Experimental and Computational Investigation of Knoevenagel Condensation in Planetary Ball Mills

Chemical Engineering and Technology - Tập 37 Số 5 - Trang 857-864 - 2014
Christine Friederike Burmeister1,2,3, Achim Stolle1,2,4, Robert R. Schmidt4, Katharina Jacob4, Sandra Breitung‐Faes3, Arno Kwade3
1Achim Stolle, Friedrich-Schiller University Jena, Institute for Technical Chemistry and Environmental Chemistry, Jena, Germany
2Christine F. Burmeister, Technical University Braunschweig, Institute for Particle Technology (IPAT), Braunschweig, Germany
3Technical University Braunschweig, Institute for Particle Technology (IPAT), Braunschweig, Germany
4Friedrich-Schiller University Jena, Institute for Technical Chemistry and Environmental Chemistry, Jena, Germany

Tóm tắt

AbstractThe influence of several process parameters like milling time, ball‐to‐beaker volume ratio, diameter of milling balls, and rotation frequency on the Knoevenagel condensation of vanillin and barbituric acid in planetary ball mills was investigated. These parameters determine the amount of energy provided for the reaction. Additionally, numerical simulations were carried out to describe the stress conditions in detail and to compute the drive power and energy transfer which cannot be measured directly. The mill and experimental parameters were modeled by the discrete element method with adequate coefficients of friction and restitution required to describe the powder behavior in the system. The coefficients were determined by correlation of experiments and simulations.

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Thông tin xuất bản

Chemical Engineering and Technology

Tập 37 Số 5

857-864

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