TY - JOUR
T1 - Conversion of γ-Valerolactone to Ethyl Valerate over Metal Promoted Ni/ZSM-5 Catalysts: Influence of Ni0/Ni2+ Heterojunctions on Activity and Product Selectivity
AU - Velisoju, Vijay Kumar
AU - Jampaiah, Deshetti
AU - Gutta, Naresh
AU - Bentrup, Ursula
AU - Brückner, Angelika
AU - Bhargava, Suresh K.
AU - Akula, Venugopal
N1 - Generated from Scopus record by KAUST IRTS on 2023-10-23
PY - 2020/3/6
Y1 - 2020/3/6
N2 - Promoter (Cr, Mo and W) modified Ni/ZSM-5 catalysts were explored in the vapor phase conversion of γ-valerolactone (GVL) to ethyl valerate (EV; gasoline blender) at atmospheric pressure. Among the three different promoters (Cr, Mo and W) tested the Mo-modified catalyst was found to be the best candidate. In addition, this catalyst was found to be stable up to 50 h reaction time with an insignificant decrease in activity. The good catalytic performance is related to an optimal ratio of acid and hydrogenation functions provided by Ni2+ and Ni0, respectively. In situ FTIR spectroscopic studies revealed a strong adsorption of GVL on all catalysts which quickly reacts with dosed ethanol by formation of EV, most pronounced on the Mo-modified catalyst, while VA was identified as side product. These findings suggest the preferred GVL ring opening by cracking the C−O bond on the methyl side of the GVL molecule on this type of catalysts leading to pentenoic acid as intermediate, which is quickly hydrogenated and esterified.
AB - Promoter (Cr, Mo and W) modified Ni/ZSM-5 catalysts were explored in the vapor phase conversion of γ-valerolactone (GVL) to ethyl valerate (EV; gasoline blender) at atmospheric pressure. Among the three different promoters (Cr, Mo and W) tested the Mo-modified catalyst was found to be the best candidate. In addition, this catalyst was found to be stable up to 50 h reaction time with an insignificant decrease in activity. The good catalytic performance is related to an optimal ratio of acid and hydrogenation functions provided by Ni2+ and Ni0, respectively. In situ FTIR spectroscopic studies revealed a strong adsorption of GVL on all catalysts which quickly reacts with dosed ethanol by formation of EV, most pronounced on the Mo-modified catalyst, while VA was identified as side product. These findings suggest the preferred GVL ring opening by cracking the C−O bond on the methyl side of the GVL molecule on this type of catalysts leading to pentenoic acid as intermediate, which is quickly hydrogenated and esterified.
UR - https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cctc.201901966
UR - http://www.scopus.com/inward/record.url?scp=85078876545&partnerID=8YFLogxK
U2 - 10.1002/cctc.201901966
DO - 10.1002/cctc.201901966
M3 - Article
SN - 1867-3899
VL - 12
SP - 1341
EP - 1349
JO - ChemCatChem
JF - ChemCatChem
IS - 5
ER -