Effect of pulsation on black liquor gasification. Final report

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Description

Pyrolysis is an endothermic process. The heat of reaction is provided either by partial combustion of the waste or by heat transfer from an external combustion process. In one proposed system black liquor is pyrolized in a fluidized bed to which heat is added through a series of pulse combustor tail pipes submerged in the bed material. This system appears promising because of the relatively high heat transfer in pulse combustors and in fluidized beds. Other advantages of pulse combustors are discussed elsewhere. The process is, however, only economically viable if a part of the pyrolysis products can be used ... continued below

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51 p.

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Zinn, B. T.; Jagoda, J.; Jeong, H.; Kushari, A. & Rosen, L. J. December 1, 1998.

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Description

Pyrolysis is an endothermic process. The heat of reaction is provided either by partial combustion of the waste or by heat transfer from an external combustion process. In one proposed system black liquor is pyrolized in a fluidized bed to which heat is added through a series of pulse combustor tail pipes submerged in the bed material. This system appears promising because of the relatively high heat transfer in pulse combustors and in fluidized beds. Other advantages of pulse combustors are discussed elsewhere. The process is, however, only economically viable if a part of the pyrolysis products can be used to fire the pulse combustors. The overall goals of this study were to determine: (1) which is the limiting heat transfer rate in the process of transferring heat from the hot combustion products to the pipe, through the pipe, from the tail pipe to the bed and through the bed; i.e., whether increased heat transfer within the pulse combustor will significantly increase the overall heat transfer rate; (2) whether the heat transfer benefits of the pulse combustor can be utilized while maintaining the temperature in the bed within the narrow temperature range required by the process without generating hot spots in the bed; and (3) whether the fuel gas produced during the gasification process can be used to efficiently fire the pulse combustor.

Physical Description

51 p.

Notes

OSTI as DE99001482

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  • Other Information: PBD: Dec 1998

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  • Other: DE99001482
  • Report No.: DOE/AL/94649--T2
  • Grant Number: FG04-93AL94649
  • DOI: 10.2172/307829 | External Link
  • Office of Scientific & Technical Information Report Number: 307829
  • Archival Resource Key: ark:/67531/metadc686929

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  • December 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Jan. 17, 2018, 1:18 p.m.

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Zinn, B. T.; Jagoda, J.; Jeong, H.; Kushari, A. & Rosen, L. J. Effect of pulsation on black liquor gasification. Final report, report, December 1, 1998; Atlanta, Georgia. (digital.library.unt.edu/ark:/67531/metadc686929/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.