Hydrogen production for fuel cells via steam reforming of dimethyl ether over commercial Cu/ZnO/Al2O3 and zeolite

2012 ◽  
Vol 187 ◽  
pp. 299-305 ◽  
Author(s):  
Jing Li ◽  
Qi-Jian Zhang ◽  
Xu Long ◽  
Ping Qi ◽  
Zhao-Tie Liu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Hydrogen Production ◽  
Dimethyl Ether ◽  
Steam Reforming

scholarly journals Influence of solid–acid catalysts on steam reforming and hydrolysis of dimethyl ether for hydrogen production

2006 ◽  
Vol 304 ◽  
pp. 40-48 ◽  
Author(s):  
Kajornsak Faungnawakij ◽  
Yohei Tanaka ◽  
Naohiro Shimoda ◽  
Tetsuya Fukunaga ◽  
Shunichiro Kawashima ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Dimethyl Ether ◽  
Steam Reforming ◽  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Hydrolysis Of

Simulation of Hydrogen Production From Biomass Pyrolysis Gas by Secondary Steam Reforming

2008 ◽  
Author(s):  
Leteng Lin ◽  
Li Sun ◽  
Xiaodong Zhang ◽  
Xiaolu Yi ◽  
Min Xu
Keyword(s):  
Fuel Cells ◽  
Hydrogen Production ◽  
Gas Turbine ◽  
Steam Reforming ◽  
Water Gas Shift ◽  
Hydrogen Yield ◽  
Biomass Pyrolysis ◽  
Pyrolysis Gas ◽  
Secondary Steam ◽  
Water Gas

Hydrogen is currently being widely regarded as a futural energy carrier to reduce carbon emissions and other NOx and SOx pollutants. Many researchers have proved that hydrogen can be efficiently used in solid oxide fuel cells -gas turbine system (SOFC-GT) and molten carbonate fuel cells-gas turbine system (MCFC-GT). Hydrogen production from biomass resources offers the advantage of providing a renewable energy carrier for extensive reduction of the CO2 emission. A secondary steam reforming process which consists of steam reforming of methane and water gas shift was proposed to further convert CH4, CO and other hydrocarbons in biomass pyrolysis gas for promoting hydrogen yield. According to respective reaction mechanism, simulating calculations were carried out in two reforming processes separately. With the favor of PRO/II, the effects of reaction temperature and steam to carbon ratio on hydrogen yield were discussed in details in the steam reforming of methane. A reasonable calculation method was established for simulating the water gas shift process in which the effects of temperature and steam to CO ratio was investigated. The simulation made good results in optimizing reaction conditions for two reformers and predicting the volume rate of all gas components. It is proved by simulation that hydrogen-rich gas with >68 mol% H2 could be produced, and the hydrogen yield could reach 48.18 mol H2/(Kg Biomass) and 45.85 mol/(Kg Biomass) respectively when using corn straw and rice husk as feedstock. The experiment data from a related reference was adopted to prove the reasonability of the simulation results which could show the feasibility of secondary steam reforming process, as well as provide good references for practical process operation.

scholarly journals Methanol as a High Purity Hydrogen Source for Fuel Cells: A Brief Review of Catalysts and Rate Expressions

2017 ◽  
Vol 38 (1) ◽  
pp. 147-162 ◽  
Author(s):  
Maria Madej-Lachowska ◽  
Maria Kulawska ◽  
Jerzy Słoczyński
Keyword(s):  
Carbon Monoxide ◽  
Fuel Cells ◽  
Hydrogen Production ◽  
Steam Reforming ◽  
Kinetic Equations ◽  
Environmental Benefits ◽  
Production Methods ◽  
Steam Reforming Of Methanol ◽  
Fuel Source ◽  
Oxidation Of Carbon Monoxide

Abstract Hydrogen is the fuel of the future, therefore many hydrogen production methods are developed. At present, fuel cells are of great interest due to their energy efficiency and environmental benefits. A brief review of effective formation methods of hydrogen was conducted. It seems that hydrogen from steam reforming of methanol process is the best fuel source to be applied in fuel cells. In this process Cu-based complex catalysts proved to be the best. In presented work kinetic equations from available literature and catalysts are reported. However, hydrogen produced even in the presence of the most selective catalysts in this process is not pure enough for fuel cells and should be purified from CO. Currently, catalysts for hydrogen production are not sufficiently active in oxidation of carbon monoxide. A simple and effective method to lower CO level and obtain clean H2 is the preferential oxidation of monoxide carbon (CO-PROX). Over new CO-PROX catalysts the level of carbon monoxide can be lowered to a sufficient level of 10 ppm.

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