Repositori URV

Identifier: TDX:1051

Handle: https://hdl.handle.net/20.500.11797/TDX1051

Authors:
Dubert, Diana Cristina

Abstract:
The thesis presents a new approach regarding the application of microtechnology in production of catalysts, specifically NH4-dawsonite by using microreactor technology. The aqueous solutions used to precipitate the material were defined as aluminium nitrate nonahydrate and ammonium carbonate. The mineral analogue preparation was first held within a 78μl volume split-recombine stainless steel micromixer (CPMM 1200/8 mixer) by optimizing the process parameters for a continuous time of production which in the present case is significantly affected by the channel clogging. Further, the synthesis was carried out within a pressurized micro-system and different geometries of the microchannel: T-shaped stainless steel, poly(metylmetacrylate) (PMMA) spilt-recombine Caterpillar micromixer and Y-shaped PMMA junction with two different mixing regimes (perfect (spli-recombine)/imperfect (T/Y-shaped microsystem)) with the aim of minimizing the clogging. The Y-junction approach was demonstrated to be a great alternative for minimizing the particle deposition on channel’s wall, clogging phenomenon being totally removed. This represents a significant step forward in process intensification with benefits within the industry. Over passing this step the possibility to transfer this new technology into industry is more and more tangible to become reality.