Wall coating optimization for microchannel reactors

Ni Catalyst Coating on Fecralloy® Microchanneled Foils and Testing for Methane Steam Reforming

“…For the microchannel foil coating it has been found that a slurry viscosity of nearly 50 mPa·s was needed to get a mean coating layer thickness of 20 lm in the channels [19]. In Fig.…”

“…The optimal viscosity to coat the microchannel foils with a catalyst layer with a mean thickness of 20 lm is reported to be around 50 mPa·s [19]. In order to reduce the viscosity of the slurries after milling, the slurries were diluted with small amounts of water and the viscosity was controlled with a Haake viscometer.…”

“…There are some detailed studies dedicated to the catalyst support washcoating [18,19] but without final activity data of the prepared coatings.…”

“…They determine the catalyst loading on the microchannel walls and the shape of the coatings [19]. The viscosity is very sensitive to many factors like, for example, the interaction between catalyst particles and the solvent (influenced by the type of solvent employed, the particle size distribution of the powder, the amount of catalyst in the slurry, and the different additives employed) [19,20].…”

Nanostructured Zinc Oxide Nanorods with Copper Nanoparticles as a Microreformation Catalyst

“…[13,14] However, two key issues have hindered the realization of microreformers for catalysis, namely, poor adhesion between the catalyst layer and the microchannels and poor utilization of catalyst layer deposited in the form of thick film. [15] Notwithstanding, several approaches investigated to overcome these issues, catalyst immobilization, and its efficient utilization inside the microchannel remains a challenge. [16,17] Most of these approaches involve a two-step process, wherein active catalysts are prepared in the first step, followed by its immobilization on the surface of the microchannels in the second step.…”