Membrane-Based Gas Separation of Ethylene/Ethylene Oxide Mixtures for Product Enrichment in Microreactor Technology

Cellulose acetate/nanoclay composite membranes with enhanced mechanical properties and improved permeance in gas separation

“…It was also reported in the literature that higher concentration of the nanoclay additive in the range of 2–6 wt% (higher than in this research) could provide higher hydrophilicity with lower porosity 33 . It was also shown in the literature that solubility of gases in membrane was the main factor affecting the selectivity of membranes over the molecular sizes of gases 10 . To sum up, the permeance and selectivity of membranes depend on various factors, including the membrane pore size, density and crystallinity of the membrane materials, and polarity, solubility and molecular size of the gases 43,44 .…”

“…9 On the other hand, the membrane technology is an alternative method to design a process that can separate gases with differences in diffusion abilities, which depends on the molecular sizes, molecular shapes, solubilities and polarities of substances and products. 10 In addition to the physical and chemical properties of substances and products, the diffusion abilities generally also depend on the physical and chemical characteristics of the membrane materials. Various non-biodegradable ceramics and polymers such as zeolite, silicone, polyimide (kapton), polystyrene, and poly(ethylene terephthalate) are used as membrane materials in gas separation applications.…”

Cellulose acetate/nanoclay composite membranes with enhanced mechanical properties and improved permeance in gas separation

“…It was also reported in the literature that higher concentration of the nanoclay additive in the range of 2–6 wt% (higher than in this research) could provide higher hydrophilicity with lower porosity 33 . It was also shown in the literature that solubility of gases in membrane was the main factor affecting the selectivity of membranes over the molecular sizes of gases 10 . To sum up, the permeance and selectivity of membranes depend on various factors, including the membrane pore size, density and crystallinity of the membrane materials, and polarity, solubility and molecular size of the gases 43,44 .…”

“…9 On the other hand, the membrane technology is an alternative method to design a process that can separate gases with differences in diffusion abilities, which depends on the molecular sizes, molecular shapes, solubilities and polarities of substances and products. 10 In addition to the physical and chemical properties of substances and products, the diffusion abilities generally also depend on the physical and chemical characteristics of the membrane materials. Various non-biodegradable ceramics and polymers such as zeolite, silicone, polyimide (kapton), polystyrene, and poly(ethylene terephthalate) are used as membrane materials in gas separation applications.…”

Functionalized copolyimide membranes for the separation of gaseous and liquid mixtures

“…3). It has been found in several studies that plasticization occurs if polyimides are exposed to high partial pressure of CO 2 [23–24], hydrocarbons, e.g., propylene and propane [25–26] or ethylene oxide [27]. Strong plasticization can even lead to a partial dissolution of the membrane as it has been found in aromatic/aliphatic separation [28].…”

“…Carboxy group containing 6FDA-based polyimides and copolyimides have been developed resulting in functional polymers which can be cross-linked or further modified. Consequently, plasticization effects can be reduced very efficiently [25,27,40–41]. As shown in Fig.…”

Predicting the solubility of gases, vapors, and supercritical fluids in amorphous polymers from electron density using convolutional neural networks

“…The dataset comprises 14 808 experimental or derived data points from 257 sources, 17,64–318 featuring 102 polymers and 79 solvents/gases, which together form 497 polymer–gas pairs. A total of 256 unique chemical compounds were considered, accounting for different repeating units of the same polymer, with 2462 unique conformers.…”

Cellulose acetate/nanoclay composite membranes with enhanced mechanical properties and improved permeance in gas separation

“…It was also reported in the literature that higher concentration of the nanoclay additive in the range of 2–6 wt% (higher than in this research) could provide higher hydrophilicity with lower porosity 33 . It was also shown in the literature that solubility of gases in membrane was the main factor affecting the selectivity of membranes over the molecular sizes of gases 10 . To sum up, the permeance and selectivity of membranes depend on various factors, including the membrane pore size, density and crystallinity of the membrane materials, and polarity, solubility and molecular size of the gases 43,44 .…”

“…9 On the other hand, the membrane technology is an alternative method to design a process that can separate gases with differences in diffusion abilities, which depends on the molecular sizes, molecular shapes, solubilities and polarities of substances and products. 10 In addition to the physical and chemical properties of substances and products, the diffusion abilities generally also depend on the physical and chemical characteristics of the membrane materials. Various non-biodegradable ceramics and polymers such as zeolite, silicone, polyimide (kapton), polystyrene, and poly(ethylene terephthalate) are used as membrane materials in gas separation applications.…”

Functionalized copolyimide membranes for the separation of gaseous and liquid mixtures

“…3). It has been found in several studies that plasticization occurs if polyimides are exposed to high partial pressure of CO 2 [23–24], hydrocarbons, e.g., propylene and propane [25–26] or ethylene oxide [27]. Strong plasticization can even lead to a partial dissolution of the membrane as it has been found in aromatic/aliphatic separation [28].…”

“…Carboxy group containing 6FDA-based polyimides and copolyimides have been developed resulting in functional polymers which can be cross-linked or further modified. Consequently, plasticization effects can be reduced very efficiently [25,27,40–41]. As shown in Fig.…”

Predicting the solubility of gases, vapors, and supercritical fluids in amorphous polymers from electron density using convolutional neural networks

“…The dataset comprises 14 808 experimental or derived data points from 257 sources, 17,64–318 featuring 102 polymers and 79 solvents/gases, which together form 497 polymer–gas pairs. A total of 256 unique chemical compounds were considered, accounting for different repeating units of the same polymer, with 2462 unique conformers.…”

Cellulose acetate/nanoclay composite membranes with enhanced mechanical properties and improved permeance in gas separation

“…It was also reported in the literature that higher concentration of the nanoclay additive in the range of 2–6 wt% (higher than in this research) could provide higher hydrophilicity with lower porosity 33 . It was also shown in the literature that solubility of gases in membrane was the main factor affecting the selectivity of membranes over the molecular sizes of gases 10 . To sum up, the permeance and selectivity of membranes depend on various factors, including the membrane pore size, density and crystallinity of the membrane materials, and polarity, solubility and molecular size of the gases 43,44 .…”

“…9 On the other hand, the membrane technology is an alternative method to design a process that can separate gases with differences in diffusion abilities, which depends on the molecular sizes, molecular shapes, solubilities and polarities of substances and products. 10 In addition to the physical and chemical properties of substances and products, the diffusion abilities generally also depend on the physical and chemical characteristics of the membrane materials. Various non-biodegradable ceramics and polymers such as zeolite, silicone, polyimide (kapton), polystyrene, and poly(ethylene terephthalate) are used as membrane materials in gas separation applications.…”

Functionalized copolyimide membranes for the separation of gaseous and liquid mixtures

“…3). It has been found in several studies that plasticization occurs if polyimides are exposed to high partial pressure of CO 2 [23–24], hydrocarbons, e.g., propylene and propane [25–26] or ethylene oxide [27]. Strong plasticization can even lead to a partial dissolution of the membrane as it has been found in aromatic/aliphatic separation [28].…”

“…Carboxy group containing 6FDA-based polyimides and copolyimides have been developed resulting in functional polymers which can be cross-linked or further modified. Consequently, plasticization effects can be reduced very efficiently [25,27,40–41]. As shown in Fig.…”

Predicting the solubility of gases, vapors, and supercritical fluids in amorphous polymers from electron density using convolutional neural networks

“…The dataset comprises 14 808 experimental or derived data points from 257 sources, 17,64–318 featuring 102 polymers and 79 solvents/gases, which together form 497 polymer–gas pairs. A total of 256 unique chemical compounds were considered, accounting for different repeating units of the same polymer, with 2462 unique conformers.…”