会议论文详细信息
the 17th Annual Conference on Fossil Energy Materials
DEVELOPMENT OF METALLIC HOT GAS FILTERS
I. E. Anderson ; B. Gleeson ; R. L. Terpstra
Others  :  http://www.netl.doe.gov/publications/proceedings/03/materials/manuscripts/Anderson_m.pdf
PID  :  49004
来源: CEUR
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【 摘 要 】

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.Support is gratefully acknowledged from DOE-FE (ARM) through Ames Lab contract No. W-7405-Eng-82.

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