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Removal of carbonyl sulfide and hydrogen sulfide from synthesis gas byChlorobium thiosulfatophilum

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Abstract

The anaerobic, photosynthetic bacteriumChlorobium thiosulfatophilum utilizes CO2 as its carbon source and operates at the mesophilic temperature of 30‡C. It requires incandescent light for growth and compounds such as H2S, S‡, S2O3 2−, or H2 as a source of electrons. Of these compounds, H2S as sulfide is the preferred electron donor, with other compounds utilized only when sulfide has been depleted from the medium. The organism is also capable of indirectly utilizing carbonyl sulfide (COS), since COS reacts with water to form CO2 and H2S. This work presents kinetic information on the rate of growth ofC. thiosulfatophilum, as well as the rates of uptake of both H2S and COS. The growth is dependent on light intensity according to a Monod type relationship.

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Abbreviations

B, Constant:

h−1 lux

Io :

Light intensity, lux

Kt :

Constant lux

Μ:

Specific growth rate, h−1

Μm :

Maximum specific growth rate, h−1 (Constant in Eq. (5))

Μ′m :

Maximum specific growth rate, h−1 (Constant in Eq. (6))

X:

Dry weight cell concentration, mg 1−1

Xo :

Initial dry weight cell concentration, mg 1−1

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Authors and Affiliations

  1. Department of Chemical Engineering, University of Arkansas, 72701, Fayetteville, AR

    Rahul Basu, Edgar C. Clausen & James L. Gaddy

  2. Ridge National Laboratory, Oak Ridge, TN

    K. Thomas Klasson

Authors
  1. Rahul Basu
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  2. K. Thomas Klasson
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  3. Edgar C. Clausen
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  4. James L. Gaddy
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Basu, R., Klasson, K.T., Clausen, E.C. et al. Removal of carbonyl sulfide and hydrogen sulfide from synthesis gas byChlorobium thiosulfatophilum . Appl Biochem Biotechnol 45, 787–797 (1994). https://doi.org/10.1007/BF02941849

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  • DOI: https://doi.org/10.1007/BF02941849

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