Acid/hydrazide-appended covalent triazine frameworks for low-pressure CO2 capture: pre-designable or post-synthesis modification

2017 ◽  
Vol 5 (40) ◽  
pp. 21266-21274 ◽  
Author(s):  
Yu Fu ◽  
Zhiqiang Wang ◽  
Xianbiao Fu ◽  
Jun Yan ◽  
Cheng Liu ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Surface Engineering ◽  
Acid Hydrazide ◽  
Low Pressure ◽  
Pore Surface ◽  
Organic Polymers ◽  
Post Synthesis ◽  
Critical Challenge

Pore surface engineering in nanoporous organic polymers (NOPs) targeted for their different applications remains a critical challenge.

Azo-functionalized microporous organic polymers: synthesis and applications in CO2 capture and conversion

2015 ◽  
Vol 51 (58) ◽  
pp. 11576-11579 ◽  
Author(s):  
Zhenzhen Yang ◽  
Hongye Zhang ◽  
Bo Yu ◽  
Yanfei Zhao ◽  
Zhishuang Ma ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Low Pressure ◽  
Organic Polymers ◽  
Mild Conditions ◽  
Microporous Organic Polymers

Azo-functionalized microporous organic polymers were synthesized under mild conditions (25 °C, 1 h, yield: >95%), and displayed high CO2 capacity and high performances for catalyzing the methylation of amines with CO2 under low pressure (0.5 MPa).

Microporous organic polymers involving thiadiazolopyridine for high and selective uptake of greenhouse gases at low pressure

2017 ◽  
Vol 53 (76) ◽  
pp. 10576-10579 ◽  
Author(s):  
MD. Waseem Hussain ◽  
Sujoy Bandyopadhyay ◽  
Abhijit Patra
Keyword(s):  
Greenhouse Gases ◽  
Low Pressure ◽  
High Uptake ◽  
Organic Polymers ◽  
Selective Uptake ◽  
Microporous Organic Polymers

Thiadiazolopyridine-based microporous organic polymers were shown to exhibit a remarkably high uptake of CO2 of 5.8 mmol g−1 at 273 K and 1 bar.

Large Cryogenic Storage of Hydrogen in Carbon Nanotubes at Low Pressures

2001 ◽  
Vol 706 ◽  
Author(s):  
B. K. Pradhan ◽  
A. Harutyunyan ◽  
D. Stojkovic ◽  
P. Zhang ◽  
M. W. Cole ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Zero Point ◽  
Isosteric Heat ◽  
Low Pressure ◽  
Quantum Mechanical ◽  
Strong Adsorption ◽  
Point Motion ◽  
Post Synthesis ◽  
Walled Carbon Nanotubes ◽  
Low Pressures

AbstractWe report (6 wt %) storage of H2 at T=77 K in processed bundles of single-walled carbon nanotubes at P=2 atmospheres. The hydrogen storage isotherms are completely reversible. D2 isotherms confirm this anomalous low-pressure adsorption and further reveal the effects of quantum mechanical zero point motion. We propose that our post-synthesis treatment of the sample not only improves access for hydrogen to the central pores within individual nanotubes, but also may create a roughened tube surface with an enhanced binding energy for hydrogen. Such an enhancement is needed to understand the strong adsorption at low pressure. We obtain an experimental isosteric heat qst=125 ± 5 meV for processed SWNT materials.

Optimizing bromide anchors for easy tethering of amines, nitriles and thiols in porous organic polymers towards enhanced CO2 capture

2021 ◽  
pp. 111450
Author(s):  
Vepa Rozyyev ◽  
Mustafa S. Yavuz ◽  
Damien Thirion ◽  
Thien S. Nguyen ◽  
Thi Phuong Nga Nguyen ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Organic Polymers ◽  
Porous Organic Polymers

Postcombustion CO2 Capture for Combined Cycles Utilizing Hot-Water Absorbent Regeneration

2011 ◽  
Vol 134 (1) ◽  
Author(s):  
Klas Jonshagen ◽  
Majed Sammak ◽  
Magnus Genrup
Keyword(s):  
Power Plant ◽  
Temperature Difference ◽  
Co2 Capture ◽  
Steam Pressure ◽  
Low Pressure ◽  
Pressure Level ◽  
Combined Cycle ◽  
Hot Water ◽  
Combined Cycle Power Plant ◽  
Pressure Plant

The partly hot-water driven CO2 capture plant offers a significant potential for improvement in performance when implemented in a combined-cycle power plant (CCPP). It is possible to achieve the same performance with a dual-pressure steam cycle as in a triple-pressure unit. Even a single-pressure plant can attain an efficiency competitive with that achievable with a triple-pressure plant without the hot-water reboiler. The underlying reasons are better heat utilization in the heat recovery unit and less steam extraction to the absorbent regenerating unit(s). In this paper, the design criteria for a combined cycle power plant utilizing hot-water absorbent regeneration will be examined and presented. The results show that the most suitable plant is one with two steam pressure levels. The low-pressure level should be much higher than in a conventional combined cycle in order to increase the amount of heat available in the economizer. The external heat required in the CO2 capture plant is partly supplied by the economizer, allowing temperature optimization in the unit. The maximum value of the low-pressure level is determined by the reboiler, as too great a temperature difference is unfavorable. This work evaluates the benefits of coupling the economizer and the reboiler in a specially designed CCPP. In the CO2 separation plant both monoethanolamine (MEA) and ammonia are evaluated as absorbents. Higher regeneration temperatures can be tolerated in ammonia-based plants than in MEA-based plants. When using a liquid heat carrier the reboiler temperature is not constant on the hot side, which results in greater temperature differences. The temperature difference can be greatly reduced by dividing the regeneration process into two units operating at different pressures. The possibility of extracting more energy from the economizer to replace part of the extracted steam increases the plant efficiency. The results show that very high efficiencies can be achieved without using multiple pressure-levels.

Amino-Functionalized Porphyrin-Based Porous Organic Polymers for CO2 Capture and Hg2+ Removal

2020 ◽  
Vol 34 (8) ◽  
pp. 9771-9778 ◽  
Author(s):  
Guo Jiangfei ◽  
Wang Lizhi ◽  
Du Zhang ◽  
Jianhan Huang
Keyword(s):  
Co2 Capture ◽  
Organic Polymers ◽  
Porous Organic Polymers

Building metal-functionalized porous carbons from microporous organic polymers for CO2 capture and conversion under ambient conditions

2019 ◽  
Vol 9 (16) ◽  
pp. 4422-4428 ◽  
Author(s):  
Shuai Gu ◽  
Wenguang Yu ◽  
Jingjing Chen ◽  
He Zhang ◽  
Yan Wang ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Organic Polymers ◽  
Porous Carbons ◽  
Ambient Conditions ◽  
Microporous Organic Polymers ◽  
Physical And Chemical ◽  
And Chemical Properties

Metal-functionalized porous carbons derived from microporous organic polymers remain highly desired for their intriguing physical and chemical properties.

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