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Transient kinetics of n ‐butane partial oxidation at elevated pressure
Author(s) -
Shekari Ali,
Patience Gregory S.
Publication year - 2013
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.21637
Subject(s) - maleic anhydride , butane , catalysis , partial oxidation , partial pressure , chemistry , yield (engineering) , redox , chemical reaction engineering , oxygen , selectivity , inorganic chemistry , materials science , organic chemistry , polymer , metallurgy , copolymer
A transient Mars‐van Krevelen type kinetic model was developed for n ‐butane partial oxidation over vanadyl pyrophosphate (VPP) catalyst. The model validity was verified over a relatively wide range of redox feed compositions as well as higher reactor pressure (410 kPa). Oxygen and n ‐butane conversion increased with higher pressure while maleic anhydride (MA) selectivity decreased by as much as 20%. However, the overall MA yield was enhanced by up to 30%. High pressure maintains the catalyst in a higher oxidation state (as long as there is sufficient oxygen in the gas phase) and as a consequence, the catalytic activity is improved together with MA yield. High pressure also affects the redox reaction rates and activation energies. © 2012 Canadian Society for Chemical Engineering