A5083553098- Membrane Separation and Gas Transport
- Covalent Organic Framework Applications
- Synthesis and properties of polymers
- Membrane Separation Technologies
- Graphene research and applications
- Metal-Organic Frameworks: Synthesis and Applications
- Muon and positron interactions and applications
- Anaerobic Digestion and Biogas Production
- Dielectric materials and actuators
- Advanced Battery Materials and Technologies
- Polymer Foaming and Composites
- Mesoporous Materials and Catalysis
- Carbon Dioxide Capture Technologies
- Enzyme Catalysis and Immobilization
- Fluid Dynamics and Mixing
- Catalysts for Methane Reforming
- Microbial bioremediation and biosurfactants
- Innovative Microfluidic and Catalytic Techniques Innovation
- Membrane-based Ion Separation Techniques
- biodegradable polymer synthesis and properties
- Heat and Mass Transfer in Porous Media
Universidad de Valladolid
2020-2024
Universidad Autónoma Metropolitana
2018
Biogas and biohydrogen, due to their renewable nature zero carbon footprint, are considered two of the gaseous biofuels that will replace conventional fossil fuels. from anaerobic digestion must be purified converted into high-quality biomethane prior use as a vehicle fuel or injection natural gas networks. Likewise, enrichment biohydrogen dark fermentation requires removal CO2, which is main pollutant this new biofuel. Currently, CO2 both biogas carried out by means physical/chemical...
In this work, CO2 adsorption at 273.15 K and N2 77 of mixed matrix membranes has been studied, as a method to directly determine their fractional free volume (FFV). These consist continuous phase copoly(o-hydroxyamide)s (HPA) or copoly(o-hydroxyamide-amide)s (PAA) relatively highly porous polymer network filler (PPN1). Both the pure copolymers (MMMs) have analyzed before after thermal rearrangement (TR) process. The results allowed characterizing pore size distribution studied in 3–15 Å...
A set of thermally rearranged mixed matrix membranes (TR-MMMs) was manufactured and tested for gas separation. These were obtained through the thermal treatment a precursor MMM with microporous polymer network an o-hydroxypolyamide,(HPA) created reaction 2,2-bis(3-amino-4-hydroxyphenyl)-hexafluoropropane (APAF) 5'-terbutil-m-terfenilo-3,3″-dicarboxylic acid dichloride (tBTmCl). This HPA blended different percentages porous (PPN) filler, which produced separation MMMs enhanced permeability...
A hydroxypolyamide (HPA) manufactured from 2,2-bis(3-amino-4-hydroxy phenyl)-hexafluoropropane (APAF) diamine and 5′-terbutyl-m-terphenyl-4,4′′-dicarboxylic acid chloride (tBTpCl), a copolyimide produced by stochiometric copolymerization of APAF 4,4′-(hexafluoroisopropylidene) (6FpDA), using the same diacid chloride, were obtained used as polymeric matrixes in mixed matrix membranes (MMMs) loaded with 20% (w/w) two porous polymer networks (triptycene-isatin, PPN-1,...
Mixed-matrix membranes (MMMs) consisting of an
Mixed matrix membranes (MMMs) were formed by using seven polymeric matrices with a wide range of permeabilities. All the have been polyimides, namely: P84, Pi-DAPOH, Pi-DAROH, Matrimid, Pi-HABAc, PI-DAM, and PIM-1 in order increasing O2 permeability. A fixed (10%) concentration microporous organic polymer (TFAP-Trp), combination trifluoroacetophenone triptycene, was added as porous filler. The material properties well their separation performances for multiple pure gases, specifically...
Copoly(o-hydroxyamide)s (HPA) and copoly(o-hydroxyamide-amide)s (PAA) have been synthesized to be used as continuous phases in mixed matrix membranes (MMMs). These polymeric matrices were blended with different loads (15 30 wt.%) of a relatively highly microporous porous polymer network (PPN). SEM images the manufactured MMMs exhibited good compatibility between two for all studied, their mechanical properties shown enough even after thermal treatment. The WAX results show that addition PPN...
Mixed matrix membranes (MMMs) consisting of a blend hydroxypolyamide (HPA) and variable loads porous polymer network (PPN) were thermally treated to induce the transformation HPA polybenzoxazole (β-TR-PBO). Here, was having two hexafluoropropyilidene moieties, 6FCl-APAF, while PPN prepared by reacting triptycene (TRP) trifluoroacetophenone (TFAP) in superacid solution. The most probable size particles 75 nm with quite large distributions. resulting analyzed SEM AFM. Up 30% loads, both AFM...
The relationships between gas permeability and free volume fraction, intersegmental distance, glass transition temperature, are investigated. They analyzed for He, CO2, O2, CH4, N2 gases five similar polyimides with a wide range of permeabilities, from very low to extremely high ones. It has been established here that there is an exponential relationship the most probable distance as measured by WAXS; in both cases, coefficient depends on kinetic diameter quadratic polynomial preexponential...
High-performance polymers for membrane gas separation require the careful design of structure-porous relationship.
A good integration of the polymer materials that form a mixed-matrix membrane (MMM) for gas separation is essential to reaching interesting permselective properties. In this work, porous network (PPN), obtained by combining triptycene and trifluoroacetophenone, has been used as filler, which was blended with two o-hydroxypolyamides (HPAs) act matrices. These matrices have thermally treated induce thermal rearrangement (TR) HPAs polybenzoxazoles (β-TR-PBOs) through solid-state reaction. For...
The legislation is limiting the use of harmful organic solvents in industrial processes. elaboration clear guidelines for minimizing solvent residues, and development implementation circular...
A new approach to produce porous membranes with dense or top layer is proposed in this work by employing a solvent-free method. PMMA/MAM formulations were selected as base material order create open-cell and close-cell structures gas dissolution foaming CO2 blowing agent. Furthermore, introducing the diffusion barrier foaming, it possible control thickness of both edges, obtaining defect-free membranes. The effectiveness nanocellular polymers separation was evaluated. In way, permeability,...
A new approach to produce porous membranes with dense or top layer is proposed in this work by employing a solvent-free method. PMMA/MAM formulations were selected as base material order create open-cell close-cell structures gas dissolution foaming CO2 blowing agent. Furthermore, introducing the diffusion barrier foaming, it possible control thickness of both edges, obtaining defect-free (i.e., completely without pin-holes). The effectiveness nanocellular polymers separation was evaluated....