Optimisation of syngas production from a novel two-step chemical looping reforming process using Fe-dolomite as oxygen carriers
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Chemical-Looping Combustion
Partial oxidation
The main technologies for reforming natural gas to syngas at present are summarized including methane steam reforming,methane partial oxidation,carbon dioxide reforming of methane,coupling reaction of methane steam reforming and partial oxidation,coupling reaction of methane partial oxidation and carbon dioxide reforming,coupling reaction of methane steam reforming and carbon dioxide reforming,and tri-reforming of methane. The catalysts used in the first three typical reactions are focused on. It is pointed out that coupling the three typical reactions,and accompanied with lattice oxygen technology,plasma technology and microwave irradiation technology are development tendency of natural gas reforming to syngas.
Carbon dioxide reforming
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Chemical-looping steam reforming (CLSR) is a chemical-looping combustion (CLC) derived technology in which air is replaced by steam as oxidant. CLSR combines the inherent CO2 capture of CLC with the production of PEMFC-ready hydrogen streams without further purification steps. CLSR thus results in strong process intensification in hydrogen production. Here, we present results from a proof-of-concept study of CLSR of synthesis gas which combines thermodynamic screening for carrier selection, with synthesis and reactive test of highly active and high-temperature stable nanostructured oxygen carriers, and a reactor modeling study in order to demonstrate the feasibility of CLSR in a periodically operated fixed-bed reactor.
Chemical-Looping Combustion
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Partial oxidation
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Partial oxidation
Chemical-Looping Combustion
Partial pressure
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One of the most attractive routes for the production of hydrogen or syngas for use in fuel cell applications is the reforming and partial oxidation of hydrocarbons. The use of hydrocarbons in high temperature fuel cells is achieved through either external or internal reforming. Reforming and partial oxidation catalysis to convert hydrocarbons to hydrogen rich syngas plays an important role in fuel processing technology. The current research in the area of reforming and partial oxidation of methane, methanol and ethanol includes catalysts for reforming and oxidation, methods of catalyst synthesis, and the effective utilization of fuel for both external and internal reforming processes. In this paper the recent progress in these areas of research is reviewed along with the reforming of liquid hydrocarbons, from this an overview of the current best performing catalysts for the reforming and partial oxidizing of hydrocarbons for hydrogen production is summarized.
Partial oxidation
Methane reformer
Catalytic reforming
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Hydrogen production by partial oxidation steam reforming of methanol over a Cu/ZnO/Al2 O3 cata lyst has been paid more and more attention. The chemical equilibria involved in the methanol partial oxidation steam reforming reaction network such as methanol partial oxidation, methanol steam reforming, decomposition of methanol and water-gas shift reaction have been examined over the ranges of temperature 473-1073 K under normal pressure. Based on the detailed kinetics of these reactions over a Cu/ZnO/Al2O3 catalyst, and from the basic concept of the effectiveness factor, the intraparticle diffusion limitations were taken into account. The effec tiveness factors for each reaction along the bed length were calculated. Then important results were offered for the simulation of this reaction process.
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Carbon dioxide reforming
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Catalytic reforming
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Hydrogen production by partial oxidation steam reforming of methanol over a Cu/ZnO/Al2O3 catalyst has been paid more and more attention. The chemical equilibria involved in the methanol partial oxidation steam reforming reaction network such as methanol partial oxidation, methanol steam reforming, decomposition of methanol and water-gas shift reaction have been examined over the ranges of temperature 473-1073 K under normal pressure. Based on the detailed kinetics of these reactions over a Cu/ZnO/Al2O3 catalyst, and from the basic concept of the effectiveness factor, the intraparticle diffusion limitations were taken into account. The effectiveness factors for each reaction along the bed length were calculated. Then important results were offered for the simulation of this reaction process.
Partial oxidation
Partial pressure
Methane reformer
Water-gas shift reaction
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Partial oxidation
Carbon dioxide reforming
Methane reformer
Catalytic reforming
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