Dual layer hollow fiber sorbents: Concept, fabrication and characterization

Photocatalytic degradation of nonylphenol by immobilized TiO2 in dual layer hollow fibre membranes

“…There is a very limited publication reported on the dual layer hollow fibre membrane structure for simultaneous reaction and separation. As mentioned by Bhandari [18], the morphology of inner and outer layer of hollow fibre membrane are formed based on the required properties in each layer by manipulating of spinning parameters.…”

In situ Formation of a Monodispersed Spherical Mesoporous Nanosilica–Torlon Hollow‐Fiber Composite for Carbon Dioxide Capture

“…Therefore, alternative low‐cost carbon capture technologies have been suggested to circumvent problems associated with amine‐based systems . Recently, Koros et al . demonstrated a new CO 2 ‐capture system based on a hollow‐fiber‐based solid sorbent (organic–inorganic hybrid materials) that operates in the rapid temperature swing adsorption (RTSA) mode to avoid many deficiencies associated with conventional cyclic sorption processes.…”

“…demonstrated a new CO 2 ‐capture system based on a hollow‐fiber‐based solid sorbent (organic–inorganic hybrid materials) that operates in the rapid temperature swing adsorption (RTSA) mode to avoid many deficiencies associated with conventional cyclic sorption processes. Hollow‐fiber sorbents are pseudomonolithic materials with a porous polymer that contains high loadings of selective solid adsorbent particles such as silica, zeolite, metal–organic frameworks, or ionic liquids as “fillers” . The fiber sorbent morphology and structure offer advantages over traditional spherical pellets, which include a high surface area to volume ratio, avoidance of particle attrition, low pressure drop, increase in flow pattern reliability for scale‐up, and the ability to tune mass transfer resistances .…”

“…The fiber sorbent morphology and structure offer advantages over traditional spherical pellets, which include a high surface area to volume ratio, avoidance of particle attrition, low pressure drop, increase in flow pattern reliability for scale‐up, and the ability to tune mass transfer resistances . However, fiber sorbents require high sorbent loadings (>50 wt %) to achieve sorption capacities comparable to conventional packed‐bed technology . The creation of such high sorbent loadings is challenging, and sorbent particle sizes are typically large (in the range 3–10 μm), which can lead to slow kinetics limitations and low capacities …”

Fabrication of Dual Layer Hollow Fibre Membranes for Photocatalytic Degradation of Organic Pollutants

“…The major problem in dual layer hollow fibre membranes is low integrity and delamination problem. A good adhesion between inner and outer polymers dope can only be achieved by properly control the spinning parameters such as bore fluid composition, spinning process temperature, air gap height [14] and ratio of outer layer dope flow rate to inner dope flow rate [15].…”