Reactivity of young chars via energetic distribution measurements

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In this report, we present some preliminary work performed on the effect of CO{sub 2} partial pressure on temperature programmed desorption spectra from CO{sub 2}-oxidized chars. The following was accomplished during the reporting period: Temperature programmed desorption (TPD) experiments were conducted on oxidized resin and Wyodak coal char samples gasified under varying different CO{sub 2} partial pressures. The following observations were made: CO{sub 2} partial pressure can be an important factor affecting TPD spectra. Generally, the total amount of surface oxygen desorbed as CO and CO{sub 2} increases with CO{sub 2} partial pressure during gasification for both resin char and ... continued below

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Pages: (15 p)

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Calo, J.M.; Zhang, L.H.; Rachel, W.G. & Lilly, W.D. January 1, 1991.

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Description

In this report, we present some preliminary work performed on the effect of CO{sub 2} partial pressure on temperature programmed desorption spectra from CO{sub 2}-oxidized chars. The following was accomplished during the reporting period: Temperature programmed desorption (TPD) experiments were conducted on oxidized resin and Wyodak coal char samples gasified under varying different CO{sub 2} partial pressures. The following observations were made: CO{sub 2} partial pressure can be an important factor affecting TPD spectra. Generally, the total amount of surface oxygen desorbed as CO and CO{sub 2} increases with CO{sub 2} partial pressure during gasification for both resin char and Wyodak coal char. The total amount of oxygen desorbed is also a function of gasification temperature. Apparently, the higher the gasification temperature, the more CO and CO{sub 2} are desorbed. As an example, for 0.33 atm CO{sub 2} partial pressure, the peak CO desorption rates are 0.17 mmole/g/min and 0.13 mmole/g/min, corresponding to gasification temperature 1223K and 1173K. 12 refs., 8 figs.

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Pages: (15 p)

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  • Other: DE92002130
  • Report No.: DOE/PC/90307-3
  • Grant Number: FG22-90PC90307
  • DOI: 10.2172/5122176 | External Link
  • Office of Scientific & Technical Information Report Number: 5122176
  • Archival Resource Key: ark:/67531/metadc1057297

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  • January 1, 1991

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  • Jan. 22, 2018, 7:23 a.m.

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  • Jan. 29, 2018, 12:13 p.m.

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Calo, J.M.; Zhang, L.H.; Rachel, W.G. & Lilly, W.D. Reactivity of young chars via energetic distribution measurements, report, January 1, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1057297/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.