Predicting the amount of coke deposition on catalyst through image analysis and soft computing

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Zhang, Jingqiong ; Zhang, Wenbiao ; He, Yuting ; Yan, Yong (2016)

The amount of coke deposition on catalyst pellets is one of the most important indexes of catalytic property and service life. As a result, it is essential to measure this and analyze the active state of the catalysts during a continuous production process. This paper proposes a new method to predict the amount of coke deposition on catalyst pellets based on image analysis and soft computing. An image acquisition system consisting of a flatbed scanner and an opaque cover is used to obtain catalyst images. After imaging processing and feature extraction, twelve effective features are selected and two best feature sets are determined by the prediction tests. A neural network optimized by a particle swarm optimization algorithm is used to establish the prediction model of the coke amount based on various datasets. The root mean square error of the prediction values are all below 0.021 and the coefficient of determination R 2, for the model, are all above 78.71%. Therefore, a feasible, effective and precise method is demonstrated, which may be applied to realize the real-time measurement of coke deposition based on on-line sampling and fast image analysis.
  • References (27)
    27 references, page 1 of 3

    [1] Gross E, Liu J H C, Toste F D and Somorjai G A 2012 Control of selectivity in heterogeneous catalysis by tuning nanoparticle properties and reactor residence time Nature chemistry 4(11) 947-952

    [2] Ren X H, Bertmer M, Stapf S, Demco D E, Blümich B, Kern C and Jess A 2002 Deactivation and regeneration of a naphtha reforming catalyst Appl. Catal. A: General 228(1) 39-52

    [3] Aguayo A T, Sánchez del Campo A E, Gayubo A G, Tarrío A and Bilbao J 1999 Deactivation by coke of a catalyst based on a SAPO 34 in the transformation of methanol into olefins Journal of Chemical Technology and Biotechnology 74(4) 315-321

    [4] Wood J and Gladden L F 2002 Effect of coke deposition upon pore structure and self-diffusion in deactivated industrial hydroprocessing catalysts Appl. Catal. A: General 249(2) 241-253

    [5] Chen D, Rebo H P, Moljord K and Holmen A 1997 The role of coke deposition in the conversion of methanol to olefins over SAPO-34 Studies in Surface Science and Catalysis 111 159-166

    [6] Dejaifve P, Auroux A, Gravelle P C and Védrine J C 1982 Methanol conversion on acidic ZSM-5, offretite, and mordenite zeolites: A comparative study of the formation and stability of coke deposits Journal of Catalysis 70(1) 123-136

    [7] Bibby D M, Milestone N B, Patterson J E and Aldridge L P 1986 Coke formation in zeolite ZSM-5 Journal of Catalysis 97(2) 493-502

    [8] Sun Z, Gu X and Yu J 2001 Coking models of reactor in continuous catalytic reforming Journal of East China University of Science and Technology 27(5) 568-571

    [9] Bai Z W 2000 Determination of the components of mixture by thermogravimetric analysis Journal of Instrumental Analysis 19(4) 83-85

    [10] Li B H and Gonzalez R D 1998 The measurement of small amounts of coke by a sensitive TGA/FTIR technique Catalysis letters 54(1-2) 5-8

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