Light isotope separation in carbon nanotubes through quantum molecular sieving

2001 ◽  
Vol 63 (24) ◽  
Author(s):  
Sivakumar R. Challa ◽  
David S. Sholl ◽  
J. Karl Johnson
Keyword(s):  
Carbon Nanotubes ◽  
Isotope Separation ◽  
Light Isotope ◽  
Molecular Sieving

Highly permeable carbon nanotubes/polyamide layered membranes for molecular sieving

2021 ◽  
pp. 130684
Author(s):  
Li-Ye Chen ◽  
Meng-Ying Jiang ◽  
Qian Zou ◽  
Si-Wei Xiong ◽  
Ze-gang Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Sieving

Molecular Sieving Using Single Wall Carbon Nanotubes

Nano Letters ◽  
2007 ◽  
Vol 7 (3) ◽  
pp. 565-569 ◽  
Author(s):  
Gaurav Arora ◽  
Stanley I. Sandler
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Molecular Sieving

Isotope Thermotransport in Liquid Potassium, Rubidium, and Gallium

1966 ◽  
Vol 21 (9) ◽  
pp. 1344-1347 ◽  
Author(s):  
A. Lodding ◽  
A. Ott
Keyword(s):  
Theoretical Model ◽  
Liquid Metal ◽  
Free Volume ◽  
Thermal Diffusion ◽  
Isotope Separation ◽  
Light Isotope ◽  
Statistical Fluctuations ◽  
Temperature Ranges ◽  
The Mean ◽  
Effective Cluster

Temperature differences ranging from 100°C to 500°C were maintained between the top and bottom ends of vertical capillaries containing liquid metal. The light isotope was found to be enriched at the hot end. The steady-sate isotope separation for different temperature ranges were between 1 and 3 per cent, corresponding to the thermal diffusion factors αK=3.1×10-2, αRb=3.1 × 10-2 and αGa=3.8 × 10 -2. According to a theoretical model, the results imply that the diffusing species is a “cluster” of several cooperating atoms, the mean diffusive displacement of which is considerably less than the effective cluster diameter. The clusters drift into voids given by the statistical fluctuations of free volume.

Reassessing molecular sieving by kinked carbon nanotubes

2011 ◽  
Vol 19 (8) ◽  
pp. 085009 ◽  
Author(s):  
Zhongqiang Zhang ◽  
Hongwu Zhang ◽  
Lei Wang ◽  
Jianning Ding ◽  
Jinbao Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Sieving

Controllable deformation of salt water-filled carbon nanotubes using an electric field with application to molecular sieving

2016 ◽  
Vol 27 (31) ◽  
pp. 315702 ◽  
Author(s):  
Hongfei Ye ◽  
Yonggang Zheng ◽  
Zhongqiang Zhang ◽  
Hongwu Zhang ◽  
Zhen Chen
Keyword(s):  
Carbon Nanotubes ◽  
Electric Field ◽  
Salt Water ◽  
Controllable Deformation ◽  
Molecular Sieving

Effect of humic acid on the sulfamethazine adsorption by functionalized multi-walled carbon nanotubes in aqueous solution: mechanistic study

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 15184-15191 ◽  
Author(s):  
Quanquan Yang ◽  
Xiaogang Li ◽  
Guangcai Chen ◽  
Jianfeng Zhang ◽  
Baoshan Xing
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Humic Acid ◽  
Competitive Interactions ◽  
Mechanistic Study ◽  
Solution Ph ◽  
Pore Blockage ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Molecular Sieving

The presence of humic acid (HA) inhibited sulfamethazine (SMZ) adsorption by three types of multi-walled carbon nanotubesviacompetitive interactions, molecular sieving, and pore blockage in solution (pH < 9).

scholarly journals Two-Effects-in-One: Kinetic Quantum and Molecular Sieving Effect in a Robust-Flexible [Th6Co2] Cage for both Isotope and Isomer Separation

2020 ◽  
Author(s):  
Mengjia Yin ◽  
Rajamani Krishna ◽  
Wenjing Wang ◽  
Daqiang Yuan ◽  
Yaling Fan ◽  
...  
Keyword(s):  
Chemical Stability ◽  
Hydrogen Isotope ◽  
Thermal Water ◽  
Guest Molecule ◽  
Isotope Separation ◽  
Isomer Separation ◽  
Molecular Sieving ◽  
Fundamental Design ◽  
Sieving Effect

Abstract Although molecular and quantum sieving (MS and QS) effects have been realized and employed to execute separation tasks, however, little is known about the coexistence of both effects in a compound and its corresponding structure. In this work, we show the first observation of coexistence of both quantum and molecular sieving effects in a [Th6Co2] cage-based compound (Th-Co-Cage-1). The [Th6Co2] cage shows 0.78 nm aperture but with an irregular crescent-like window. This allows [Th6Co2] cage to give ultrahigh uptake for hydrogen isotope and selectivity towards D2 over H2, leading to complete hydrogen isotope separation, as evidenced by experimental breakthrough test. When the size of guest molecule is more than the crescent-like window, a highly rare robust-flexible adsorption was observed, consequently leading to complete isomer separation for C4 and C6 isomers through molecular sieving effect. High thermal, water and chemical stability further supports the materials for practical separation application. The results open up a gate of material with coexistence of QS and MS effects and its fundamental design for superior separation application.

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