Topic Area 3 - Materials Topics; Sub-Topic 3.4: Effects of Sulfur and Water Vapor on TBC's Coatings

The summary for the Topic Area 3 - Materials Topics; Sub-Topic 3.4: Effects of Sulfur and Water Vapor on TBC's Coatings grant is detailed below. This summary states who is eligible for the grant, how much grant money will be awarded, current and past deadlines, Catalog of Federal Domestic Assistance (CFDA) numbers, and a sampling of similar government grants. Verify the accuracy of the data provides by visiting the webpage noted in the Link to Full Announcement section or by contacting the appropriate person listed as the Grant Announcement Contact. If any section is incomplete, please visit the website for the National Energy Technology Laboratory, which is the U.S. government agency offering this grant.
Topic Area 3 - Materials Topics; Sub-Topic 3.4: Effects of Sulfur and Water Vapor on TBC's Coatings: NOTE: This descriptive area provides an overview of Technical Topic Area 3: Sub-Topic 3.4: Effects of Sulfur and Water Vapor on TBC's Coatings only. YOU MUST READ THE ENTIRE FUNDING OPPORTUNITY ANNOUNCEMENT DOCUMENT FOR ADDITIONAL INFORMATION, EVALUATION CRITERIA AND INSTRUCTIONS ON HOW TO PREPARE AN APPLICATION UNDER Technical Sub-Topic Areas. Please scroll to the bottom of this page to access the Funding Opportunity Announcement. Topic Area 3 - Materials Topics Even though limited IGCC plant data on measured syngas impurities indicate lower levels of critical ash constituents (e.g., Na, K, Ca) than limits from turbine fuel specifications, greater materials degradation (corrosion, erosion, and deposition) has occurred in at least some IGCC plant turbines to date than for the same model turbines operated with conventional fuels such as natural gas. For properly designed and operated syngas cleanup systems, no forced turbine outages resulting from hot section materials degradation associated with syngas appear to be reported at IGCC plants. However, at least in some cases, hot section coatings, vanes, and blades have needed replacement during routine maintenance shutdowns at more frequent intervals than for natural gas fired turbines. For example, analyses of IGCC turbine first rotor blades have shown that, at some locations, surface reactions were radically different in nature and more severe than typically observed in turbines operating with conventional fuels. These areas appeared to experience a combination of sulfidation and oxidation. However, the mechanisms leading to this attack are uncertain because partial pressures of sulfur containing gases in the syngas combustion products do not appear to be as high as required to produce materials sulfidation. Also, Thermal Barrier Coatings (TBC's) in IGCC turbines have experienced deposition and spallation and sometimes needed replacement at more frequent intervals than for natural gas fired turbines. Analyses have indicated that iron oxides (e.g., Fe2O3) have been primary constituents of deposits on the TBC's, which also penetrated into the TBC porosity. The presence of other ash elements (e.g., Si, Al, Ca, Mg, Na, K and sulfate ions) has also been detected. These deposits are different in composition than deposits consisting of calcium, magnesium, aluminum, and silicon (CMAS) that have caused past degradation of airborne turbine TBC's. The following sequence of materials research topics are directed to first understanding the nature of degradations to date in IGCC turbines, identifying approaches to alleviate these degradations, and then using these insights as a starting knowledge base for evaluations of materials for turbines using HHC fuels derived from coal gasification. Sub-Topic 3.4: Effects of Sulfur and Water Vapor on TBC's Coatings (DE-PS26-08NT00165-3D) The very high water vapor levels (up to 25%) and limited gaseous sulfur (e.g., SO2) levels for future turbines that operate HHC fuels are also expected to affect thermal barrier coatings. Possible effects include altering the formation the thermally grown oxide scale at the bond coat interface and also the sintering of the YSZ. Consequently, experiments and analyses are needed to identify the acceptable operating ranges of SOx, and surface temperatures for candidate turbine TBC's (APS, EB-PVD, bond coats) for water vapor levels ranging up to 25%. These evaluations should explore operating bounds for water vapor, SOx, and surface temperatures considering the effects on both coating durability and thermal conductivity.
Federal Grant Title: Topic Area 3 - Materials Topics; Sub-Topic 3.4: Effects of Sulfur and Water Vapor on TBC's Coatings
Federal Agency Name: National Energy Technology Laboratory
Grant Categories: Energy
Type of Opportunity: Discretionary
Funding Opportunity Number: DE-PS26-08NT00165-3D
Type of Funding: Cooperative Agreement
CFDA Numbers: 81.089
CFDA Descriptions: Fossil Energy Research and Development
Current Application Deadline: No deadline provided
Original Application Deadline: Apr 16, 2008
Posted Date: Mar 11, 2008
Creation Date: Mar 11, 2008
Archive Date: Jul 11, 2008
Total Program Funding:
Maximum Federal Grant Award: $500,000
Minimum Federal Grant Award: $100,000
Expected Number of Awards:
Cost Sharing or Matching: Yes
Applicants Eligible for this Grant
Private institutions of higher education Public and State controlled institutions of higher education
Link to Full Grant Announcement
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Raymond Johnson If you have any problems linking to the funding opportunity please contact the IIPS HelpDesk
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