Selective Extraction of Lactic Acid from Aqueous Media through a Hydrophobic H-Beta Zeolite/PVDF Mixed Matrix Membrane Contactor

2014 ◽  
Vol 53 (45) ◽  
pp. 17770-17781 ◽  
Author(s):  
M. Madhumala ◽  
D. Satyasri ◽  
T. Sankarshana ◽  
S. Sridhar
Keyword(s):  
Lactic Acid ◽  
Aqueous Media ◽  
Selective Extraction ◽  
Beta Zeolite ◽  
Mixed Matrix Membrane ◽  
Membrane Contactor ◽  
Mixed Matrix

NH2-MIL-125 filled mixed matrix membrane contactor with SO2 enrichment for flue gas desulphurization

2022 ◽  
Vol 428 ◽  
pp. 132595
Author(s):  
Xu Li ◽  
Yanli Zhang ◽  
Qingping Xin ◽  
Xiaoli Ding ◽  
Lizhi Zhao ◽  
...  
Keyword(s):  
Flue Gas ◽  
Mixed Matrix Membrane ◽  
Membrane Contactor ◽  
Mixed Matrix ◽  
Flue Gas Desulphurization

Mixed matrix membrane contactor containing core-shell hierarchical Cu@4A filler for efficient SO2 capture

2019 ◽  
Vol 376 ◽  
pp. 160-169 ◽  
Author(s):  
Lei Zhang ◽  
Qingping Xin ◽  
Liguo Lou ◽  
Xu Li ◽  
Leitao Zhang ◽  
...  
Keyword(s):  
Mixed Matrix Membrane ◽  
Core Shell ◽  
Membrane Contactor ◽  
Mixed Matrix ◽  
So2 Capture

Polyvinylidene fluoride hollow fiber mixed matrix membrane contactor incorporating modified ZSM-5 zeolite for carbon dioxide absorption

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 78865-78874 ◽  
Author(s):  
Afsaneh Shirzadeh-Gharacheh ◽  
Masoud Rahbari-Sisakht
Keyword(s):  
Carbon Dioxide ◽  
Hollow Fiber ◽  
Polyvinylidene Fluoride ◽  
Mixed Matrix Membrane ◽  
Membrane Contactor ◽  
Mixed Matrix ◽  
Carbon Dioxide Absorption

PVDF/ ZSM-5 hollow fiber mixed matrix membrane.

Aqueous One-Step Modulation for Synthesizing Monodispersed ZIF-8 Nanocrystals for Mixed-Matrix Membrane

2021 ◽  
Vol 13 (9) ◽  
pp. 11296-11305
Author(s):  
Xu Jiang ◽  
Shanshan He ◽  
Gang Han ◽  
Jun Long ◽  
Songwei Li ◽  
...  
Keyword(s):  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
One Step

Kinetics studies on free radical scavenging property of ceria in polysulfone–ceria radiation resistant mixed-matrix membrane

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Amita Bedar ◽  
Beena G. Singh ◽  
Pradip K. Tewari ◽  
Ramesh C. Bindal ◽  
Soumitra Kar
Keyword(s):  
Radical Scavenging ◽  
Radiation Environment ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Ceria Nanoparticles ◽  
Ros Scavenging ◽  
Mixed Matrix ◽  
Stable States ◽  
Host Matrix ◽  
Γ Radiation

Abstract Cerium oxide (ceria) contains two stable states of cerium ions (Ce3+ and Ce4+). The presence of these two states and the ability to swap from one state to another (Ce3+ ↔ Ce4+) by scavenging the highly reactive oxygen species (ROS) generated from radiolysis of water, ensure the enhanced stability of polysulfone (Psf) membranes in the γ-radiation environment. In this study, the ROS scavenging ability of ceria was studied. Ceria nanoparticles were found to scavenge ROS like hydroxyl radicals and hydrogen peroxide (H2O2). The H2O2 scavenging is due to the peroxidase-like catalytic activity of ceria nanoparticles. The ROS scavenging is responsible for offering protection to the Psf host matrix and in turn the stability to the Psf-ceria mixed-matrix membranes (MMMs) in γ-radiation environment. Thus, presence of ceria nanoparticles provides an opportunity for utilizing Psf-ceria MMMs in ionizing radiation environment with increased life span, without compromise in the performance.

scholarly journals Multiple Amine-Contained POSS-Functionalized Organosilica Membranes for Gas Separation

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 194
Author(s):  
Xiuxiu Ren ◽  
Masakoto Kanezashi ◽  
Meng Guo ◽  
Rong Xu ◽  
Jing Zhong ◽  
...  
Keyword(s):  
Gas Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Separation Performance ◽  
Hybrid Membranes ◽  
Mixed Matrix ◽  
Translation Model ◽  
Good Thermal Stability ◽  
Oligomeric Silsesquioxane

A new polyhedral oligomeric silsesquioxane (POSS) designed with eight –(CH2)3–NH–(CH2)2–NH2 groups (PNEN) at its apexes was used as nanocomposite uploading into 1,2-bis(triethoxysilyl)ethane (BTESE)-derived organosilica to prepare mixed matrix membranes (MMMs) for gas separation. The mixtures of BTESE-PNEN were uniform with particle size of around 31 nm, which is larger than that of pure BTESE sols. The characterization of thermogravimetric (TG) and gas permeance indicates good thermal stability. A similar amine-contained material of 3-aminopropyltriethoxysilane (APTES) was doped into BTESE to prepare hybrid membranes through a copolymerized strategy as comparison. The pore size of the BTESE-PNEN membrane evaluated through a modified gas-translation model was larger than that of the BTESE-APTES hybrid membrane at the same concentration of additions, which resulted in different separation performance. The low values of Ep(CO2)-Ep(N2) and Ep(N2) for the BTESE-PNEN membrane at a low concentration of PNEN were close to those of copolymerized BTESE-APTES-related hybrid membranes, which illustrates a potential CO2 separation performance by using a mixed matrix membrane strategy with multiple amine POSS as particles.

Efficient trace-scale extraction method of reactor produced 199Au adequate for nuclear medicine applications

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohamed F. Attallah ◽  
Ahmed M. Shahr El-Din ◽  
Mohamed A. Gizawy ◽  
Amal M. I. Ali
Keyword(s):  
Aqueous Media ◽  
Selective Extraction ◽  
Extraction Process ◽  
High Yield ◽  
High Recovery ◽  
Rapid Separation ◽  
Efficient Separation ◽  
Liquid Liquid Extraction ◽  
Cyanex 302 ◽  
Cyanex 923

Abstract Production of no carrier-added (NCA) 199Au through natPt(n, γ) reaction and subsequent purification using liquid-liquid extraction from other radioisotopes is studied in the context of theranostic application. Comparative separation of NCA 199Au after dissolution of activated Pt target using three Cyanex compounds (Cyanex-272, Cyanex-302 and Cyanex-923) is evaluated. The extraction process is optimized in terms of the type of extractant, the concentration of extractant, extraction time and aqueous media (HNO3, NH4OH). Among these extractants, the Cynaex-923 is efficient and promising for rapid separation and production of NCA 199Au from HNO3 by high extraction %. Selective extraction of 199Au from other Pt and Ir radioisotopes is observed. High recovery of 199Au was obtained in the case of Cyanex-923 using 0.05 M thiourea dissolved in HCl or 2 M NaOH. Our results find the Cyanex-923 as a promising extractant for efficient separation of 199Au from irradiated Pt target with high yield (99%).

scholarly journals The Effect of the Temperature and Moisture to the Permeation Properties of PEO-Based Membranes for Carbon-Dioxide Separation

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2053
Author(s):  
Dragutin Nedeljkovic
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Carbon Dioxide Emission ◽  
Combustion Products ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
Gas Treatment ◽  
Carbon Dioxide Separation ◽  
Different Temperatures

An increased demand for energy in recent decades has caused an increase in the emissions of combustion products, among which carbon-dioxide is the most harmful. As carbon-dioxide induces negative environmental effects, like global warming and the greenhouse effect, a decrease of the carbon-dioxide emission has emerged as one of the most urgent tasks in engineering. In this work, the possibility for the application of the polymer-based, dense, mixed matrix membranes for flue gas treatment was tested. The task was to test a potential decrease in the permeability and selectivity of a mixed-matrix membrane in the presence of moisture and at elevated temperature. Membranes are based on two different poly(ethylene oxide)-based polymers filled with two different zeolite powders (ITR and IWS). An additive of detergent type was added to improve the contact properties between the zeolite and polymer matrix. The measurements were performed at three different temperatures (30, 60, and 90 °C) under wet conditions, with partial pressure of the water equal to the vapor pressure of the water at the given temperature. The permeability of carbon-dioxide, hydrogen, nitrogen, and oxygen was measured, and the selectivity of the carbon-dioxide versus other gases was determined. Obtained results have shown that an increase of temperature and partial pressure of the vapor slightly increase both the selectivity and permeability of the synthesized membranes. It was also shown that the addition of the zeolite powder increases the permeability of carbon-dioxide while maintaining the selectivity, compared to hydrogen, oxygen, and nitrogen.

Preparation of Cu 3 ( BTC ) 2 / PVC mixed matrix membrane for pomegranate seed storage

2021 ◽  
Author(s):  
Yuanyue Wu ◽  
Zhen Wang ◽  
Liang Zhu ◽  
Kaijun Xiao ◽  
Yurong Yin ◽  
...  
Keyword(s):  
Seed Storage ◽  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
Pomegranate Seed
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