Transformations of tetradecane on La/Al2O3 + ZSM catalysts

Gaukhar D. Zakumbaeva, L. B. Shapovalova, B. T. Tuktin, Aizhan Omarova

2010

Closed access Metadata (CSL-JSON)
DOI 10.1134/s096554411002009x
Data confidence 70 medium
How this score is calculated

It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.

Abstract

The behavior of La/Al 2 O 3 + ZSM catalysts has been studied in the process of the hydrogen-free conversion of tetradecane. The structure and state of active centers of catalysts have been investigated using a combination of physicochemical and instrumental methods (TPD of ammonia, IR spectroscopy, electron microscopy). It was found that the catalysts are characterized by the presence of acid (Brönsted and Lewis) sites and M 0 and M n + metal centers. Lanthanum in different oxidation states can be included in the acid sites. The degree of tetradecane conversion and the product composition are determined by the SiO 2 /Al 2 O 3 ratio of the zeolite and the conditions of the process. The mechanism of the cracking and transformations of tetradecane on La/Al 2 O 3 + ZSM catalysts is discussed.