Article
Biotechnology & Applied Microbiology
Samy Yousef, Justas Sereika, Andrius Tonkonogovas, Tawheed Hashem, Alaa Mohamed
Summary: This research aims to study the influence of high temperatures and pressure on the selectivity performance of Polyethersulfone (PES) membranes for CO2/N2, CO2/H2, and CO2/CH4, and their potential applications in biogas upgrading systems. The results showed that low pressure and high temperature can enhance the selectivity performance and improve gas permeability. PES membranes are considered a promising technology for biogas upgrading with high selectivity, especially at high separation temperatures and low pressure.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Chemical
Yonghong Wang, Yi Zhou, Xinru Zhang, Yin Gao, Jinping Li
Summary: By incorporating microporous sodium zeoliteY (NaY) into sulfonated poly (ether ether ketone) (SPEEK), mixed-matrix membranes (MMMs) for CO2/N2 separation were successfully engineered with improved gas separation properties. The even distribution of NaY particles in the SPEEK matrix forming nanochannels enhanced CO2 permeability and selectivity, leading to superior separation performance compared to pristine SPEEK membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Gholamreza Vahedi Sarrigani, Jia Ding, Amirali Ebrahimi Ghadi, David Alam, Paul Fitzgerald, Dianne E. Wiley, David K. Wang
Summary: This study investigates the application of tubular polyetherimide (PEI) membranes prepared by dip-coating and multilayer assembly techniques in CO2 and H2 transport and CO2/N2 and H2/N2 selectivity. The results show that the permeability and selectivity of the membranes depend on the deposition cycle during dip-coating. For binary gas mixture separation, 100% CO2 and H2 purity is achieved regardless of the feed gas concentration. The PEI membrane exhibits interfacial confinement phenomenon, and the subtle change in imide group conformation contributes to increased polymer amorphicity and exclusive H2 and CO2 transport.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Victor Selmert, Ansgar Kretzschmar, Henning Weinrich, Hermann Tempel, Hans Kungl, Ruediger-A. Eichel
Summary: The study investigates the CO2 separation capabilities of polyacrylonitrile-based carbon nanofibers carbonized at various temperatures. The results show that CNFs carbonized at 600 or 700 degrees C exhibit high selectivity, long-term stability, and fast adsorption kinetics, making them promising candidates for CO2 capture.
Article
Polymer Science
Angel de J. Montes Luna, Nidia C. Fuentes Lopez, Griselda Castruita de Leon, Odilia Perez Camacho, Claudia Y. Yeverino Miranda, Yibran A. Perera Mercado
Summary: In this study, polybenzimidazole (PBI) and natural zeolite-based mixed matrix membranes (MMMs) were prepared and their transport properties for binary and ternary mixed-gas separation were investigated. The MMMs showed improved perm-selectivity properties compared to the PBI polymeric membranes, favoring the permeation of CO2 and N-2. Through thermal properties analysis and X-Ray Diffraction, it was found that the MMMs membranes have higher thermal stability and the zeolite signals combine with the amorphous dome from the polymeric matrix.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Chemical
Ting Wu, Ying Tu, Wen Liu, Zhen Sun, Meihua Zhu, Xuezhong He, Tian Gui, Xiangshu Chen, Hidetoshi Kita
Summary: In this study, a co-solvent strategy using isopropanol as the organic co-solvent was employed to synthesize AlPO-18 membrane. The addition of isopropanol not only accelerated the crystallization of AlPO-18 membrane, but also increased the size of crystals on the membrane, leading to a reduced synthesis time.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Polymer Science
Ying Li, Danlin Chen, Xuezhong He
Summary: The unique properties of PVA and PSf provide a great opportunity for CO2-separation membrane development. The study focuses on fabricating PVA/PSf composite membranes for CO2/N-2 separations. The prepared membranes show an enhanced CO2/N-2 selectivity of 78, a ca. 200% increase compared to pure PSf membranes. The performance of the membranes is significantly dependent on the operating parameters, and process design and optimization are crucial for industrial applications.
Article
Materials Science, Multidisciplinary
Fernando Ramos-Saz, Colin S. M. Kang, Maria Forsyth, Jennifer M. Pringle
Summary: An advancement in light gas separation performance is achieved by using organic ionic plastic crystal (OIPC)-based composites. The composite membrane shows tunable performance under different thermal conditions and improved CO2 solubility upon annealing. The thermophysical properties of the composite reveal a strong dependency between the structure and the overall gas separation performance. Additionally, the composite exhibits self-healing behavior, making it more attractive for practical applications.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Chemical
Peizhi Cao, Zhe Wang, Liying Liu, Peng Gao, Guo Tian, Haoran Liu, Jiaxin He
Summary: In this study, cobalt-silicon molecular sieves (CSMS) were synthesized using a hydrothermal method, and the effects of pH values on the synthesis were investigated. The results showed that CSMS-12, synthesized at pH = 12, exhibited the highest performance and could be used for the separation of CO2 in flue gas and biogas.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Green & Sustainable Science & Technology
I. Ahmad, H. Jee, S. H. Song, M. J. Kim, T. Eisa, J. K. Jang, K. -J. Chae, C. Y. Chuah, E. Yang
Summary: This study investigates the potential utility of 2D MXenes as nanofillers to enhance the gas separation performance of polydimethylsiloxane (PDMS) membrane. Mixed-matrix membranes were fabricated by incorporating multilayer MXene (ML-MXene) and single-layer MXene (D-MXene) into PDMS matrices, and the addition of MXene improved the separation capacity of the rubbery dense layers. The optimized D-MXene-loaded mixed-matrix membrane at 1 wt% loading demonstrated a 64.1% increase in CO2 permeability and a 21.3% increase in CO2/N2 selectivity compared to pure PDMS membrane.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Materials Science, Multidisciplinary
Samy Yousef, Simona Tuckute, Andrius Tonkonogovas, Arunas Stankevicius, Alaa Mohamed
Summary: The addition of carbon nanotubes in the dense layer of PES membranes enhances permeability and selectivity for gas separation, resulting in increased porosity and decreased pore size. The membranes show improved thermal stability and increased permeabilities for various gases, making them promising candidates for clean energy extraction applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Environmental Sciences
Bassem Fareed Felemban, Sadia Sagar Iqbal, Ali Bahadar, Nazia Hossain, Abdul Jabbar
Summary: In this study, PDMS incorporated with SWCNTs were fabricated via solution casting method and characterized by multiple analyses. The modified membranes were further analyzed for gas permeability. The even distribution of SWCNTs in PDMS improved thermal stability but weakened mechanical strength.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Saeed Ashtiani, Zdenek Sofer, Filip Prusa, Karel Friess
Summary: The unique CNT-ZIF-8-PDMS composite membranes with aligned ZIF-8 arrays on CNT surface act as an effective buffering layer for enhanced gas transport, showing outstanding gas separation performance with high permeabilities for CO2 and C3H6. The addition of thin PDMS layer improves mechanical and thermal stability of the composite, leading to a significant increase in elongation and a reduction in mass. The composite membranes exhibit great potential for targeted gas separation applications, surpassing the 2008 Robeson upper bounds for selectivities of various gas pairs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Cuihua Ma, Qinghua Li, Zhi Wang, Min Gao, Jixiao Wang, Xingzhong Cao
Summary: High-performance thin-film composite (TFC) membranes were prepared by interfacial polymerization, which exhibited remarkable improvement in gas separation performance due to the introduction of rigid and contorted structures.
JOURNAL OF MEMBRANE SCIENCE
(2022)
