Effect of acid-base properties of additives to the cracking catalyst on the sulfur content in liquid products

Influence of the properties of additives to the cracking catalyst on reducing of sulfur concentration in cracking liquid products was investigated. How acid-base properties of additives to cracking catalyst affect on the feed sulfur redistribution between gaseous and liquid products (including gasoline fraction with boiling point temperature 200 °C) was shown. Results show unlike previously adopted by many opinions about the approach to preparing such additives, as well as what should be considered not only the influence of acid-base properties of additives, but the reaction of aromatization promoting the formation of hydrogenated derivatives of thiophene, unstable conditions in catalytic cracking. Shown that increasing the acidity of additives was studied by ammonia TPD, contributes to a lower residual sulfur content in liquid products of cracking. Increasing of intensity and concentration of the base centers does not reduce the sulfur concentration. The presence of both acidic and base centers in the structure of the mixed Mg-Al oxides with spinel structure, achieves more clean gasoline from sulfur than only in the presence of acid centers. As an addition to the cracking catalyst «LUX» (OAO «GazpromNeft-Omsk Refinery») used oxides of some metals (Zn, Zr, Cr, Ce, Cu, Ca, Mg, Al) with different acid-base properties. The data obtained allow to proceed to the development of new catalysts for cracking (or additions to existing ones) that promote production of motor fuels (gasoline) to meet more stringent requirements on sulfur content. The obtained data allows to develop a new catalysts for cracking (or additions to existing ones) that promote production of motor fuels (gasoline) to meet more stringent requirements on sulfur content.

1. Мхитарова А., Старовойтова Н.Р., Хаимова Т.Г. Современное состояние и новейшие достижения процессов ККФ. М.:ЦНИИТЭНефтехим, 2002.

2. Шорей С.У., Ломас Д.А., Кисом У.Г. // Нефтегазовые технологии. 2000. № 2. С. 93.

3. Радченко Е.Д., Нефёдов Б.К., Алиев Р.Р. Промышленные катализаторы гидрогенизационных процессов нефтепереработки. М.: Химия, 1987.

4. Stratiev D., Tzingov T. et al. // Oil & Gas Journal 2008. Vol. 106. № 14. P. 54.

5. Genco F., Lo Verso G. et al. // Oil & Gas Journal 2001, Vol. 99. № 7. P. 54.

6. Pat. № 5525210 (USА). / Wormsbecher et al, 1996.

7. Машкина А.В. Гетерогенный катализ в химии органических соединений серы. Новосибирск: Наука, 1977.

8. Anderson P.-O. F., Pirjanali M., Jaras S.G., Boutonnet-Kizling M. // Catalysis Today. 1999. Vol. 53. P. 565.

9. Myrstad T., Engan H., Seljestokken B., Rytter E. // Applied Catalysis A: General. 1999. Vol. 187. № 1–2. P. 207.

10. Shan H.H., Li C.Y., Yang C.H. et al. // Catalysis Today. 2002. Vol. 77. P. 117.

11. Can F., Travert A., Ruaux V. et al. // Journal of Catalysis 2007. Vol. 249. № 1. P. 79.

12. Climent M.J., Corma A., Iborra S. et al. // Journal of Catalysis. 2004. Vol. 225. P. 316.

13. Танабе К. Твердые кислоты и основания. М.: Мир, 1973.

14. Kissin Y. V. // Catalysis Reviews. 2001. Vol. 43. № 1–2. P. 85.

15. Acidic sites on catalyst surfaces and their determination // Catalysis Today. 1989. Vol. 5. № 1. P. 1.

16. Balarani A.D., Bocanegra S.A., Castro A.A. et al. // Catalysis Letters. 2009. Vol. 129. P. 293.

17. Ren Yan-Jin, Li Shi. // Catalysis Letters. 2008. Vol. 121. №.1–2. P. 85.