Transport properties of gases through integrally skinned asymmetric composite membranes prepared from date pit powder and polysulfone

Abstract

Studies were conducted on transport properties and separation performance of date pit/polysulfone composite membranes for CO 2 , CH 4 , N 2 , He, and H 2 gases. Date seeds were obtained and processed into powder. Asymmetric flat sheet membrane was prepared by solvent casting method with 2-10 wt % date pit powder. Membrane characterization was done using high pressure gas permeation, X-ray diffraction, thermogravimetric, and scanning electron microscope analyses. The separation performance and the plasticization resistance property were evaluated in terms of gas permeability, selectivity, and plasticization pressure, respectively. Time dependent performance properties were evaluated up to a pressure of 40 bar for 75 days. Results obtained showed the highest selectivity values of 1.54 (He/H 2 ), 3.637 (He/N 2 ), 2.538 (He/CO 2 ), 2.779 (He/CH 4 ), 3.179 (H 2 /N 2 ), 3.907 (H 2 /CO 2 ), 1.519 (CH 4 /N 2 ), 1.650 (CO 2 /N 2 ), and 1.261 (CO 2 /CH 4 ) at 10 bar and 35 8C feed pressure and temperature, respectively. The resulting composite membrane showed about 39.50 and 66.94% increase in the selectivity of He/N 2 and CO 2 /CH 4 , respectively, as compared to the pure polysulfone membrane. Thus, the membrane composites possess some potentials in membrane gas separation.

Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO2 Separation with Temperature

“…Carruthers et al explored the effect of the change of geometry on integrally skinned polymer membranes from dense to HF geometry . MMMs in HF configuration have also been studied at laboratory scale for different polymer/filler combinations and dual‐layer spinning processes , but still the formation mechanism is not well‐known and a completely dense (defect‐free) selective layer is necessary to keep the selectivity of the material , usually needing caulking with silicone rubber , , .…”

Print-Assisted Layer - by - Layer Fabrication of Mixed-Matrix Membrane for Gas Separation

“…), T is the absolute temperature (K), dt dV is the volumetric flow rate obtained from the flowmeter ( s cm / 3 ) and 22,414 is the number of (Adewole, 2016). Similar patterns of particle distribution were found in single layer and 7-layer samples.…”

Enhanced Gas Separation Prowess Using Functionalized Lignin-Free Lignocellulosic Biomass/Polysulfone Composite Membranes

“…CMBs entail incorporating organic or inorganic materials (fillers) into the polymer matrix to explore the available micropores or functional groups for better interaction and efficient gas separation [ 12 , 13 ]. In comparison to the pure polymeric membranes, CMBs have been reported to show improved selectivity and higher permeability [ 14 ].…”