Open AccessHigher propene yield by tailoring operating conditions of propane oxidative dehydrogenation over V2O5/γ-Al2O3
Author(s) -
Yousef Zaynali,
Seyed Mehdi Alavi
Publication year - 2015
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc140505067z
Subject(s) - propene , dehydrogenation , propane , catalysis , yield (engineering) , chemistry , oxygen , selectivity , partial pressure , inorganic chemistry , atmospheric pressure , materials science , organic chemistry , metallurgy , oceanography , geology
Supported vanadia catalyst was successfully synthesized using wet impregnation of γ-Alumina to study Propane Oxidative Dehydrogenation (POD). The prepared catalysts were characterized with XRD, BET, and TPR tests. In a broad temperature range (340 to 630°C), effects of vanadia loading (2.7, 5.4, and 9 wt%) and propane to oxygen ratio (3/1 to 1/3) were thoroughly investigated on propane conversion as well as propene yield at atmospheric pressure. Results indicate that by increasing the vanadia content the activity of catalyst increases while selectivity to propene decreases monotonically. As the temperature increases from 340°C to 630°C, yield to propene shows ascending behavior in case of all catalyst samples. Yield to propene shows a climax with changing propane to oxygen ratio from 3/1 to 1/3. The yield increases with increase in oxygen partial pressure of feed until equimolar ratio of propane and oxygen, then it declines with further increase of oxygen partial pressure. A maximum propene yield of 17% was experienced on catalyst with 2.7wt% vanadia at temperatures at 550°C