Grimm H.,Institute For Chemische Und Elektrochemische Verfahrenstechnik |
Kunz U.,Institute For Chemische Und Elektrochemische Verfahrenstechnik
Chemical Engineering and Technology | Year: 2015
A continuous process to produce carbon-supported platinum catalysts by polyol reduction was examined. The reactant dispersion was rapidly heated up to reaction temperature while flowing through a directly electrically heated tube followed by a downstream isothermic tubular reactor. Appropriate inner diameters corresponding to the desired short heating-up times were calculated. A certain lower limit for the inner diameter is caused by temporary pluggings of particle agglomerates circumventing steady-state operation. Tube diameters were evaluated with respect to heating-up times and plugging. It was proved that with a tubular reactor a continuous preparation of carbon nanotube-supported platinum catalysts with a low particle size and evenly distributed particles is possible. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.