Propane Transformation on Zn-Modified Zeolite. Effect of the Nature of Zn Species on Alkane Aromatization and Hydrogenolysis

Sergei S. Arzumanov, Anton A. Gabrienko, Alexander V. Toktarev, Zoya N. Lashchinskaya, Dieter Freude, Jürgen Haase, Alexander G. Stepanov

Результат исследования: Научные публикации в периодических изданияхстатья

2 Цитирования (Scopus)

Аннотация

With regard to establishing the effect of the nature of Zn species loaded in a zeolite on the aromatization of propane, the transformation of 13C-labeled propane (propane-1-13C and propane-2-13C) has been monitored by 1H and 13C (CP) MAS NMR at 296-623 K for two zeolite samples, containing exclusively either isolated Zn2+ cations (Zn2+/H-BEA zeolite sample) or small (ZnO)n clusters of zinc oxide (ZnO/H-BEA zeolite sample). It has been established that similar intermediates, π-complex of propene and σ-allylzinc species, are formed at propane transformation to aromatics on both zeolite samples. However, the formation of the identified intermediates and their evolution to final aromatic products have been detected to occur on Zn2+/H-BEA at lower temperature (by 100 K) as compared to the same transformation on ZnO/H-BEA zeolite. Analysis of the kinetics of propane transformation by 1H MAS NMR in situ has shown similar regularities for propane aromatization and hydrogenolysis on the different zeolite samples, but the reactions on Zn2+/H-BEA occur 10 times faster than on ZnO/H-BEA. This allows us to conclude on a higher efficiency of Zn2+ cations compared to ZnO species for propane aromatization on Zn-modified zeolites.

Язык оригиналаанглийский
Страницы (с-по)30473-30485
Число страниц13
ЖурналJournal of Physical Chemistry C
Том123
Номер выпуска50
DOI
СостояниеОпубликовано - 19 дек 2019

Fingerprint Подробные сведения о темах исследования «Propane Transformation on Zn-Modified Zeolite. Effect of the Nature of Zn Species on Alkane Aromatization and Hydrogenolysis». Вместе они формируют уникальный семантический отпечаток (fingerprint).

  • Цитировать