Jia L.,Xiamen University |
Jia L.,National Engineering Laboratory for Green Chemical Productions of Alcohols |
Gao J.,Xiamen University |
Gao J.,National Engineering Laboratory for Green Chemical Productions of Alcohols |
And 3 more authors.
Journal of Rare Earths | Year: 2010
A series of pre-reduced LaMn1-xCuxO3 (0≤x<1) catalysts for methanol synthesis from CO2 hydrogenation were prepared by a sol-gel method. The catalytic performances were strongly dependent on the copper content. XRD investigation revealed that the single perovskite structure could be preserved after being reduced, when the substitution for Mn by Cu was less than 50. The Cu-doped (x=0.5) LaMnO 3 was much more active than the other catalysts for reaction, showing CO2 conversion up to 11.33 and methanol selectivity close to 82.14. The structural features of samples (x≤0.5) were studied. It was determined that copper existed as Cu+ species under reduction conditions. H 2 was adsorbed on Cu+ sites and CO2 was activated on the medium CO2 active species in the lattice. The strong interaction between Cu+ and Mn inhibited the further reduction from Cu+ to Cu0 and made the fine dispersion of medium basic site to adsorb CO2, contributing to reactivity. © 2010 The Chinese Society of Rare Earths. Source
Lin W.,National Engineering Laboratory for Green Chemical Productions of Alcohols |
Lin W.,Key Laboratory for Chemical Biology of Fujian Province |
Wang H.,National Engineering Laboratory for Green Chemical Productions of Alcohols |
Wang H.,Key Laboratory for Chemical Biology of Fujian Province |
And 5 more authors.
Industrial and Engineering Chemistry Research | Year: 2010
Potassium diformate (KDF) has been regarded as an alternative to antibiotic growth promoters for animals. This paper delineates a 100% atom economical process for the preparation of KDF from formic acid and potassium formate. Parametric optimization of the synthesis was conducted with respect to reaction time, reaction temperature, and molar ratio of the reactants by employing orthogonal design of experiment method. The results manifested a molar ratio of HCOOH to HCOOK of 1.3, reaction temperature of 65 °C, and reaction time of 30 min as the optimal conditions with a KDF product yield of 94.0%. Efforts were also made to explore the antimold performance of KDF on animal feed using the plate count method. Compared with sodium diacetate (SDA), the widely used mold inhibitor, KDF exhibited even better antimold performance for animal feed. To our knowledge, this work first proved the applicability of KDF as a mold inhibitor for animal feed. © 2010 American Chemical Society. Source