Synthesis and composition modification of precipitate tubes in a confined flow reactor.

Precipitation reactions coupled to various transport phenomena, such as flow or diffusion, lead to the formation of different spatial gradients which can be influenced by tuning the experimental parameters (, reactant concentration, flow rate, reactor geometry, ). Thereby it gives us the opportunity to change the micro and macrostructure of the products. Herein, we investigate the precipitate tube formation in a flow-driven system applying a horizontal confined geometry for individual and composite alkaline earth metal (Mg(II), Ca(II), Sr(II), and Ba(II))-carbonate systems.

Enhancing the yield of calcium carbonate precipitation by obstacles in laminar flow in a confined geometry.

Flow-driven precipitation experiments are performed in model porous media shaped within the confinement of a Hele-Shaw cell. Precipitation pattern formation and the yield of the reaction are investigated when borosilicate glass beads of different sizes are used in a mono-layer arrangement. The trend of the amount of precipitate produced in various porous media is estimated via visual observation.

The impact of reaction rate on the formation of flow-driven confined precipitate patterns.

The production of solid materials via chemical reactions is abundant both in nature and in industrial processes. Precipitation reactions coupled with transport phenomena lead to enhanced product properties not observed in the traditional well-stirred systems. Herein, we present a flow-driven pattern formation upon radial injection in a confined geometry for various chemical systems to show how reaction kinetics modifies the emerging precipitation patterns.

Influence of microscopic precipitate structures on macroscopic pattern formation in reactive flows in a confined geometry.

Thanks to the coupling between chemical precipitation reactions and hydrodynamics, new dynamic phenomena may be obtained and new types of materials can be synthesized. Here we experimentally investigate how the characteristic microscopic crystal properties affect the macroscopic pattern obtained. To shed light on such interactions, different reactant solutions are radially injected into a calcium chloride solution at different volumetric flow rates in a confined geometry.