Reaction kinetics of reduction and oxidation of metal oxides for hydrogen production

Go, Kang Seok; Son, Sung Real; Kim, Sang Done

doi:10.1016/j.ijhydene.2008.05.039

Cited by 167 publications

(92 citation statements)

References 36 publications

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“…The obtained activation energy is compared with those of other studies for CLMR as shown in Table 3. The activation energy over LaFeO 3 oxygen carrier has similar value of activation energy with CeO 2 and MnFe 2 O 4 , and is lower than that of CoWO 4 (Otsuka et al, 1999;Go et al, 2008;Castillo et al, 2013).…”

Section: Model Evaluationmentioning

confidence: 80%

Reduction kinetics of lanthanum ferrite perovskite for the production of synthesis gas by chemical-looping methane reforming

Dai

Cheng

et al. 2016

Chemical Engineering Science

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Section: Model Evaluationmentioning

confidence: 80%

Reduction kinetics of lanthanum ferrite perovskite for the production of synthesis gas by chemical-looping methane reforming

Dai

Cheng

et al. 2016

Chemical Engineering Science

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“…7, where is the conversion fraction of reactant in time t, k is the reaction rate constant, and f( ) or g( ) represent the reaction mechanism. The kinetic models generally used fall into three groups [33][34][35]:…”

Section: Kinetics Modellingmentioning

confidence: 99%

Nickel catalyst auto-reduction during steam reforming of bio-oil model compound acetic acid

Cheng

Dupont

2013

International Journal of Hydrogen Energy

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Transition metal catalysts widely used in refineries are provided as oxides and require pre-reduction to become activated. The auto-reduction of a NiO/Al 2 O 3 catalyst with acetic acid (HAc) followed by HAc steam reforming was investigated in a packed bed reactor. Effects of temperature and molar steam to carbon ratio (S/C) on reduction kinetics and catalyst performance were analysed. Results showed that a steady steam reforming regime along with complete NiO reduction could be obtained after a coexistence stage of reduction and reforming. A 2D nucleation and nuclei growth model fitted the NiO auto-reduction. The maximum reduction rate constant was attained at S/C=2. Steam reforming activity of the auto-reduced catalyst was just below that of the H 2 -reduced catalyst, probably attributed to denser carbon filament formation and larger loss of active Ni. Despite this, a H 2 yield of 76.4% of the equilibrium value and HAc conversion of 88.97% were achieved at 750 °C and S/C=3.

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“…Jander model is a complex of one dimensional diffusion model (D1) and three dimensional phase-boundary reaction model (R3), it is always used to present the gas-solid noncatalytic reaction for ultrafine particle. For example, Kang et al has used this model to describe the reduction reaction of micro powder Fe 2 O 3 , MnFe 2 O 4 and ZnFe 2 O 4 with hydrogen and the following oxidation reaction of reduced product with water vapor [10].…”

Section: Kinetics Parameters Fittingmentioning

confidence: 99%

Study on the Kinetics of Water Decomposition by ZrMnFe Micro Powder

Yao¹,

Huang²,

Song³

2015

Proceedings of the 2015 International Conference on Sustainable Energy and Environmental Engineering

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Abstract-Aimed to recovery tritium from tritiated water, ZrMnFe micro powder synthesized by solvent combustion and calcium reduction was selected to decompose water vapor. The kinetics of reaction between ZrMnFe micro powder and water vapor was studied by isothermal thermogravimetric method in the temperature range 673K ～ 773K and water vapor range 2500×10 -6 ～ 10000×10-6. The result shows that the effective elements in ZrMnFe are Zr and Mn with the corresponding products ZrO 2 and MnO. The reaction rate increased with the rising of temperature and water concentration. The reaction process fitting with non-catalytic gas-solid reaction models shows that Jander model can accurately describe the reaction process, and the reaction is one order for water vapor with the activation energy 47KJ/mol.

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Reaction kinetics of reduction and oxidation of metal oxides for hydrogen production

Cited by 167 publications

References 36 publications

Reduction kinetics of lanthanum ferrite perovskite for the production of synthesis gas by chemical-looping methane reforming

Reduction kinetics of lanthanum ferrite perovskite for the production of synthesis gas by chemical-looping methane reforming

Nickel catalyst auto-reduction during steam reforming of bio-oil model compound acetic acid

Study on the Kinetics of Water Decomposition by ZrMnFe Micro Powder

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