Effect of nanoparticulate boehmite sol as a dispersant for slurry compaction of alumina ceramics

A low-temperature partial-oxidation-methanol micro reformer with high fuel conversion rate and hydrogen production yield

“…Recently, many researches mixed AlOOH-based binder with catalyst to enhance the adhesion between catalyst and Si-based channel via a fill-and-dry coating process [17]. However, AlOOHbased particle occupied significant spaces for blocking catalytic particle reacting in micro channels which greatly reduce the performance of micro reformer in spite of the enhancement of the adhesion.…”

“…Hence, Hsieh et al [16] depicted that by combining interdigitated and mash type of channels together the pressure drop of the reformer can be lowered down, thus enhancing reformer performance. Moreover, some reports [16,17] also indicated that high reaction surface area, well coated catalyst, and low pressure drop of the fluidic channels, were the three keys to keep reformer in high performance. These conditions can be achieved by introducing catalyst slurry with fill-and-dry coating process to form a catalyst layer with porous and relatively fine structure on the channel's wall [18,19].…”

Wall coating optimization for microchannel reactors

“…(i) It keeps the boehmite in its dispersed form, the sol-gel transition taking place at pH values higher then 4 [30]. This in turn provides a reasonable fluidity of suspensions, even at high solid loading, since the boehmite behaves as a plasticizer [31] as well; (ii) the amount of polyelectrolyte adsorbed is increased due to the larger density of positive surface charges facilitating the anchoring of more carboxylic groups.…”

Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion

“…The addition of boehmite 2 Journal of Nanomaterials nanoparticles to ceramic powders can produce pastes with adequate extrusion behaviors (plasticity and liquid retention capacity) resulting in formed bodies with characteristics (green density and strength) similar to those obtained for pastes containing plastic clays [7,8]. Boehmite has also been used as a processing additive in other forming methods, such as sol-gel, cold isostatic pressing, and slurry compaction [9][10][11].…”