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Kinetics of desorption of normal paraffinic hydrocarbons on CaA and MgA zeolites

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Summary

  1. 1.

    A kinetic study has been made of the thermal desorption of C5-C8 n-paraffins from CaA and MgA zeolites at temperatures from 250 to 400°C.

  2. 2.

    It has been established that a temperature of 370–400°C in the desorption zone is necessary for complete desorption of n-paraffins from these zeolites.

  3. 3.

    At temperatures of 370–400°C, the n-paraffins are 90% desorbed within 20 min; at temperatures above 400°C, partial decomposition of the paraffinic hydrocarbons is observed.

  4. 4.

    A decrease in the dynamic adsorption activity of CaA and MgA zeolites in the separation of n-paraffins has been observed during the operation of a continuous pilot-plant unit; it has been shown that the working activity of the CaA zeolite is 80% and that of the MgA zeolite 85% of the respective initial activities.

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Literature cited

  1. 1.

    Ya. V. Mirskii, M. N. Mitrofanov, and A. Z. Dorogochinskii, New Adsorbents — Molecular Sieves [in Russian], Checheno-Ingush. Knizh. Izd. Groznyi (1964), p. 81.

  2. 2.

    A. M. Kuliev, R. A. Bagirov, N. I. Nabiev, et al., in: Gas and Gas-Condensate Processing [in Russian], No. 4, Moscow (1973), p. 9.

  3. 3.

    A. M. Kuliev, R. A. Bagirov, N. I. Nabiev, et al.. Khim. Tekhnol. Topl. Masel, No. 7, 18 (1973).

  4. 4.

    N. I. Nabiev and R. A. Bagirov, “Application of Microbead CaA Zeolite in Industrial Adsorption Chromatography,” Tr. Azerb. Fil. VNIIGaz, No. 4, 139, Azerneshr, Baku (1973).

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    W. F. Frans, Oil Gas J.,57, No. 15, 116 (1959).

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    V. A. Sokolov, N. S. Torocheshnikov, and N. V. Kel'tsev, Molecular Sieves and Their Application [in Russian], Khimiya, Moscow (1964), p. 97.

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Additional information

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 9. pp. 17–20, September, 1975.

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Kuliev, A.M., Bagirov, R.A., Nabiev, N.I. et al. Kinetics of desorption of normal paraffinic hydrocarbons on CaA and MgA zeolites. Chem Technol Fuels Oils 11, 683–686 (1975). https://doi.org/10.1007/BF00730312

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Keywords

  • Zeolite
  • Hydrocarbon
  • Kinetic Study
  • Initial Activity
  • Thermal Desorption