Selective hydrodeoxygenation of tartaric acid to succinic acid

作者：Fu Jiayi; Vasiliadou Efterpi S; Goulas Konstantinos A; Saha Basudeb; Vlachos Dionisios G^*

来源：Catalysis Science & Technology, 2017, 7(21): 4944-4954.

DOI：10.1039/c7cy01374d

A novel one-step process for catalytic production of succinic acid from tartaric acid, which is largely available in the waste streams of wine making, is developed. A liquid-phase system comprised of a molybdenum oxide catalyst supported on carbon black (MoOx/BC) and hydrobromic acid in acetic acid under a H-2 atmosphere is effective for selective cleavage of the C-O bonds of tartaric acid and selective hydrogenation of the resulting unsaturated carbons. Temperature, hydrogen pressure, and catalyst pre-treatment are optimized to understand their impact on catalytic activity and product distribution, leading to an 87% yield of succinic acid at 170 degrees C. Importantly, reduction of the carboxyl groups and C-C bond cleavage are retarded. Pre-reduction and characterization studies (TPR, XRD, XPS, and XAS) reveal that the high catalyst activity of MoOx/BC is correlated with the lower Mo oxidation states (+4 to 0) formed during pre-reduction that promote cleavage of the C-O bonds of tartaric acid and hydrogenation of the C=C bond of the intermediate fumaric acid. Recyclability studies and structural characterization of the recovered catalyst indicate that MoOx/BC remains active upon reuse.

• 出版日期2017-11-7