Abstract Severe polysulfide dissolution and shuttling are the main challenges that plague long cycle life capacity retention of lithium‐sulfur (Li‐S) batteries. To address these challenges, efficient separators designed modified with a dual functional bimetallic metal‐organic framework (MOF). Flower‐shaped MOFs (i.e., Fe‐ZIF‐8) nanostructured pores synthesized at 35 °C in water by introducing dopant metal sites (Fe), which then coated on polypropylene (PP) separator to provide selective...

In this work, defect-free thin-film-composite (TFC) hollow fiber membranes containing various amino acid salts as CO2 facilitated transport carriers were fabricated via dip-coating. Four different salts, i.e., potassium prolinate (ProK), argininate (ArgK), glycinate (GlyK) and cysteinate (CysK), selected embedded within polyvinyl alcohol (PVA) matrix. TGA, FTIR, SEM humid mixed gas permeation test used for the evaluation. Experiments show that adding into PVA matrix significantly increases...

Membrane technology for CO2/H2 separation, especially when using CO2-selective membranes to keep H2 on the high-pressure retentate side, has been considered promising and energy-efficient further transport utilization. This work prepared optimized a membrane based polyvinylamine (PVAm) with embedded graphene oxide (GO) grafted GO separation. The facilitated effect of PVAm enhances CO2 transport, while GO-based 2D nanosheets bring in barrier compensate high diffusivity. GO-modified surface...

Nanocellulose is a promising and sustainable biobased nanomaterial because of its excellent mechanical properties, biocompatibility, natural abundance, especially high aspect ratio. Interest in applying nanocellulose as nanofillers membrane fabrication has been growing rapidly recent years. In the present work, crystals (CNCs) fibers (CNFs) were incorporated into polyvinyl alcohol (PVA) to prepare evenly dispersed nanocomposites. The resultant nanocomposite materials containing up 80 wt %...

Realization of suitable membrane-based technology for efficient CO2 capture to mitigate climate change relies on the development thin-film composite (TFC) membranes with superior separation performance. Graphene oxide (GO), due its 2D morphology, intrinsic strength and chemical compatibility, was used as a nanofiller enhance performance stability facilitated transport membrane. SHPAA (sterically hindered polyallylamine)-based blend matrix selected polymeric material in this work. The high...

Alarming increase in global CO2 emissions warrants acceleration of capture technologies. In this work, testing pre-pilot scale membrane modules containing hybrid facilitated transport membranes hollow fiber configuration is reported. The tests were carried out using real flue gas from a slipstream the Colacem cement plant located Gubbio, Italy. With fabricated modules, flux up to 750 NL m−2h−1 with permeate purity ranging 50 55 vol% was recorded. All showed increased permeance industrial...

The transition toward sustainable processing entails the use of biobased alternatives as functional materials to reduce overall carbon footprint. Nanocellulose, due its natural availability, biodegradability, excellent mechanical properties, tunable surface, and high aspect ratio, is attracting more interest a nanoscale additive in polymeric membranes. In this work, an effective way modify nanocellulose fibril surfaces for performance enhancement CO2 separation membranes has been...

A class of “green” hybrid membranes composed nanocellulose and an ionic liquid exhibits exceptional separation properties arising from a humidity-responsive size-exclusive “gate” that allows selective CO₂ permeation.

In this study, cellulose nanofibrils (CNF) of high charge (H-P-CNF) and screened size (H-P-CNF-S) were fabricated by increasing the phosphorylated (P-CNFs) during pre-treatment step CNF production. Results show that H-P-CNF have a significantly higher (3.41 mmol g−1) compared with P-CNF (1.86 g−1). Centrifugation gave supernatant (5.4 reduced (H-P-CNF-S). These tailored nanocelluloses added to polyvinyl alcohol (PVA) solutions suspensions successfully coated on porous polysulfone (PSf)...

Urgent actions are needed to reduce CO2 emissions and mitigate the increasingly severe impacts of climate change. Since 1990s, membrane research group (MEMFO) at Norwegian University Science Technology has been committed developing effective membranes processes for separation. MEMFO's can be categorized into five main themes: facilitated transport membranes, hybrid carbon contactors, related modeling process simulation. These themes tied industrial applications in capture from flue gas,...

The configuration of thin film composite (TFC) in the form hollow fiber is desired for gas separation membranes to achieve better permeation and higher packing density. In this work, we developed tested TFC with a defect-free, ultrathin (200 nm) hybrid facilitated transport selective layer consisting three phases, i.e., host polymeric matrix fixed-site carriers, 2D inorganic filler, and, CO2-philic mobile carrier. effect lateral size graphene oxide (GO)-based fillers on CO2 were studied...

In this work, a membrane separation process is designed and optimized to purify dark fermentative biohydrogen by removing CO2. A CO2-selective PVAm-based nanocomposite was selected considering its high CO2/H2 performance unique features suitable for the process. We tested performances under conditions provide more accurate simulation basis. Several design scenarios were investigated. two-stage with recycle stream determined as optimal design, in which specific cost purifying H2 99.5 vol%...

Numerous studies have been reported on CO2 facilitated transport membrane synthesis, but few works dealt with the interaction between material synthesis and modelling aspects for optimization purposes. In this work, a hybrid fixed-site carrier was prepared using polyallylamine 10 wt% polyvinyl alcohol 0.2 graphene oxide. The tested feed gases different relative humidity at partial pressures. Selected models in literature were used to fit experimental data good agreement. key dimensionless...