Deep Conversion of Carbon Monoxide to Hydrogen and Formation of Acetate by the Anaerobic Thermophile Carboxydothermus hydrogenoformans

A.M. Henstra, A.J.M. Stams

Research output: Contribution to journalArticleAcademicpeer-review

15 Citations (Scopus)

Abstract

Carboxydothermus hydrogenoformans is a thermophilic strictly anaerobic bacterium that catalyses the water gas shift reaction, the conversion of carbon monoxide with water to molecular hydrogen and carbon dioxide. The thermodynamically favorable growth temperature, compared to existing industrial catalytic processes, makes this organism an interesting alternative for production of cheap hydrogen gas suitable to fuel CO-sensitive fuel cells in a future hydrogen economy, provided sufficiently low levels of CO are reached. Here we study CO conversion and final CO levels in cultures of C. hydrogenoformans grown in batch cultures that were started with a 100% CO gas phase with and without removal of formed CO(2). Final CO levels were 117¿ppm without CO(2) removal and below 2¿ppm with CO(2) removal. The Gibbs free energy change calculated with measured end concentrations and the detection of acetate suggest that C. hydrogenoformans shifted from a hydrogenogenic to an acetogenic metabolism
Original languageEnglish
Article number641582
Number of pages4
JournalInternational Journal of Microbiology
Volume2011
DOIs
Publication statusPublished - 2011

Fingerprint Dive into the research topics of 'Deep Conversion of Carbon Monoxide to Hydrogen and Formation of Acetate by the Anaerobic Thermophile Carboxydothermus hydrogenoformans'. Together they form a unique fingerprint.

  • Cite this