TY - JOUR
T1 - Selective and high catalytic activity of CsnH4-nPMo11VO40 (n≥3) for oxidation of ethanol
AU - Lee, Dae Won
AU - Lee, Jin Hyuk
AU - Hyun, Jae Chun
AU - Lee, Kwan Young
N1 - Funding Information:
Financial support by the Grant-in-aid from Korea Science and Engineering Foundation (961-1108-048-2) is highly appreciated.
PY - 2000/3/13
Y1 - 2000/3/13
N2 - Oxidation of ethanol has been performed over CsnH4-nPMo11VO40 (0 ≤ n ≤ 4) catalysts in order to investigate the oxidation property of acidic Cs salts of molybdovanadophosphoric acid. A flow-type packed bed reactor was used for the reaction. Acetaldehyde was produced by oxidation catalysis, while ethylene and diethyl ether were produced by acid catalysis. The yields of these products were strongly dependent on the amount of Cs contained. Acid catalysis was dominant in n < 3, especially 2.5 < n < 3; this could be explained by high surface acidity caused by high surface area and uniformity. On the other hand, oxidation catalysis was remarkably improved for n ≥ 3. For these catalysts, acetaldehyde was produced selectively and the yield increased up to 38%, which was three times higher than that of n < 3. Several characteristics studies using XRD, ESCA, ICP, solid-state NMR, and CO2 adsorption have showed that the high oxidation activity for n ≥ 3 was attributable to the increased surface basicity caused by surface Cs species being not incorporated into the bulk structure.
AB - Oxidation of ethanol has been performed over CsnH4-nPMo11VO40 (0 ≤ n ≤ 4) catalysts in order to investigate the oxidation property of acidic Cs salts of molybdovanadophosphoric acid. A flow-type packed bed reactor was used for the reaction. Acetaldehyde was produced by oxidation catalysis, while ethylene and diethyl ether were produced by acid catalysis. The yields of these products were strongly dependent on the amount of Cs contained. Acid catalysis was dominant in n < 3, especially 2.5 < n < 3; this could be explained by high surface acidity caused by high surface area and uniformity. On the other hand, oxidation catalysis was remarkably improved for n ≥ 3. For these catalysts, acetaldehyde was produced selectively and the yield increased up to 38%, which was three times higher than that of n < 3. Several characteristics studies using XRD, ESCA, ICP, solid-state NMR, and CO2 adsorption have showed that the high oxidation activity for n ≥ 3 was attributable to the increased surface basicity caused by surface Cs species being not incorporated into the bulk structure.
UR - http://www.scopus.com/inward/record.url?scp=0033715539&partnerID=8YFLogxK
U2 - 10.1016/S0926-860X(99)00360-9
DO - 10.1016/S0926-860X(99)00360-9
M3 - Article
AN - SCOPUS:0033715539
SN - 0926-860X
VL - 194
SP - 123
EP - 127
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -