scholarly journals Influence of Casting Solvents on CO2/CH4 Separation Using Polysulfone Membranes

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 286
Author(s):  
Roba M. Almuhtaseb ◽  
Ahmed Awadallah-F ◽  
Shaheen A. Al-Muhtaseb ◽  
Majeda Khraisheh
Keyword(s):  
High Efficiency ◽  
In Situ Synthesis ◽  
Separation Process ◽  
Polymeric Membranes ◽  
Gas Mixture ◽  
Manufacturing Cost ◽  
Binary Gas Mixture ◽  
Maximum Permeability ◽  
Polysulfone Membranes

Polysulfone membranes exhibit resistance to high temperature with low manufacturing cost and high efficiency in the separation process. The composition of gases is an important step that estimates the efficiency of separation in membranes. As membrane types are currently becoming in demand for CO2/CH4 segregation, polysulfone will be an advantageous alternative to have in further studies. Therefore, research is undertaken in this study to evaluate two solvents: chloroform (CF) and tetrahydrofuran (THF). These solvents are tested for casting polymeric membranes from polysulfone (PSF) to separate every single component from a binary gas mixture of CO2/CH4. In addition, the effect of gas pressure was conducted from 1 to 10 bar on the behavior of the permeability and selectivity. The results refer to the fact that the maximum permeability of CO2 and CH4 for THF is 62.32 and 2.06 barrer at 1 and 2 bars, respectively. Further, the maximum permeability of CF is 57.59 and 2.12 barrer at 1 and 2 bars, respectively. The outcome selectivity values are 48 and 36 for THF and CF at 1 bar, accordingly. Furthermore, the study declares that with the increase in pressure, the permeability and selectivity values drop for CF and THF. The performance for polysulfone (PSF) membrane that is manufactured with THF is superior to that of CF relative to the Robeson upper bound. Therefore, through the results, it can be deduced that the solvent during in-situ synthesis has a significant influence on the gas separation of a binary mixture of CO2/CH4.

scholarly journals In situ synthesis of MoS2/graphene nanosheets as free-standing and flexible electrode paper for high-efficiency hydrogen evolution reaction

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10698-10705 ◽  
Author(s):  
Xianghui Zhang ◽  
Mingguang Zhang ◽  
Yiqun Tian ◽  
Jing You ◽  
Congxing Yang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Efficiency ◽  
Graphene Nanosheets ◽  
In Situ Synthesis ◽  
Solvothermal Process ◽  
Free Standing ◽  
Flexible Electrode ◽  
One Step

An improved flexible hybrid MoS2/graphene free-standing electrocatalyst paper was fabricated by a one-step in situ solvothermal process for hydrogen evolution reaction applications.

In situ synthesis of Prussian blue nanoparticles within a biocompatible reverse micellar system for in vivo Cs+uptake

2017 ◽  
Vol 41 (8) ◽  
pp. 2887-2890 ◽  
Author(s):  
Cyril Lavaud ◽  
Marilyn Kajdan ◽  
Elsa Compte ◽  
Jean-Claude Maurel ◽  
Joséphine Lai Kee Him ◽  
...  
Keyword(s):  
Prussian Blue ◽  
High Efficiency ◽  
In Situ Synthesis ◽  
Dose Effect ◽  
Micellar System ◽  
Prussian Blue Nanoparticles ◽  
Reverse Micellar System ◽  
Reverse Micellar

A Prussian blue reverse micellar system forin vivoCs+uptake exhibiting high efficiency and a significant dose effect.

In-Situ Synthesis and High-Efficiency Photocatalytic Performance of Cu(I)/Cu(II) Inorganic Coordination Polymer Quantum Sheets

2018 ◽  
Vol 57 (21) ◽  
pp. 13289-13295 ◽  
Author(s):  
Shixiong Li ◽  
Zhentao Feng ◽  
Yun Hu ◽  
Chaohai Wei ◽  
Haizhen Wu ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Photocatalytic Performance ◽  
High Efficiency ◽  
In Situ Synthesis

In situ synthesis of high-efficiency CsPbBr3/CsPb2Br5 composite nanocrystals in aqueous solution of microemulsion

2020 ◽  
Vol 22 (16) ◽  
pp. 5257-5261
Author(s):  
Sunqi Lou ◽  
Zhi Zhou ◽  
Weijiang Gan ◽  
Tongtong Xuan ◽  
Zhen Bao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
High Efficiency ◽  
In Situ Synthesis ◽  
Microemulsion Method

An innovative microemulsion method was reported for the preparation of CsPbBr3/CsPb2Br5 composite NCs in water.

scholarly journals High Retention and Purification of Bromelain Enzyme (Ananas comosus L. Merrill) from Pineapple Juice Using Plain and Hollow Polymeric Membranes Techniques

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 264
Author(s):  
Felix M. Carbajal Gamarra ◽  
José C. C. Santana ◽  
Segundo A. V. Llanos ◽  
Jorge A. Heredia Pérez ◽  
Fábio Richard Flausino ◽  
...  
Keyword(s):  
Human Health ◽  
High Efficiency ◽  
Membrane Separation ◽  
Separation Process ◽  
Polymeric Membranes ◽  
Operating Conditions ◽  
Ananas Comosus ◽  
Pineapple Juice ◽  
The World ◽  
Pineapple Fruit

The demand for bromelian and pineapple fruit has been increasing substantially in the world because of their benefits for the human health and use in diverse areas. In this context, this work aimed to study the capacity of higher retention (concentration); bromelain activity underwent ultrafiltration from pineapple juice (Ananas comusus L. Merrill). All assays were carried out at pH 7.0 and 7.5, and at 0.05 and 0.40 bar of transmembrane pressures. Results have shown that at the best operating conditions, between 85 and 87% of bromelain activity was recovered using the plain membrane separation process at 0.05 bar. The ultrafiltration has shown the capacity to retain 100% of proteolytic activity of the bromelain extracted. The samples have kept the same physics properties after ultrafiltration, and the result was verified via electrophoresis. The bromelain enzyme obtained was characterized, and pH 7 and between 30 and 40 °C were the best conditions. Therefore, this work shows that the use of both polymeric membranes has shown high efficiency, and can be used in the purification of bromelain enzymes.

scholarly journals Enhancement of chlorine on Pd catalyst for H2O2 in-situ synthesis in electro-Fenton system: Kinetics and Mechanism

2021 ◽  
Author(s):  
Linhui Lu ◽  
Qingli Shu ◽  
Guiru Zhang ◽  
Qi Zhang ◽  
Ping Du ◽  
...  
Keyword(s):  
High Efficiency ◽  
Phenol Degradation ◽  
In Situ Synthesis ◽  
Main Reaction ◽  
Side Reactions ◽  
Impregnation Method ◽  
Fenton Process ◽  
Excellent Activity ◽  
Plausible Mechanism

Palladium-based catalyst has been widely employed in electro-Fenton process for in-situ generation of H2O2. However, the selectivity to H2O2 achieved so far is still far below application level. In this work, a series of Cl-FePd/γ-Al2O3/Al catalysts were prepared by a three-step-impregnation method, exhibiting excellent activity in H2O2 in-situ synthesis and high efficiency in phenol degradation. The characterization results showed that the Cl could assist in increasing the content of Pd0 and reducing the isoelectric point of catalyst, leading to the dramatic promotion in synthesis of H2O2. Moreover, theoretical calculation and kinetics further demonstrated that the Cl doping could facilitate the main reaction in H2O2 synthesis, as well as inhibit side reactions, including the dissociation of O-O bond, hydrogenation and decomposition. Furthermore, plausible mechanism and degradation pathways were elaborated based on ESR and GC-MS results. These findings illustrate the value of palladium-based Cl-FePd/γ-Al2O3/Al catalyst in its application in electro-Fenton process.

In-situ synthesis of SiO2@MOF composites for high-efficiency removal of aniline from aqueous solution

2016 ◽  
Vol 390 ◽  
pp. 506-512 ◽  
Author(s):  
Tongtong Han ◽  
Caifeng Li ◽  
Xiangyu Guo ◽  
Hongliang Huang ◽  
Dahuan Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
High Efficiency ◽  
In Situ Synthesis
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