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Physical Chemistry Research، جلد ۱۱، شماره ۴، صفحات ۷۶۱-۷۷۰
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عنوان انگلیسی Deactivation of Iron Fischer-Tropsch Catalyst in the Presence of Different Promoters: Model Determination and Parameter Estimation Using a Hybrid ANN/GPLE Technique
چکیده انگلیسی مقاله In this paper, the deactivation of the iron-based catalyst was assessed in the presence of Zr, Mn, and Cr promoters at two different loadings (5 and 10%). ANN/GPLE hybrid technique was applied for model determination and parameter estimation, as well as calculation of catalyst stability in the following conditions: temperature=280℃, H2/CO=2, and pressure=1.8 atm. The results showed that the promoter loading could change the deactivation behavior of the iron catalyst such that the first-order GPLE model well fitted the results at a promoter loading of 5%. For the case of 10% loading, the second-order GPLE model well fitted the results. A decline in the promoter loading on the iron catalysts enhanced the catalyst stability while decreasing its deactivation constant (kd). The promoter loadings of 5% and 10% indicated coking and sintering mechanisms, respectively. Among the different promoters at various loadings, Mn promoter at the loading of 5% could significantly prolong the catalyst life and enhance the stability of the iron catalyst. Zr increased the deactivation constant of Fe catalyst (kd) more than other promoters. ANN/GPLE technique is a promising method for the catalytic deactivation investigation, model determination, and parameter estimation.
کلیدواژه‌های انگلیسی مقاله Deactivation models,Iron catalyst,Stability,Artificial Neural Network,GPLE,Promoter
نویسندگان مقاله Maliheh Ghofran Pakdel |
Department of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, P. O. Box: 98164-161, Zahedan, Iran

Seyyed Hossein Zohdi |
Department of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, P. O. Box: 98164-161, Zahedan, Iran

Ali Akbar Mirzaei |
Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, P. O. Box: 98135-674, Zahedan, Iran

نشانی اینترنتی https://www.physchemres.org/article_162120_780af9c32c04ff8394830aeb24822e78.pdf
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