Hydrogen Production Pathways

Sensitivity of Results of Cost Analysis for Hydrogen Production Pathways to Various Parameter Values, 50... 

For each hydrogen production pathway and for both states of technology development (current and possible future), the committee developed engineering-economic models to estimate the primary inputs of feedstocks, of electricity or other energy, and of capital equipment for each standard-sized plant and to estimate the resulting outputs of H2 and C02. Within the models, a distinction is made between pathways in which the C02 is sequestered and those in which it is released back into the atmosphere. Additional costs of C02 separation, capture, compression, transport, and sequestration are included for processes in which most of the C02 is sequestered. 

The sparsely populated Tables 6.2 and 6.3 should be regarded as indications of work to be done. A number of studies have identified environmental impacts for a range of hydrogen production pathways, ready for incorporation in life-cycle analyses (GM, 2001 Wang, 2002 Wurster, 2003 EC, 2004). 

NETL U.S. DOE. Central hydrogen production pathway. Funding Opportunity Announcement. DE-PS26-06NT42800, 2006. 

Figure 11.1 Hydrogen production pathway from glucose by fermentative microbes under anaerobic conditions. Dashed arrows indicate multiple enzymatic steps. PFOR, pymvate-ferredoxin oxidoreductase NFOR, NADH-ferredoxin oxidoreductase PFL, pyruvate formate lyase. Hydrogenases of different types are generally referred to as H2ase. ...

Wells, M.A., Mercer, J., Mott, R.A., Pereira-Medrano, A.G., Buija, A.M., Radianingtyas, H., Wright, P.C., 2011. Engineering a non-native hydrogen production pathway into Escherichia coli via a cyanobacterial [NiFe] hydrogenase. Metabolic Engineering 13, 445-453. 

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