Catalytic activity evaluation for hydrogen production via autothermal reforming of methane

Souza, Aleksándros El Áurens Meira de; Maciel, Leonardo José Lins; Filho, Nelson Medeiros de Lima; Abreu, César Augusto Moraes de

doi:10.1016/j.cattod.2009.06.003

Cited by 22 publications

(12 citation statements)

References 28 publications

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“…The range for the inlet temperature was from 400 to 1000 °C, and for the pressure from 1 to 50 bar. This window of conditions was defined in consideration of previous experimental and theoretical works on methane ATR (Halabi et al, 2008;Chang et al, 2010;Akbari et al, 2011;Dias e Assaf, 2004;Santos et al, 2010;Chen et al, 2010;Li et al, 2008;Reese et al, 2010;Simeone et al, 2008;Ayabe et al, 2003;Escritori et al, 2009;Souza et al, 2010;Hoang et al, 2006;Dantas et al, 2010), except for the O/M ratio. A higher O/M ratio, in fact, implies a higher equilibrium temperature.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Analysis of Synthesis Gas Production From Autothermal Reforming of Methane

Souza¹,

Silva²,

Cardozo‐Filho³

2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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In this work a thermodynamic analysis of methane autothermal reforming (ATR) was performed to investigate syngas production using entropy maximization method. The main evaluated parameters were equilibrium compositions, including coke formation, syngas production, and equilibrium temperature.as a function of oxygen to methane mole ratio (O/M) and steam to methane ratio (S/M) at different inlet temperatures (IT) pressures (P).The nonlinear programming problem formulated was implemented in GAMS ® and solved using CONOPT2 solver. Suitable conditions for the production of syngas both methanol synthesis and Fischer-Tropsch synthesis are S/M between 0 and 0.5, O/M between 0.25 and 0.5, and all studied range of IT (400-1000 ºC) and P (1-50 bar). Under these conditions, coke formations can be thermodynamically inhibited.

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Section: Resultsmentioning

confidence: 99%

Thermodynamic Analysis of Synthesis Gas Production From Autothermal Reforming of Methane

Souza¹,

Silva²,

Cardozo‐Filho³

2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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Section: Resultsmentioning

confidence: 99%

Thermodynamic Analysis of Autothermal Reforming of Methane via Entropy Maximization: Hydrogen Production

Souza¹,

Rossi²,

Alonso³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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-In this work a thermodynamic analysis of the autothermal reforming (ATR) of methane was performed. Equilibrium calculations employing entropy maximization were performed in a wide range of oxygen to methane mole ratio (O/M), steam to methane ratio (S/M), inlet temperature (IT), and system pressure (P). The main calculated parameters were hydrogen yield, carbon monoxide formation, methane conversion, coke formation, and equilibrium temperature. Further, the optimum operating oxygen to methane feed ratio that maximizes hydrogen production, at P=1 bar, has been calculated. The nonlinear programming problem applied to the simultaneous chemical and phase equilibrium calculation was implemented in GAMS ® , using CONOPT2 solver. The maximum amount of hydrogen obtained was in the order of 3 moles of hydrogen per mole of fed methane at IT=1000 °C, P=1 bar, S/M=5, and O/M=0.18.

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“…The heat generated from partial oxidation is absorbed by steam reforming; hence, the overall temperature which is decreased with respect to partial oxidation is acceptable. In recent years, considerable attention has been paid to autothermal reforming which has an interesting potential in industrial applications [18][19][20][21][22] ; but, there have been only few works on reactor simulation and optimization. Behroozsarand et al 23 performed multi-objective optimization of an industrial autothermal reformer, which consisted of a noncatalytic partial oxidation chamber and a two-section catalytic steam reformer in order to produce syngas with H 2 /CO molar ratio of close to 1 for application in oxo-processes.…”

Section: Introductionmentioning

confidence: 99%

Simulating and Optimizing Hydrogen Production by Low-pressure Autothermal Reforming of Natural Gas using Non-dominated Sorting Genetic Algorithm-II

Azarhoosh

Ebrahim

Pourtarah

2016

Chem. Biochem. Eng. Q.

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Conventional hydrogen production plants consist of natural gas steam reforming to CO+3H 2 on Ni catalysts in a furnace, water-gas shift reaction for converting CO into CO 2 and CO 2 absorption. A new alternative method for highly endothermic steam reforming is autothermal reforming (steam reforming with air input to the reactor) without the need for external heating. In this study, hydrogen production by autothermal reforming for fuel cells (base case) was simulated based on a heterogeneous and one-dimensional model. In addition, the effect of operating variables on the system behavior was studied. Finally, Pareto-optimal solutions for the maximum molar flow rate of the produced hydrogen and methane conversion were determined by NSGA-II. There was a huge increase in the produced hydrogen molar flow to the base case, which showed the importance of optimizing autothermal reformers for hydrogen production.

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Catalytic activity evaluation for hydrogen production via autothermal reforming of methane

Cited by 22 publications

References 28 publications

Thermodynamic Analysis of Synthesis Gas Production From Autothermal Reforming of Methane

Thermodynamic Analysis of Synthesis Gas Production From Autothermal Reforming of Methane

Thermodynamic Analysis of Autothermal Reforming of Methane via Entropy Maximization: Hydrogen Production

Simulating and Optimizing Hydrogen Production by Low-pressure Autothermal Reforming of Natural Gas using Non-dominated Sorting Genetic Algorithm-II

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