The transformation of n-alkanes on H-forms of zeolites under supercritical conditions

The transformation of n-alkanes on H-forms of zeolites under supercritical conditions Full article

Journal

Russian Journal of Physical Chemistry B
ISSN: 1990-7923 , E-ISSN: 1990-7931

Output data

Year: 2010, Volume: 4, Number: 7, Pages: 1085-1091 Pages count : 7 DOI: 10.1134/s1990793110070067

Authors

Bogdan V.I. ¹ , Koklin A.E. ¹ , Pokusaeva Ya.A. ¹ , Kazansky V.B. ¹

Affiliations

1	Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, Leninskii pr. 47, Moscow, 119991, Russia

The skeleton isomerization of n-butane, n-hexane, and n-heptane was studied under supercritical conditions on H-forms of zeolites mordenite, beta, and ZSM-5 over the temperature and pressure ranges 260–450°C and 80–130 atm. The isomerization of n-hexane and n-heptane was accompanied by side processes such as oligomerization and cracking. The selectivity of formation of branched isomers of these hydrocarbons did not exceed 70 and 30%, respectively. The catalyst with the most stable operation was pentasil ZSM-5, but the selectivity of formation of branched isomers on it did not exceed 30% even at 260–280°C and decreased to 3% as the reaction temperature increased to 400–450°C. The fraction of aromatization products was then more than 15%. A study of the influence of C6–C7 n-alkane additives on the isomerization of n-pentane on mordenite in the H-form under supercritical conditions at 260°C and 120 atm showed that a gradual decrease in the activity of this catalyst in the isomerization of n-pentane was related to the formation of heavier hydrocarbons.

Bogdan V.I. , Koklin A.E. , Pokusaeva Y.A. , Kazansky V.B.
The transformation of n-alkanes on H-forms of zeolites under supercritical conditions
Russian Journal of Physical Chemistry B. 2010. V.4. N7. P.1085-1091. DOI: 10.1134/s1990793110070067 WOS Scopus OpenAlex

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