Available Technology

Chromia Refractory Brick with Carbon Treatment for Resistance to Slag Penetration in Gasifier Environments

Research is active on the development of a chromia refractory brick composed principally of Cr2O3, Al2O3, and carbon deposits for operation in the slagging environment of a gasifier operating at temperatures between 1250oC and 1575oC, pressures between 300 and 1000 psi, and oxygen partial pressures between 10-4and 10-10. This invention is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory (NETL).
Gasification is a high temperature/pressure chemical process is used to convert a carbon feedstock in to CO and H2for use in power generation and the production of chemicals. It is also a source of hydrogen. Gasifiers are processing vessels containing high temperatures and pressures. They are also being considered as a critical component of advanced power generation technologies that target near zero emissions because they facilitate efficient CO2capture for storage or reuse. During gasification, impurities in the carbon feedstock liquify, forming a slag that attacks the refractory liner used to protect the high-pressure containment shell where gasification occurs, resulting in significant wear, reduced service life, and replacement costs. This technology can provide a porous high chromia refractory brick for gasifier environments where slag penetration is mitigated through use of carbon arranged in a manner compatible with the high chromium content of the refractory brick, reducing significant decreases in material performance.
The technology provides a way to mitigate penetration of slag into the refractory, reducing structural spalling in gasifiersthereby lengthening the service life of gasifiers -The new material is compatible with the high chromium content of refractory bricks used in typical gasifiers -The ceramically-bonded Cr2O3porous brick has carbon within its pores that acts as a component in an air-cooled slagging gasifier where high chrome oxide content materials are advantageous
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