New developments in gasifier refractories

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For Integrated Gasification Combined Cycle (IGCC) systems, operational reliability depends in part upon the ability of the materials of construction to tolerate harsh, high-temperature environments for extended periods of time. The harshest conditions within an IGCC system occur inside the gasifier itself, where for slagging systems the environment includes elevated temperature and pressure, as well as the presence of corrosive slags and gases. Attempts to enhance gasifier performance by operating at higher temperatures, with higher throughputs, and/or with variable feedstocks, put additional stress on the materials exposed to the operating environment, often resulting in a corresponding decrease in their useful ... continued below

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Dogan, Cynthia P.; Kwong, Kyei-Sing; Bennet, James P.; Chinn, Richard E. & Dahlin, Cheryl L. January 1, 2002.

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Description

For Integrated Gasification Combined Cycle (IGCC) systems, operational reliability depends in part upon the ability of the materials of construction to tolerate harsh, high-temperature environments for extended periods of time. The harshest conditions within an IGCC system occur inside the gasifier itself, where for slagging systems the environment includes elevated temperature and pressure, as well as the presence of corrosive slags and gases. Attempts to enhance gasifier performance by operating at higher temperatures, with higher throughputs, and/or with variable feedstocks, put additional stress on the materials exposed to the operating environment, often resulting in a corresponding decrease in their useful service life. Current generation refractory materials commonly used at the hot face of commercial slagging systems will typically last from four to 18 months, depending on the operating conditions of the specific gasifier. However, as gasification technology matures, the need for new and improved materials will increase as the time between required maintenance shutdowns, and hence the economics and reliability of operation, are defined more and more by the service life of the materials from which the system is built. To address this need for materials development, the U.S. Department of Energy's Office of Fossil Energy and the Albany Research Center are exploring ways to extend the service life of the refractory liner that contains the gasification reaction in slagging gasifiers. In this paper, we examine how refractory materials fail in the gasifier environment, and introduce a new refractory designed specifically to resist such failures. Based on laboratory exposure tests, this new refractory is predicted to significantly enhance gasifier reliability and availability through increased service life.

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From conference sponsor's website: www.gasification.org/Docs/2002_Papers/GTC02042.pdf

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  • Gasification Technologies 2002 Conference, San Francisco, CA, Oct. 27-30, 2002

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  • Report No.: DOE/ARC-2003-034
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 899596
  • Archival Resource Key: ark:/67531/metadc887470

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  • January 1, 2002

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 2:09 p.m.

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Dogan, Cynthia P.; Kwong, Kyei-Sing; Bennet, James P.; Chinn, Richard E. & Dahlin, Cheryl L. New developments in gasifier refractories, article, January 1, 2002; (digital.library.unt.edu/ark:/67531/metadc887470/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.