Hydrogenation of levulinic acid with and without external hydrogen over Ni/SBA-15 catalystopen access
- Authors
- Varkolu, Mohan; Bathula, Hari Babu; Suh, Young-Woong; Burri, David Raju; Kamaraju, Seetha Rama Rao
- Issue Date
- Sep-2018
- Publisher
- SPRINGER HEIDELBERG
- Keywords
- Hydrogenation; Levulinic acid; gamma-Valerolactone; With external H-2; Without external H-2; 30wt% Ni; SBA-15
- Citation
- APPLIED PETROCHEMICAL RESEARCH, v.8, no.3, pp.153 - 162
- Journal Title
- APPLIED PETROCHEMICAL RESEARCH
- Volume
- 8
- Number
- 3
- Start Page
- 153
- End Page
- 162
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/149473
- DOI
- 10.1007/s13203-018-0203-z
- ISSN
- 2190-5525
- Abstract
- A series of Ni/SBA-15 catalysts were prepared by impregnation method for the hydrogenation of levulinic acid (LA) to -valerolactone in a fixed bed reactor at atmospheric pressure. The catalysts were characterized by XRD, TPR, AAS, Pulse chemisorption, SEM-EDAX, TEM, BET Surface area and XPS. The catalyst 30wt% Ni/SBA-15 exhibited excellent catalytic performance (97% yield) at 250 degrees C due to the presence of superior number of active surface Ni species. While 30wt% Ni/SiO2 catalyst showed lower catalytic activity (87% yield) at about similar conversion. The co-feeding of formic acid (FA) and water (impurities) with levulinic acid was also evaluated over 30wt% Ni/SBA-15 which yielded excellent levulinic acid conversion. The noteworthy results were obtained at a molar ratio of FA/LA=5. The constant catalytic activity during 10h experiment with an external H-2 flow has showed the sturdiness of the Ni/SBA-15 catalyst.On the other hand, a slight decrease in conversion as well as yield during the time-on-stream in the absence of external H-2 flow was attributed to the accumulation of carbon species on the catalyst surface.
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