Hydrogen from glucose

Hydrogenase purified from the bacterium Pyrococcus furiosus has been combined with the enzymes of the pentose phosphate cycle to produce hydrogen from glucose-6-phosphate and NADP (Woodward et al., 2000). Similar experiments have been made using hydrogenase from Thiocapsa ro-... 

Miyake, J., Mao, X.Y. and Kawamura, S. (1984). Photoproduction of hydrogen from glucose by a co-culture of a photosynthetic bacterium and Clostridium butyricum. J. Ferment. Technol. 62, 531-535. 

Figure 1. Production of Hydrogen from Glucose Using Pentose Phosphate Pathway Enzymes...

Figure 4. Production of Hydrogen from Glucose by Encapsulated Glucose Dehydrogenase, Hydrogenase, and NADP in Presence (+) or Absence of Glucose Transporter...

An example for a non-structure-sensitive reaction is provided by Davis et al. [102], who investigated the liquid-phase hydrogenation of glucose over carbon and silica based ruthenium catalysts with particle sizes between 1.1 and 2.4 run. Depending on catalyst loading which was between 0.56 wt.% and 5 wt.%, dispersion decreased from 91% to 43%. At the same time, TOFs varied only insignificantly in a range between 0.21 1/s and 0.32 1/s. 

Byrd, A.J., Pant, K.K., Gupta, R.B. 2007. Hydrogen production from glucose using Ru/Alj O, catalyst in supercritical water. Ind Eng Chem Res 46 3574-3579. 

Hao, X.H., Guo, L.J., Mao, X., Zhang, X.M., Chen, X.J. 2003. Hydrogen production from glucose used as a model compound of biomass gasified in supercritical water. Int J Hydrogen Energy 28 55-64. 

The flux through the cycle from oxygen uptake is calculated on the basis that one complete turn of the cycle requires 2 molecules of oxygen for the oxidation of the hydrogen atoms or electrons produced from glucose oxidation (i.e. 1/3 of total oxygen consumption). 

Sorbitol is produced by high-pressure catalytic hydrogenation of glucose derived from cornstarch. It can also be produced as a co-product with mannitol if invert sugar (50% glucose, 50% fructose) is used as raw material. 

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