Pore-Space Partition and Optimization for Propane-Selective High-Performance Propane/Propylene Separation

2021 ◽  
Author(s):  
Anh N. Hong ◽  
Huajun Yang ◽  
Tong Li ◽  
Yong Wang ◽  
Yanxiang Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Pore Space ◽  
Space Partition

Pore Space Partition within a Metal–Organic Framework for Highly Efficient C2H2/CO2 Separation

2019 ◽  
Vol 141 (9) ◽  
pp. 4130-4136 ◽  
Author(s):  
Yingxiang Ye ◽  
Zhenlin Ma ◽  
Rui-Biao Lin ◽  
Rajamani Krishna ◽  
Wei Zhou ◽  
...  
Keyword(s):  
Pore Space ◽  
Metal Organic Framework ◽  
Co2 Separation ◽  
Space Partition ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

Functionalized metal organic frameworks for effective capture of radioactive organic iodides

2017 ◽  
Vol 201 ◽  
pp. 47-61 ◽  
Author(s):  
Baiyan Li ◽  
Xinglong Dong ◽  
Hao Wang ◽  
Dingxuan Ma ◽  
Kui Tan ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
High Performance ◽  
Noble Metals ◽  
Waste Treatment ◽  
Pore Space ◽  
Uptake Capacity ◽  
New Strategy ◽  
Metal Organic ◽  
And Performance ◽  
Ir Spectroscopic

Highly efficient capture of radioactive organic iodides (ROIs) from off-gas mixtures remains a substantial challenge for nuclear waste treatment. Current materials utilized for ROI sequestration suffer from low capacity, high cost (e.g. use of noble metals), and poor recyclability. Recently, we have developed a new strategy to tackle this challenge by functionalizing MOF materials with tertiary amines to create molecular traps for the effective capture and removal of ROIs (e.g. radioactive methyl iodide) from nuclear wastes. To further enhance the uptake capacity and performance of CH3I capture by ROI molecular traps, herein, we carry out a systematic study to investigate the effect of different amine molecules on ROI capture. The results demonstrate a record-high CH3I saturation uptake capacity of 80% for MIL-101–Cr–DMEDA at 150 °C, which is 5.3 times that of Ag0@MOR (15 wt%), a leading adsorbent material for capturing ROIs during nuclear fuel reprocessing. Furthermore, the CH3I decontamination factors (DFs) for MIL-101–Cr–DMEDA are as high as 5000 under simulated reprocessing conditions, largely exceeding that of facility regulatory requirements (DF = 3000). In addition, MIL-101–Cr–DMEDA can be recycled without loss of capacity, illustrating yet another advantage compared to known industrial adsorbents, which are typically of a “single-use” nature. Our analysis also shows that both physisorption and chemisorption of CH3I occur at the three amine-grafted MOFs. While chemisorption takes place at the amine functionalized sites, the amount of physisorption correlates with the MOF porosity. A possible binding site of amine–CH3I interaction has been identified via an in situ IR spectroscopic study. The results suggest that CH3I interacts strongly and directly with the tertiary nitrogen of the amine molecules. The CH3I uptake amount decreases as the amine chain length increases, in trend with the decreasing pore space of the corresponding framework. The strategy to build MOF-based molecular traps developed in this work not only leads to a new record-high performance for ROI capture, but also offers an effective way of systematically tuning the porosity by varying the length of functionalized amine molecules. This study also demonstrates that MOFs represent a promising new platform for selective capture and removal of radioactive nuclear waste.

Multi-Dimensional Modeling of Lithium-Air Batteries

2013 ◽  
Author(s):  
Yun Wang ◽  
Sung Chan Cho
Keyword(s):  
High Performance ◽  
Electrochemical Reaction ◽  
High Current Density ◽  
Pore Space ◽  
Uniform Distributions ◽  
Dimensional Modeling ◽  
Voltage Loss ◽  
Air Battery ◽  
Electrode Passivation ◽  
Lithium Air Batteries

In this study, we develop a multi-dimensional model of lithium-air (Li-air) batteries to evaluate their performance. The model consists of a set of partial differential equations of species and charges conservation, in conjunction of the electrochemical reaction kinetics at the reaction interface, and takes into account two major mechanisms of voltage loss due to insoluble discharge products formation: namely, electrode passivation and increased oxygen transport resistance. The model is successfully implemented to numerical simulation of discharging operation of a two-dimensional Li-air battery. Highly non-uniform distributions of oxygen and insoluble products are revealed under high current density. The pore space in the electrode is not fully utilized, particularly under high discharging current operation. The fundamental model and numerical tool are important for developing high-performance Li-air batteries.

Integrating the Pillared-Layer Strategy and Pore-Space Partition Method to Construct Multicomponent MOFs for C2H2/CO2 Separation

2020 ◽  
Vol 142 (20) ◽  
pp. 9258-9266 ◽  
Author(s):  
Lizhen Liu ◽  
Zizhu Yao ◽  
Yingxiang Ye ◽  
Yike Yang ◽  
Quanjie Lin ◽  
...  
Keyword(s):  
Pore Space ◽  
Co2 Separation ◽  
Space Partition ◽  
Partition Method

Host–Guest Pore Space Partition in a Boron Imidazolate Framework for Ethylene Separation

2021 ◽  
Author(s):  
Qinlong Hong ◽  
Wenjing Wang ◽  
Shumei Chen ◽  
Ke Chen ◽  
Meng Liu ◽  
...  
Keyword(s):  
Pore Space ◽  
Space Partition

Pore space partition via secondary metal ions entrapped by pyrimidine hooks: influences on structural flexibility and carbon dioxide capture

2017 ◽  
Vol 5 (33) ◽  
pp. 17287-17292 ◽  
Author(s):  
Zhiyong Lu ◽  
Jianfeng Zhang ◽  
Jingui Duan ◽  
Liting Du ◽  
Cheng Hang
Keyword(s):  
Carbon Dioxide ◽  
Metal Ions ◽  
Carbon Dioxide Capture ◽  
Pore Space ◽  
Structural Flexibility ◽  
Space Partition

A new way of pore space partitionviasecondary metal ions entrapped by pyrimidine hooks is implemented on flexible MOFs.

Multivariable Modular Design of Pore Space Partition

2016 ◽  
Vol 138 (46) ◽  
pp. 15102-15105 ◽  
Author(s):  
Xiang Zhao ◽  
Xianhui Bu ◽  
Edward T. Nguyen ◽  
Quan-Guo Zhai ◽  
Chengyu Mao ◽  
...  
Keyword(s):  
Modular Design ◽  
Pore Space ◽  
Space Partition

Influence of Morphology on Flow Law Characteristics in Open-Cell Foams: An Overview of Usual Approaches and Correlations

2017 ◽  
Vol 139 (7) ◽  
Author(s):  
Prashant Kumar ◽  
Frédéric Topin
Keyword(s):  
High Performance ◽  
Pore Space ◽  
Cross Sectional ◽  
Open Cell ◽  
Industrial Systems ◽  
Wide Range ◽  
Open Cell Foam ◽  
Successful Design ◽  
Open Cell Foams ◽  
Flow Law

Foam structures have been a subject of intensive research since the last decade. The pore space in open-cell foam is interconnected, forming perforated channels of varying cross-sectional areas where fluid can flow. Knowledge of pressure drop induced by these foam matrices is essential for successful design and operation of high-performance industrial systems. In this context, analytical correlations were derived for the determination of Darcian permeability (KD) and Forchheimer inertia coefficient (CFor) in open-cell foams of different strut shapes. It has been shown that the flow law characteristics are strongly dependent on strut shape, strut characteristic dimension, and length. The applicability of new correlations was examined by comparing and validating the numerical and experimental flow law characteristics data against the predicted ones. An excellent agreement has been observed for the foam structures of different materials and variable texture in a wide range of porosity and Reynolds number.

Pore Space Partition and Charge Separation in Cage-within-Cage Indium−Organic Frameworks with High CO2Uptake

2010 ◽  
Vol 132 (48) ◽  
pp. 17062-17064 ◽  
Author(s):  
Shou-Tian Zheng ◽  
Julia T. Bu ◽  
Yufei Li ◽  
Tao Wu ◽  
Fan Zuo ◽  
...  
Keyword(s):  
Charge Separation ◽  
Pore Space ◽  
Space Partition
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