DEVELOPMENT OF METALLIC HOT GAS FILTERS

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Description

Successful development of metallic filters with high temperature oxidation/corrosion resistance for fly ash capture is a key to enabling advanced coal combustion and power generation technologies. Compared to ceramic filters, metallic filters can offer increased resistance to impact and thermal fatigue, greatly improving filter reliability. A beneficial metallic filter structure, composed of a thin-wall (0.5mm) tube with uniform porosity (about 30%), is being developed using a unique spherical powder processing and partial sintering approach, combined with porous sheet rolling and resistance welding. Alloy choices based on modified superalloys, e.g., Ni-16Cr-4.5Al-3Fe (wt.%), are being tested in porous and bulk samples for ... continued below

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12 pages

Creation Information

Anderson, I.E.; Gleeson, B. & Terpstra, R.L. April 23, 2003.

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Description

Successful development of metallic filters with high temperature oxidation/corrosion resistance for fly ash capture is a key to enabling advanced coal combustion and power generation technologies. Compared to ceramic filters, metallic filters can offer increased resistance to impact and thermal fatigue, greatly improving filter reliability. A beneficial metallic filter structure, composed of a thin-wall (0.5mm) tube with uniform porosity (about 30%), is being developed using a unique spherical powder processing and partial sintering approach, combined with porous sheet rolling and resistance welding. Alloy choices based on modified superalloys, e.g., Ni-16Cr-4.5Al-3Fe (wt.%), are being tested in porous and bulk samples for oxide (typically alumina) scale stability in simulated oxidizing/sulfidizing atmospheres found in PFBC and IGCC systems at temperatures up to 850 C. Recent ''hanging o-ring'' exposure tests in actual combustion systems at a collaborating DOE site (EERC) have been initiated to study the combined corrosive effects from particulate deposits and hot exhaust gases. New studies are exploring the correlation between sintered microstructure, tensile strength, and permeability of porous sheet samples.

Physical Description

12 pages

Notes

OSTI as DE00835683

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  • 17th Annual Conference on Fossil Energy Materials, Baltimore, MD (US), 04/22/2003--04/24/2003

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  • Report No.: none
  • Grant Number: W-7405-Eng-82
  • Office of Scientific & Technical Information Report Number: 835683
  • Archival Resource Key: ark:/67531/metadc786440

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  • April 23, 2003

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • Aug. 8, 2016, 4:03 p.m.

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Anderson, I.E.; Gleeson, B. & Terpstra, R.L. DEVELOPMENT OF METALLIC HOT GAS FILTERS, article, April 23, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc786440/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.