Hydrogen production reformation

Keywords hydrogen production, reformer, efficiency, process simulation, reactor... 

Synthesis gas production for ammonia, methanol, oxo-alcohol, and hydrogen production reformer catalyst tubes up to 1000 °C oxidation/carburization... 

Fig. 1. Hydrogen production flow sheet, showing steam reforming, shift, hot potassium carbonate CO2 removal, and methanation.

Reforming Conditions. The main process variables are pressure, 450—3550 kPa (50—500 psig), temperature (470—530°C), space velocity, and the catalyst employed. An excess of hydrogen (2—8 moles per mole of feed) is usually employed. Depending on feed and processing conditions, net hydrogen production is usually in the range of 140—210 m /m feed (800—1200 SCF/bbl). The C —products are recovered and normally used as fuels. 

The steam reforming of natural gas process is the most economic near-term process among the conventional processes. On the other hand, the steam reforming natural gas process consists of reacting methane with steam to produce CO and H2. The CO is further reacted or shifted with steam to form additional hydrogen and CO2. The CO2 is then removed from the gas mixture to produce a clean stream of hydrogen. Normally the CO2 is vented into the atmosphere. For decarbonization, the CO2 must be sequestered[l,2]. The alternative method for hydrogen production with sequestration of carbon is the thermal decomposition of methane. 

The catalytic combustor provides heat for the endothermic reforming reaction and the vaporization of liquid fuel. The endothermic reforming reaction is carried out in a parallel flow-type micro-channel of the reformer unit. It is well known that the methanol steam reforming reaction for hydrogen production over the Cu/ZnO/AbOs catalyst involves the following reactions [10]. Eq. (1) is the algebraic summation of Eqs. (2) and (3). 

Hydrogen production by methanol autothermal reforming with high conductivity honeycomb supports... 

Low energy pulsed (LEP) discharge is a simple hydrogen production process. This novel technique requires neither high temperature nor pressure die reaction takes place at room temperature and atmospheric pressure. We have successftilly reformed hydrocarbons using this LEP dischai e [1-6]. 

Reformers for hydrogen production, giving outlet temperatures of 800-900°C. 

FUEL REFORMING FOR HYDROGEN PRODUCTION SEPARATION PROCESS FOR FUEL REFORMING... 

Fuel reforming is popular way for hydrogen production for fuel cell use. Hydrocarbons are used for the fuel resource. Methane (CH4) steam reforming process consists of the following two gas phase reactions with various catalysts. 

Carbon Dioxide Separation for Fuel Reforming Carbon dioxide separation reforming in the above mentioned is one of useful methodologies for efficient hydrogen production [29]. Calcium oxide (CaO) carbonation can absorb CO2 from the reformed gas and fix it. 

Spath, P. and M. Mann, Life Cycle Assessment of Hydrogen Production via Natural Gas Steam Reforming, Technical Report, NREL, NREL/TP-570-27637,2000. 

Yasuda, I. et al., Development of membrane reformer for highly-efficient hydrogen production from natural gas, Proceeding of XV World Hydrogen Energy Conference, Yokohama, Japan, 2004. 

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