Eric Joannet

Palladium supported on filamentous active carbon as effective catalyst for liquid-phase hydrogenation of 2-butyne-1,4-diol to 2-butene-1,4-diol

Structured palladium catalysts suitable for three-phase reactions have been developed based on woven fabrics of active carbon fibers (ACF) as the catalytic supports. The Pd/ACF were tested in liq.-phase hydrogenation of 2-butyne-1,4-diol showing a selectivity towards 2-butene-1,4-diol up to 97% at conversions up to 80%. Multiple reuse of the catalyst with stable activity/selectivity in a batch reactor was also demonstrated. The reaction kinetics was studied and the main kinetic parameters were obtained. Assuming a Langmuir-Hinshelwood kinetics and a weak hydrogen adsorption a suitable kinetic model was developed consistent with the exptl. data. [on SciFinder (R)]

Microchannel Reactor for the Partial Oxidation of Isoprene

The partial oxidation of isoprene to citraconic anhydride (CA) is used to test the opportunities of the microchannel reactor system. CA is mainly used in the preparation of synthetic resins but also in the synthesis of Pharmaceuticals [1]. Up to now CA is produced in a complex process with itaconic acid as starting material. An easier way of synthesizing CA could be the heterogeneously catalyzed oxidation of isoprene in the vapor phase. As shown in figure (1) the reaction is highly exothermic. In addition there is a high temperature sensitivity of the selectivities to the partially oxidized products.

Microchannel Reactors for Partial Oxidation of Isoprene

Reference LGRC-ARTICLE-2001-020doi:10.1002/1522-2640(200106)73:6 3.0.CO;2-O Record created on 2006-04-18, modified on 2016-08-08