1996

Creator: DeWall, K. G.; Watkins, J. C.; McKellar, M. G. & Bramwell, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Commercial-Scale Performance Predictions for High-Temperature Electrolysis Plants Coupled to Three Advanced Reactor Types

This report presents results of system analyses that have been developed to assess the hydrogen production performance of commercial-scale high-temperature electrolysis (HTE) plants driven by three different advanced reactor – power-cycle combinations: a high-temperature helium cooled reactor coupled to a direct Brayton power cycle, a supercritical CO2-cooled reactor coupled to a direct recompression cycle, and a sodium-cooled fast reactor coupled to a Rankine cycle. The system analyses were pe… more

Date: September 1, 2007

Creator: McKellar, M. G.; O'Brien, J. E. & Herring, J. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

SYSTEM ANALYSIS OF NUCLEAR-ASSISTED SYNGAS PRODUCTION FROM COAL

A system analysis has been performed to assess the efficiency and carbon utilization of a nuclear-assisted coal gasification process. The nuclear reactor is a high-temperature helium-cooled reactor that is used primarily to provide power for hydrogen production via high-temperature electrolysis. The supplemental hydrogen is mixed with the outlet stream from an oxygen-blown coal gasifier to produce a hydrogen-rich gas mixture, allowing most of the carbon dioxide to be converted into carbon monox… more

Date: September 1, 2008

Creator: Harvego, E. A.; McKellar, M. G. & O'Brien, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

PROCESS MODEL FOR THE PRODUCTION OF SYNGAS VIA HIGH TEMPERATURE CO-ELECTROLYSIS

A process model has been developed to evaluate the potential performance of a large-scale high-temperature coelectrolysis plant for the production of syngas from steam and carbon dioxide. The coelectrolysis process allows for direct electrochemical reduction of the steam – carbon dioxide gas mixture, yielding hydrogen and carbon monoxide, or syngas. The process model has been developed using the HYSYS systems analysis code. Using this code, a detailed process flowsheet has been defined that inc… more

Date: November 1, 2007

Creator: McKellar, M. G.; O'Brien, J. E.; Stoots, C. M. & Hawkes, G. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

LIQUID BIO-FUEL PRODUCTION FROM NON-FOOD BIOMASS VIA HIGH TEMPERATURE STEAM ELECTROLYSIS

Bio-Syntrolysis is a hybrid energy process that enables production of synthetic liquid fuels that are compatible with the existing conventional liquid transportation fuels infrastructure. Using biomass as a renewable carbon source, and supplemental hydrogen from high-temperature steam electrolysis (HTSE), bio-syntrolysis has the potential to provide a significant alternative petroleum source that could reduce US dependence on imported oil. Combining hydrogen from HTSE with CO from an oxygen-blo… more

Date: November 1, 2011

Creator: Hawkes, G. L.; O'Brien, J. E. & McKellar, M. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Optimized Flow Sheet for a Reference Commercial-Scale Nuclear-Driven High-Temperature Electrolysis Hydrogen Production Plant

This report presents results from the development and optimization of a reference commercialscale high-temperature electrolysis (HTE) plant for hydrogen production. The reference plant design is driven by a high-temperature helium-cooled reactor coupled to a direct Brayton power cycle. The reference design reactor power is 600 MWt, with a primary system pressure of 7.0 MPa, and reactor inlet and outlet fluid temperatures of 540° C and 900°C, respectively. The electrolysis unit used to produce h… more

Date: November 1, 2007

Creator: McKellar, M. G.; O'Brien, J. E.; Harvego, E. A. & Herring, J. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Parametric Study Of Large-Scale Production Of Syngas Via High Temperature Co-Electrolysis

A process model has been developed to evaluate the potential performance of a largescale high-temperature co-electrolysis plant for the production of syngas from steam and carbon dioxide. The co-electrolysis process allows for direct electrochemical reduction of the steam – carbon dioxide gas mixture, yielding hydrogen and carbon monoxide, or syngas. The process model has been developed using the Honeywell UniSim systems analysis code. Using this code, a detailed process flow sheet has been def… more

Date: November 1, 2007

Creator: O'Brien, J. E.; McKellar, M. G.; Stoots, C. M.; Herring, J. S. & Hawkes, G. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

HIGH-TEMPERATURE ELECTROLYSIS FOR LARGE-SCALE HYDROGEN AND SYNGAS PRODUCTION FROM NUCLEAR ENERGY – SYSTEM SIMULATION AND ECONOMICS

A research and development program is under way at the Idaho National Laboratory (INL) to assess the technological and scale-up issues associated with the implementation of solid-oxide electrolysis cell technology for efficient high-temperature hydrogen production from steam. This work is supported by the US Department of Energy, Office of Nuclear Energy, under the Nuclear Hydrogen Initiative. This paper will provide an overview of large-scale system modeling results and economic analyses that … more

Date: May 1, 2009

Creator: O'Brien, J. E.; McKellar, M. G.; Harvego, E. A. & Stoots, C. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Development and Validation of a One-Dimensional Co-Electrolysis Model for Use in Large-Scale Process Modeling Analysis

A one-dimensional chemical equilibrium model has been developed for analysis of simultaneous high-temperature electrolysis of steam and carbon dioxide (coelectrolysis) for the direct production of syngas, a mixture of hydrogen and carbon monoxide. The model assumes local chemical equilibrium among the four process-gas species via the shift reaction. For adiabatic or specified-heat-transfer conditions, the electrolyzer model allows for the determination of coelectrolysis outlet temperature, comp… more

Date: July 1, 2007

Creator: O'Brien, J. E.; McKellar, M. G.; Hawkes, G. L. & Stoots, C. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Economic Analysis of the Reference Design for a Nuclear-Driven High-Temperature-Electrolysis Hydrogen Production Plant

A reference design for a commercial-scale high-temperature electrolysis (HTE) plant for hydrogen production was developed to provide a basis for comparing the HTE concept with other hydrogen production concepts. The reference plant design is driven by a high-temperature helium-cooled reactor coupled to a direct Brayton power cycle. The reference design reactor power is 600 MWt, with a primary system pressure of 7.0 MPa, and reactor inlet and outlet fluid temperatures of 540°C and 900°C, respect… more

Date: January 1, 2008

Creator: Harvego, E. A.; McKellar, M. G.; Sohal, M. S.; O'Brien, J. E. & Herring, J. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Economic Analysis of a Nuclear Reactor Powered High-Temperature Electrolysis Hydrogen Production Plant

A reference design for a commercial-scale high-temperature electrolysis (HTE) plant for hydrogen production was developed to provide a basis for comparing the HTE concept with other hydrogen production concepts. The reference plant design is driven by a high-temperature helium-cooled nuclear reactor coupled to a direct Brayton power cycle. The reference design reactor power is 600 MWt, with a primary system pressure of 7.0 MPa, and reactor inlet and outlet fluid temperatures of 540°C and 900°C,… more

Date: August 1, 2008

Creator: Harvego, E. A.; McKellar, M. G.; Sohal, M. S.; O'Brien, J. E. & Herring, J. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

CHALLENGES IN GENERATING HYDROGEN BY HIGH TEMPERATURE ELECTROLYSIS USING SOLID OXIDE CELLS

Idaho National Laboratory’s (INL) high temperature electrolysis research to generate hydrogen using solid oxide electrolysis cells is presented in this paper. The research results reported here have been obtained in a laboratory-scale apparatus. These results and common scale-up issues also indicate that for the technology to be successful in a large industrial setting, several technical, economical, and manufacturing issues have to be resolved. Some of the issues related to solid oxide cells a… more

Date: March 1, 2008

Creator: Sohal, M. S.; O'Brien, J. E.; Stoots, C. M.; McKellar, M. G.; Herring, J. S. & Harvego, E. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

High Temperature Electrolysis for Hydrogen Production from Nuclear Energy – TechnologySummary

The Department of Energy, Office of Nuclear Energy, has requested that a Hydrogen Technology Down-Selection be performed to identify the hydrogen production technology that has the best potential for timely commercial demonstration and for ultimate deployment with the Next Generation Nuclear Plant (NGNP). An Independent Review Team has been assembled to execute the down-selection. This report has been prepared to provide the members of the Independent Review Team with detailed background inform… more

Date: February 1, 2010

Creator: O'Brien, J. E.; Stoots, C. M.; Herring, J. S.; McKellar, M. G.; Harvego, E. A.; Sohal, M. S. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Technical issues associated with in situ vitrification of the INEL Subsurface Disposal Area. Volume 3, Application of technical issues to the TRU-contaminated pits and trenches

In situ vitrification (ISV) has been identified as an alternative technology for remediation of the acid pit and transuranic pits and trenches (TRU-PTs) at the Idaho National Engineering Laboratory (INEL) Subsurface Disposal Area (SDA). However, a number of technical issues must be resolved before ISV can be considered applicable to these waste sites. To assist in the ISV technology evaluation, an ISV Steering Committee was formed to identify, prioritize, and develop closure roadmaps for techni… more

Date: July 1, 1992

Creator: Stoots, C. M.; Bates, S. O.; Callow, R. A.; Campbell, K. A.; Farnsworth, R. K.; Krisman, G. K. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Technical issues associated with in situ vitrification of the INEL Subsurface Disposal Area. Volume 1, A systematic approach for identification, prioritization, and closure of technical issues

In situ vitrification (ISV) has been identified as an alternative technology for remediation of the Acid Pit and Transuranic Pits and Trenches (TRU-PTs) that are present at the Idaho National Engineering Laboratory (INEL) Subsurface Disposal Area (SDA). However, a number of technical issues exist that must be resolved before ISV can be considered applicable to these waste sites. To assist in the ISV technology evaluation, an ISV Steering Committee was formed to identify, prioritize, and develop… more

Date: December 1, 1991

Creator: Stoots, C. M.; Bates, S. O.; Callow, R. A.; Campbell, K. A.; Farnsworth, R. K.; Gratson, G. K. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Technical issues associated with in situ vitrification of the INEL Subsurface Disposal Area

Date: July 1, 1992

Creator: Stoots, C. M.; Bates, S. O.; Callow, R. A.; Campbell, K. A.; Farnsworth, R. K.; Krisman, G. K. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Status of the INL high-temperature electrolysis research program –experimental and modeling

This paper provides a status update on the high-temperature electrolysis (HTE) research and development program at the Idaho National Laboratory (INL), with an overview of recent large-scale system modeling results and the status of the experimental program. System analysis results have been obtained using the commercial code UniSim, augmented with a custom high-temperature electrolyzer module. The process flow diagrams for the system simulations include an advanced nuclear reactor as a source … more

Date: April 1, 2009

Creator: O'Brien, J. E.; Stoots, C. M.; McKellar, M. G.; Harvego, E. A.; Condie, K. G.; Housley, G. K. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department