International Journal of Microbiology / 2011 / Article / Tab 1

Research Article

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

Table 1

Observed partial pressures and the calculated Gibbs free energy change of CO conversion by C. hydrogenoformans in batch culture.

Culture 𝑑 (h)H2 (Pa)CO (Pa)CO2 (Pa)Acetate (mM) Ξ” 𝐺 R 1 (a) Ξ” 𝐺 R 2 (a)

βˆ’CO2 trap0.5 6 . 0 β‹… 1 0 2 2 . 4 β‹… 1 0 5 1 . 1 β‹… 1 0 3 0.2 (b)βˆ’53βˆ’52
9.5 2 . 0 β‹… 1 0 5 1 . 8 β‹… 1 0 4 1 . 3 β‹… 1 0 5 βˆ’16
55 2 . 0 β‹… 1 0 5 3 . 9 β‹… 1 0 1 1 . 3 β‹… 1 0 5 3.8+1βˆ’18

+CO2 trap0.5 2 . 2 β‹… 1 0 2 2 . 6 β‹… 1 0 5 8 . 4 β‹… 1 0 2 0.2βˆ’57βˆ’52
12.5 2 . 0 β‹… 1 0 5 1 . 4 β‹… 1 0 4 1 . 2 β‹… 1 0 4 βˆ’22
55 2 . 1 β‹… 1 0 5 0 . 4 β‹… 1 0 0 3 . 5 β‹… 1 0 2 0.2βˆ’3βˆ’16

(a) Ξ” 𝐺 R 1 and Ξ” 𝐺 R 2 : Gibbs free energy change (kJ/mol CO) for reaction (1) and reaction (2), respectively, at 70Β°C [10].
(b)Underlined: detection limits that were used in calculation of free energy.

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