Abstract
The conversion of natural gas was carried out via tri-reforming of methane in a fixed bed reactor employing a Ni/γ-Al2O3 catalyst. The kinetic evaluations were performed in a temperature range from 923 to 1,123 K under atmospheric pressure. The effects due to water and oxygen addition to the feed of the process were examined in terms of the yields of hydrogen and carbon monoxide. Contributions of the reverse water–gas shift and oxidation reactions were evaluated. At temperatures above 1,000 K, methane and carbon dioxide conversions of 97.35 and 46.75% produced hydrogen and carbon monoxide with yields of 37.35 and 4.99%, respectively. A model was proposed to describe the kinetic behavior of the process considering the proposition of a four step reaction mechanism. The solutions of the equations of the model established predictions in terms of reactant and products concentration evolutions. The model predictions indicated that for operations at 1,123 K and 1.0 bar, with low spatial times (τ < 2.0 kg s/m3), a hydrogen yield as high as 75% was obtained.
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Van Berge JP, Van De Loosdrecht J, Barradas S (2002) WO Patent No 0 207 883
Souza MMVM, Schmal M (2005) Appl Catal A 281:19–24
Hong-Tao J, Hui-Quan L, Yi Z (2007) J Fuel Chem Technol 35(1):72–78
Sahli N, Petit C, Roger AC, Kiennemann A, Libs S, Bettahar MM (2006) Catal Today 113:187–193
Song C, Pan W (2004) Catal Today 98:463–484
Cho W, Song T, Mitsos A, McKinnon JT, Ko GH, Tolsma JE, Denholm D, Park T (2009) Catal Today 139(4):261–267
Yaw TC, Amin NAS (2007) Int J Hydrogen Energy 32:1789–1798
Weisz PB, Prater CD (1954) Adv Catal 6:143–196
Villermaux J (1982) Génie de la Réaction Chimique, Conception et Fonctionnement des Réacteurs. Technique et Documentation (Lavoisier), Paris, p. 394, 1982
Ho SC, Chou TC (1995) Ind Eng Chem Res 34:2279–2284
Maciel LJL, Souza AEAM, Vasconcelos SM, Knoechelmann A, Abreu CAM (2007) Stud Surf Sci Catal 167:469–474
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Maciel, L.J.L., de Souza, A.E.Á.M., Cavalcanti-Filho, V.O. et al. Kinetic evaluation of the tri-reforming process of methane for syngas production. Reac Kinet Mech Cat 101, 407–416 (2010). https://doi.org/10.1007/s11144-010-0232-9
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DOI: https://doi.org/10.1007/s11144-010-0232-9