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Kinetic Analysis of C4 Alkane and Alkene Pyrolysis: Implications for SOFC Operation

[+] Author Affiliations
Ahmed Al Shoaibi, Anthony M. Dean

Colorado School of Mines, Golden, CO

Paper No. FuelCell2008-65033, pp. 143-153; 11 pages
doi:10.1115/FuelCell2008-65033
From:
  • ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology
  • Denver, Colorado, USA, June 16–18, 2008
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4318-1 | eISBN: 0-7918-3822-6
  • Copyright © 2008 by ASME

abstract

Pyrolysis experiments of isobutane, isobutylene, and 1-butene were performed over a temperature range of 550–750 °C and a pressure of ∼ 0.8 atm. The residence time was ∼ 5 s. The fuel conversion and product selectivity were analyzed at these temperatures. The pyrolysis experiments were performed to simulate the gas phase chemistry that occurs in the anode channel of a solid-oxide fuel cell. The experimental results confirm that molecular structure has a substantial impact on pyrolysis kinetics. The experimental data show considerable amounts of C5 and higher species (∼2.8 mole % with isobutane at 750 °C, ∼7.5 mole % with isobutylene at 737.5 °C, and ∼7.4 mole % with 1-butene at 700 °C). The C5 + species are likely deposit precursors. The results confirm that hydrocarbon gas phase kinetics have substantial impact on SOFC operation.

Copyright © 2008 by ASME

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