TY - JOUR
T1 - Enhancement of Catalytic Activity by γ-NiOOH for the Production of Methyl Lactate from Sugars in Near-Critical Methanol Solutions
AU - Lyu, Xilei
AU - Wang, Lixin
AU - Chen, Xujie
AU - Xu, Ling
AU - Wang, Juncheng
AU - Deng, Shuguang
AU - Lu, Xiuyang
N1 - Funding Information:
This research was supported by the National Natural Science Foundation of China (No. 21676243).
PY - 2019/3/6
Y1 - 2019/3/6
N2 - As-synthesized Ni-based Lewis acidic catalysts, with tunable concentrations of β-Ni(OH) 2 and γ-NiOOH, were tested on the conversion of sugars to methyl lactate (MLA) in near-critical methanol solutions. The concentration of γ-NiOOH increased with an increase in the Ni(NO 3 ) 2 ·6H 2 O/2-methylimidazole (Ni/2-Hmim) molar ratio. Compared to β-Ni(OH) 2 , the γ-NiOOH showed more mesopores in the catalyst, which facilitated the diffusion of reactant and products. Ni/2-Hmim-4 [Ni(NO 3 ) 2 ·6H 2 O/2-methylimidazole molar ratio = 4] exhibited the best catalytic activity. Under optimal conditions (180 °C for 12 h), the highest MLA yield was 41.9% on the conversion of glucose. Ni/2-Hmim-4 was employed to convert disaccharides to MLA. Notably, for sucrose, the reaction afforded a 38.7% MLA yield at 200 °C for 12 h. The catalyst was reusable for at least three cycles.
AB - As-synthesized Ni-based Lewis acidic catalysts, with tunable concentrations of β-Ni(OH) 2 and γ-NiOOH, were tested on the conversion of sugars to methyl lactate (MLA) in near-critical methanol solutions. The concentration of γ-NiOOH increased with an increase in the Ni(NO 3 ) 2 ·6H 2 O/2-methylimidazole (Ni/2-Hmim) molar ratio. Compared to β-Ni(OH) 2 , the γ-NiOOH showed more mesopores in the catalyst, which facilitated the diffusion of reactant and products. Ni/2-Hmim-4 [Ni(NO 3 ) 2 ·6H 2 O/2-methylimidazole molar ratio = 4] exhibited the best catalytic activity. Under optimal conditions (180 °C for 12 h), the highest MLA yield was 41.9% on the conversion of glucose. Ni/2-Hmim-4 was employed to convert disaccharides to MLA. Notably, for sucrose, the reaction afforded a 38.7% MLA yield at 200 °C for 12 h. The catalyst was reusable for at least three cycles.
UR - http://www.scopus.com/inward/record.url?scp=85062351757&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85062351757&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.8b06367
DO - 10.1021/acs.iecr.8b06367
M3 - Article
AN - SCOPUS:85062351757
VL - 58
SP - 3659
EP - 3665
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
SN - 0888-5885
IS - 9
ER -