Analysis of the Engineering Process of Reforming Dead Ccatalysts for the Extraction of Platinum Group Metals

N. M. Vostrikova, E. D. Kravtsova, Y. V. Vostrikova

Abstract


The analysis of the engineering process of reforming dead catalysts for the extraction of platinum group metals has been carried out. Fully-dead catalyst, having passed several cycles of regeneration and entitled to utilization, has the considerable carbonaceous deposits both on external and internal surface. Their content averages 5.0% of the mass of the catalyst.

The research objective consisted in selection of the sweet roasting modes promoting the fullest removal of the dense carbonaceous deposits from the surface of the dead platinum-rhenium catalysts.

 The kinetics research of carbonaceous removal deposits from the surface of the catalyst was carried out in a pipe-still heater; oxygen content, duration and temperature of sweet roasting being varied. The maximum temperature during the research reached 950°C, the maximum duration of isothermical holding didn't exceed 6 hours. The extent of carbonaceous deposits removal was calculated by changing sample weight.

The kinetic curves were approximated by high-order polynomials, which made it possible to obtain a diagram illustrating the degree of organic deposits removal depending on the temperature and firing time.

It is shown that in the environment enriched to 30-35 vol. % oxygen, the engineering process of catalysts for regeneration is possible to be carried out at 650 °C, with holding for 2 hours at the specified temperature. The alternative of sweet roasting is the air blowing of dead catalysts at temperature of 800 °C within one hour. Both modes guarantee the complete removal of the dense carbonaceous deposits from the surface of the dead catalyst.

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References


Bely A.S. Current status, development prospects of the process and reforming catalysts for gasoline petroleum fractions [Sovremennoe sostoyanie, perspektivy razvitiya protsessa i katalizatorov riforminga benzinovykh fraktsiy nefti], Kataliz v promyshlennosti [Catalysis in industry], 2014, no. 5, pp. 23-28. (in Russ.)

Akhmetov S.A., Serikov T.P., Kuzeev I.R., Bayazitov M.I. Tekhnologiya i oborudovanie protsessov pererabotki nefti i gaza [Technology and equipment of oil and gas refining processes], St. Petersburg, Subsoil, 2006, 868 p.(in Russ.)

Kuznetsov P.N., Kazbanova A.V., Kuznetsova L.I. et al. Investigation of Physicochemical Properties of Partially Spent Platinum-Rhenium Reforming Catalyst [Issledovanie fiziko-khimicheskikh svoystv chastichno otrabotannogo platinorenievogo katalizatora riforminga], Zhurnal Sibirskogo federal'nogo universiteta. Seriya: Tekhnika i tekhnologii [Journal of the Siberian Federal University. Series: Technics and Technologies], 2014, vol.7, no. 8, pp. 919-928. (in Russ.)

Kuznetsov P.N., Tverdokhlebov V.P., Kuznetsova L.I. et al. Physicochemical properties of the spent platinum-rhenium reforming catalyst at the Achinsk Oil Refinery [Fiziko-khimicheskie svoystva otrabotannogo platinorenievogo katalizatora riforminga na Achinskom NPZ], Neftekhimiya [Petrochemistry], 2013, vol. 53, no. 6, pp. 436-441. (in Russ.)

Gaydamaka S.N., Timofeev V.V., Lemenovsky D.A. et al. The possibility of supercritical fluid regeneration for Pt-Re/γ-Al2O3 industrial reforming catalyst in O3/CO2 mixtures, Catalysis in Industry, 2013, vol. 5, no. 3, pp. 216-222. DOI: 10.1134/s2070050413030033

Kenzhaliev B.K., Khodareva T.A. et al. Extraction of Pt and Pd from spent catalysts by the electrochemical method [Izvlechenie Pt i Pd iz otrabotannykh katalizatorov elektrokhimicheskim metodom], European Researcher, 2014, vol. (70), no. 3-1, pp. 442-449. (in Russ.)

Zorina C.V. New technology for reactivation of diesel hydrotreating catalysts [Novaya tekhnologiya reaktivatsii katali-zatorov gidroochistki dizel'nogo topliva], Onlayn-zhurnal "Sibirskaya neft'" [Siberian Oil Online Journal], 2016, no. 9/136, pp. 50-53. Available at: http://www.gazprom-neft.ru/press-center/sibneft-online/archive/2016-november/1115350/ (in Russ.)

Masagutov R.M., Morozov B.F., Kutepov B.I. Regeneratsiya katalizatorov v nefte-pererabotke i neftekhimii: monografiya [Catalyst regeneration in oil refining and petrochemicals: monograph], Moscow, Chemistry, 1987, 141 p. (in Russ.)

Khan M.A., Al-Jalal A.A. Enhanced decoking of a coked zeolite c atalyst using a glow discharge in Ar–O2 gas mixture, Applied Catalysis A General, 2004, vol. 272, pp. 141-149. DOI: 10.1016/j.apcata.2004.05.027

Guryev Y.V., Ivanova I.I., Lunin V.V. et al. Characterization of metal segregation in Pt–Re/Al2O3 reforming catalysts, Appl. Catal. A-Gen, 2007, vol. 329, pp. 16-21. DOI: 10.1016/j.apcata.2007.06.015

Pieck C.L., Vera C.R., Querini C.A., Parera J.M. Differences in coke burning-off from Pt-Sn/Al2O3 catalyst with oxygen or ozone, Applied Catalysis A General, 2005, vol. 278, pp. 173-180. DOI: 10.1016/j.apcata.2004.05.001

Gumerov F.M., Sabirzyanov A.N., Gumerova G.I. Sub- i sverkhkriticheskie flyuidy v protsessakh pererabotki polimerov [Sub- and supercritical fluids in polymer processing processes], Ed. FEN, 2000, 328 p. (in Russ.)

Sagdeev A.A., Kayumov R.A., Gallyamov R.F. et al. Ustanovka dlya issledovaniya ekstraktsionnykh protsessov s ispol'zovaniem rastvoriteley v sverkhkriticheskom sostoyanii [Installation for the study of extraction processes using solvents in a supercritical state], Russian Patent No. 133012. 2013. Bull. No. 28. (in Russ.)

Grigoriev M.V., Kulkov S.N. Phase Composition, Structure and Specific Surface of Powder Systems Based on Corundum of Different Dispersity [Fazovyy sostav, struktura i udel'naya poverkhnost' poroshkovykh sistem na osnove korunda razlichnoy dispersnosti], Zhurnal Sibirskogo federal'nogo universiteta: Tekhnika i tekhnologii [Journal of the Siberian Federal University: Engineering and Technology], 2009, no. 3, pp. 294-300. (in Russ.)




DOI: http://dx.doi.org/10.24892/RIJIE/20190406

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