Optimization of Ni loading and operating conditions for carbon dioxide reforming of methane over NiO/CeO2 catalyst using response surface methodology

I Istadi, Nor Aishah Saidina Amin, Mohd Nizam Ahmad Sanusi

Abstract


Optimization of Ni loading and operating conditions for carbon dioxide reforming of methane over NiO/CeO2 catalyst using response surface methodology

Modelling and optimization of Carbon Dioxide Reforming of Methane (CORM) reaction over NiO/CeO2 catalyst were developed using Response Surface Methodology (RSM). Relationship between responses, i.e. CH, conversion, H2 and CO selectivities, and three independent variables, i.e. reactor temperature, CO2/CH4 ratio, and wt. % Ni in the CeO-supported catalyst, were presented as empirical mathematical models. The models showed a good fitting to the experimental data statistically. The NiO/CeO2 showed a potential catalyst for the CORM process, though some coking formations were found. The catalysts exhibited a promising catalytic performance with the unity H2/CO ratio in the product, high methane conversion, and low reverse water gas shift reaction. The reactor temperature, CO2/CH4 ratio, and wt. % Ni in the CeO2-supported catalyst being 840oC, 1, and 6.5%, respectively were suggested with respect to CH4 conversion, H2 and CO selectivity, and H2/CO ratio of 75.7%, 68.5%, 54.5%, and 1.03, respectively.

Keywords: Carbon dioxide reforming of methane, NiO/CeO, catalyst, Response Surface Methodology

 

Abstrak

Permodelan dan optimisasi reaksi pembentukan kembali metana dengan karbondioksida (CORM) melalui katalis NiO/CeO2 telah dikembangkan dengan menggunakan Response Surface Methodology (RSM). Hubungan antara respon-respon (konversi CH, selektifitas H2 and CO) dengan tiga peubah tak bergantung (temperatur reaktor; rasio CO2/CH4, dan % berat Ni dalam katalis berpenyangga CeO) dinyatakan dalam model matematika empiris. Model empiris tersebut secara statistik menunjukkan korelasi yang baik terhadap data-data eksperimen.  NiO/CeO2 tersebut menunjukkan sebuah katalis yang berpotensi untuk proses CORM. Katalis tersebut menunjukkan kinerja katalitik yang menjanjikan dengan rasio H2/CO mendekati satu dalam produk, konversi metana yang tinggi, dan reaksi reverse water gas shift yang rendah. Temperatur reactor 840oC, rasio CO2/CH4, 1, dan 6.5 wt. % Ni adalah direkomendasikan dengan konversi CH4 75.7%, selektifitas H2 68.5%, selektifitas CO 54.5%, dan rasio H2/CO 1.03.

 

Kata Kunci: Pembentukan kembali metana dengan karbondioksida, Katalis NiO/CeO2, Response Surface Methodology


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References


Asami, K., Li, X., Fujimoto, K., Koyama, Y., Sakurama, A., Kometani, N. and Yonezawa, Y., (2003), "CO2 Reforming of CH4 over Ceria­supported Metal Catalysts", Catal. Today, 84, p. 27-31

Chen, Y.G., Tomishige, K., Yokoyama, K., Fujimoto, K., (1997), "Promoting Effect of Pt, Pd and Rh noble metals to the Nio 0 ,Mg 0 97 0 Solid Solution Catalysts for the Reforming of CH, with CO,", Appl. Catal.A, 165,p.335-347

Chen, Y.G., Tomishige, K., Yokoyama, K., Fujimoto, K., (1999), "Catalytic Performance and Catalyst Structure of Nickel-Magnesia Catalyst for CO, Reforming of Methane", J Catal., 184, p.479-490

Cornell, J.A., (1990), "How to Apply Response Surface Methodology", American Society for Quality Control, Wisconsin

Dong,W.S., Roh, H.S., Jun, K.W., Park, S.E., and Oh, Y.S., (2002), "Methane Reforming over Ni/Ce-Zr0 2 Catalysts: Effect of Nickel Content", Appl. Catal. A, 226, p. 63-72

Goguet, A., Meunier, F., Breen, J.P., Burch, R., Petch, M.I., and Ghenciu, A.F., (2004), "Study ofthe Origin of the Deactivation of a Pt/CeO, Catalyst During Reverse Water Gas Shift (RWGS) Reaction", J Catal., 226, p. 382-392

Hattori, T. and Kito, S., (1991), "Artificial Intelligence Approach to Catalyst Design", Cata/. Today, IO,p. 213-222

Hattori, T. and Kito, S., (1995), "Neural Network as a Tool for Catalyst Development", Catal. Today, 23, p. 347-355

Hou, Z.Y., Dai, Q.L., Wu, X.Q. and Chen, G.T., (1997), "Artificial Neural Network Aided Design of Catalyst for Propane Ammoxidation", Appl. Catal. A, 161, p. 183-190

Huang, K., Chen, F.Q. and Lu, D.W., (2001), "Artificial Neural Network-Aided Design of a Multi-Component Catalyst for Methane Oxidative Coupling", Appl. Catal. A, 219, p. 61-68

Istadi, and Amin, N.A.S., (2005a). "Optimization of Process Parameters and Catalyst Compositions in CO, Oxidative Coupling of Methane over CaO­MnO/CeO, Catalyst using Response Surface Methodology", Fuel Proc. Technol. In Press

Istadi, and Amin, N.A.S., (2005b), "A Hybrid Numerical Approach for Multi­ Responses Optimization of Process Parameters and Catalyst Compositions in CO, OCM Process over CaO-MnO/CeO, Catalyst", Chern. Eng. J., 106, p. 213-227

Montgomery, D.C., (2001), "Design and Analysis of Experiments", John Wiley & Sons, New York

Montoya, J.A., Romero-Pasqual, E., Gimon, C., Del Angel, P., and Monzon, A., (2000), "Methane Reforming with CO, over Ni/ZrO,-CeO, Catalysts Prepared by Sol-Gel", Catal. Today, 63, p. 71-85

Roh, H.S., Potdar, H.S., and Jun, K.W., (2004), "Carbon Dioxide Reforming of Methane over Co-Precipitated Ni-CeO,, Ni-ZrO, and Ni-Ce-ZrO, Catalysts", Catal. Today, 93-95, p. 39-44

StatSoft, Inc., (2001), "STATISTICA(data analysis software system)", Version 6, StatSoft, Inc, Tulsa, USA, http://www.statsoft.com

Wang, H.Y., and Ruckenstein, E., (2000), "Carbon Dioxide Reforming of Methane to Synthesis Gas over Supported Rhodium Catalysts: The Effect of Support", Appl. Cata/. A, 204, p. 143-152

Wang, J.B., Tai, Y.L., Dow, W.P., and Huang, T.J., (2001), "Study of Ceria­Supported Nickel Catalyst and Effect of Yttria Doping on Carbon Dioxide Reforming of Methane", Appl. Catal. A, 218, p. 69-79.

Wang, S., and Lu, G.Q., (1996), "Carbon Dioxide Reforming ofMethane to Produce Synthesis Gas over Metal-Supported Catalysts: State of the Art", Energy Fuels, I 0, p. 896-904

Wu, D., Li, Y., Shi, Y., Fang, Z., Wu, D. and Chang, L., (2002), "Effect of the Calcination Conditions on the Mechanical Properties of a PCoMo/Al 2 0 3 Hydrotreating Catalyst", Chern. Eng. Sci.. 57, p. 3495-3504

Zaman, J., (1999), "Oxidative Processes i': Natural Gas Conversion", Fuel Prcc. Technol., 58, p. 61-81




DOI: http://dx.doi.org/10.5614/jtki.2005.4.2.8

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