Ethanol separation by selective adsorption of water

1993 ◽  
Vol 8 (5-6) ◽  
pp. 279-282 ◽  
Author(s):  
S. K. Rakshit ◽  
P. Ghosh ◽  
V. S. Bisaria
Keyword(s):  
Selective Adsorption ◽  
Adsorption Of Water ◽  
Ethanol Separation

scholarly journals Optimization of Mordenite Membranes Using Sucrose Precursor for Pervaporation of Water-Ethanol Mixtures

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 160
Author(s):  
Abdulaziz A. Alomair ◽  
Yousef Alqaheem
Keyword(s):  
Pyrolysis Temperature ◽  
Operating Temperature ◽  
Selective Adsorption ◽  
Sucrose Concentration ◽  
Low Cost ◽  
Water Flux ◽  
Separation Performance ◽  
Carbon Membranes ◽  
Adsorption Of Water ◽  
High Separation

Post-treated mordenite membranes were prepared using sucrose (C12H22O11) as a carbon precursor to block any pinholes and defects in the zeolite layer. The pervaporation (PV) process was used to separate ethanol from the water. The effects of the sucrose concentration and the pyrolysis temperature (650–850 °C) were investigated, and the resulting high separation performance compared to those post/pre-treated membranes was reported in the literature. In this study, mordenite carbon membranes yielded a water/ethanol separation factor of 990.37 at a water flux of 9.10 g/m2h. The influence of the operating temperature on the performance of the membrane also was considered. It was concluded that the selective adsorption of water through zeolite pores was achieved. The entire preparation procedure was achieved using a rapid, low-cost preparation process.

scholarly journals Synthesis of a magnetic C@Co material via the design of a MOF precursor for efficient and selective adsorption of water pollutants

2021 ◽  
Author(s):  
Yu Liu ◽  
Yan Wang ◽  
Xiao-Sa Zhang ◽  
Wen-Ze Li ◽  
Ai-Ai Yang ◽  
...  
Keyword(s):  
Active Sites ◽  
Organic Dyes ◽  
Selective Adsorption ◽  
Catalytic Performance ◽  
Adsorption Processes ◽  
Carbon Coated ◽  
Adsorption Of Water ◽  
Metal Organic ◽  
Cobalt Nanoparticle ◽  
Fast Acting

Abstract 3D metal-organic frameworks (MOFs) can be appropriate templates for the fabrication of nanomaterials due to they have active sites exposed on the channel or surface, which thus provide them with improved catalytic performance. In this study, a 3D cobalt-based MOF [Co(H2bpta)]n (Co-MOF), where H4bpta denotes 2,2′,4,4′-biphenyltetracarboxylic acid, has been constructed with the use of a ligand with a high carbon content. On this basis, a 2D magnetic carbon-coated cobalt nanoparticle composite (C@Co) was prepared by using the title MOF. Magnetic C@Co can readily absorb dye from the solution and can thus act as an inexpensive and fast-acting adsorbent. Moreover, we have explored the adsorption isotherms, kinetics and thermodynamics of the anion dyes in detail. The adsorption capacity of the C@Co for investigated methyl orange (MO) and congo red (CR) dyes were 773.48 and 495.66 mg g− 1, respectively. It is noteworthy that MO adsorption is higher in existing materials. Thermodynamic studies suggest that the adsorption processes are spontaneous and exothermic. This study opens a new insight into the synthesis and application of carbon-based materials that enable the selective removal of organic dyes.

MOFs containing a linear bis-pyridyl-tris-amide and angular carboxylates: exploration of proton conductivity, water vapor and dye sorptions

2019 ◽  
Vol 6 (1) ◽  
pp. 184-191 ◽  
Author(s):  
Satyanarayana K. Konavarapu ◽  
Anindita Goswami ◽  
Anaparthi Ganesh Kumar ◽  
Susanta Banerjee ◽  
Kumar Biradha
Keyword(s):  
Methylene Blue ◽  
Water Vapor ◽  
Proton Conductivity ◽  
Crystal Violet ◽  
Selective Adsorption ◽  
Cationic Dyes ◽  
Adsorption Of Water ◽  
Conductivity Water ◽  
Adsorption Of Water Vapor

Four new MOFs were shown to have appreciable proton conductivities, selective adsorption of water vapor over nitrogen and a tendency to selectively adsorb cationic dyes such as methylene blue and crystal violet.

Selective adsorption of water on amorphous ferric oxide hydroxide

Langmuir ◽  
1991 ◽  
Vol 7 (10) ◽  
pp. 2213-2218 ◽  
Author(s):  
Kazuhiko. Kandori ◽  
Tatsuo. Ishikawa
Keyword(s):  
Ferric Oxide ◽  
Selective Adsorption ◽  
Oxide Hydroxide ◽  
Adsorption Of Water

3D Porous Metal−Organic Framework Exhibiting Selective Adsorption of Water over Organic Solvents

2007 ◽  
Vol 46 (15) ◽  
pp. 5835-5837 ◽  
Author(s):  
Jin-Zhong Gu ◽  
Wen-Guan Lu ◽  
Long Jiang ◽  
Hong-Cai Zhou ◽  
Tong-Bu Lu
Keyword(s):  
Organic Solvents ◽  
Selective Adsorption ◽  
Metal Organic Framework ◽  
Porous Metal ◽  
Adsorption Of Water ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Elucidating the Aromatic Properties of Covalent Organic Frameworks Surface for Enhanced Polar Solvent Adsorption

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1861
Author(s):  
Mostafa Yousefzadeh Borzehandani ◽  
Emilia Abdulmalek ◽  
Mohd Basyaruddin Abdul Rahman ◽  
Muhammad Alif Mohammad Latif
Keyword(s):  
Electrostatic Interactions ◽  
Selective Adsorption ◽  
Van Der Waals Interactions ◽  
Covalent Organic Frameworks ◽  
Aromatic Character ◽  
Good Surface ◽  
Phenyl Rings ◽  
Adsorption Of Water ◽  
Dynamics Simulations ◽  
Solvent Adsorption

Covalent organic frameworks (COFs) have a distinguished surface as they are mostly made by boron, carbon, nitrogen and oxygen. Many applications of COFs rely on polarity, size, charge, stability and hydrophobicity/hydrophilicity of their surface. In this study, two frequently used COFs sheets, COF-1 and covalent triazine-based frameworks (CTF-1), are studied. In addition, a theoretical porous graphene (TPG) was included for comparison purposes. The three solid sheets were investigated for aromaticity and stability using quantum mechanics calculations and their ability for water and ethanol adsorption using molecular dynamics simulations. COF-1 demonstrated the poorest aromatic character due to the highest energy delocalization interaction between B–O bonding orbital of sigma type and unfilled valence-shell nonbonding of boron. CTF-1 was identified as the least kinetically stable and the most chemically reactive. Both COF-1 and CTF-1 showed good surface properties for selective adsorption of water via hydrogen bonding and electrostatic interactions. Among the three sheets, TPG’s surface was mostly affected by aromatic currents and localized π electrons on the phenyl rings which in turn made it the best platform for selective adsorption of ethanol via van der Waals interactions. These results can serve as guidelines for future studies on solvent adsorption for COFs materials.

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