TY - JOUR
T1 - Kinetic study of the selective oxidation of butan-2-one to diacetyl over vanadium phosphorus oxide
AU - McCullagh, E.
AU - McMonagle, J. B.
AU - Hodnett, B. K.
PY - 1993/1/4
Y1 - 1993/1/4
N2 - The selective oxidation of butan-2-one to diacetyl has been studied in the temperature range 200-380°C over a vanadium phosphorus oxide catalyst. In addition to diacetyl the principal reaction products detected were acetic acid, acetaldehyde, methyl vinyl ketone, propionaldehyde and carbon dioxide. A kinetic analysis indicated that diacetyl formation proceeds through a Mars and van Krevelen type mechanism and that there were two sources of acetaldehyde formation; the first predominating at high oxygen partial pressures involved an enol intermediate and adsorbed molecular oxygen; the second, which predominated at low oxygen partial pressures involved lattice oxygen and a diol intermediate. It is also proposed that acetoin, CH3COCHOHCH3, is a common intermediate in the formation of diacetyl and methyl vinyl ketone. High selectivities to diacetyl can be achieved by operation in anaerobic conditions.
AB - The selective oxidation of butan-2-one to diacetyl has been studied in the temperature range 200-380°C over a vanadium phosphorus oxide catalyst. In addition to diacetyl the principal reaction products detected were acetic acid, acetaldehyde, methyl vinyl ketone, propionaldehyde and carbon dioxide. A kinetic analysis indicated that diacetyl formation proceeds through a Mars and van Krevelen type mechanism and that there were two sources of acetaldehyde formation; the first predominating at high oxygen partial pressures involved an enol intermediate and adsorbed molecular oxygen; the second, which predominated at low oxygen partial pressures involved lattice oxygen and a diol intermediate. It is also proposed that acetoin, CH3COCHOHCH3, is a common intermediate in the formation of diacetyl and methyl vinyl ketone. High selectivities to diacetyl can be achieved by operation in anaerobic conditions.
KW - butanone selective oxidation
KW - kinetics
KW - selectivity (diacetyl)
KW - vanadium-phosphorus oxide.
UR - http://www.scopus.com/inward/record.url?scp=0027908212&partnerID=8YFLogxK
U2 - 10.1016/0926-860X(93)85194-T
DO - 10.1016/0926-860X(93)85194-T
M3 - Article
AN - SCOPUS:0027908212
SN - 0926-860X
VL - 93
SP - 203
EP - 217
JO - Applied Catalysis A, General
JF - Applied Catalysis A, General
IS - 2
ER -