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Continuous Fuel Cell Catalyst Preparation in a Directly Electrically Heated Tubular Reactor
Author(s) -
Grimm Heiner,
Kunz Ulrich
Publication year - 2015
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400767
Subject(s) - agglomerate , platinum , catalysis , materials science , dispersion (optics) , particle (ecology) , chemical engineering , tube (container) , particle size , continuous production , platinum nanoparticles , carbon nanotube , composite material , chemistry , organic chemistry , physics , oceanography , engineering , optics , geology
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.