Ultrahigh CO2 adsorption capacity on carbon molecular sieves at room temperature

2011 ◽  
Vol 47 (24) ◽  
pp. 6840 ◽  
Author(s):  
Joaquín Silvestre-Albero ◽  
Anass Wahby ◽  
Antonio Sepúlveda-Escribano ◽  
Manuel Martínez-Escandell ◽  
Katsumi Kaneko ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Molecular Sieves ◽  
Room Temperature ◽  
Co2 Adsorption ◽  
Carbon Molecular Sieves ◽  
Co2 Adsorption Capacity

scholarly journals Molecular sieve supported ionic liquids as efficient adsorbent for CO2 capture

2015 ◽  
Vol 80 (2) ◽  
pp. 265-275 ◽  
Author(s):  
Na Yang ◽  
Rui Wang
Keyword(s):  
Ionic Liquids ◽  
Adsorption Capacity ◽  
Molecular Sieves ◽  
Co2 Adsorption ◽  
Ft Ir ◽  
Loading Amount ◽  
Vacuum Heating ◽  
Co2 Adsorption Capacity ◽  
Supported Ionic Liquids

[NH3e-mim][BF4], [OHe-mim][BF4] and [HOEAm] were selected and supported onto molecular sieves NaY, USY, SAPO-34 and MCM-41, to prepare supported ionic liquids. It was found that [NH3e-mim][BF4]/NaY has excellent CO2 adsorption performance, with adsorption capacity of 0.108 mmolCO2/g. This paper investigates the optimal adsorption conditions and recyclability of [NH3e-mim][BF4]/NaY. The results show that [NH3e-mim][BF4]/NaY has good CO2 adsorption under the condition of 20?C and 20% ILs loading amount. By vacuum heating, CO2 adsorption capacity reaches 0.451mmolCO2/g at fifth runs and reduces to 0.29mmolCO2/g at tenth runs. The structure and characterization of the [NH3e-mim][BF4]/NaY was examined by FT-IR, XRD, SEM and TG-DSC. TG-DSC also shows that it has good thermostability below 50?C.

scholarly journals Optimized Preparation of Nanosized Hollow SSZ-13 Molecular Sieves with Ultrasonic Assistance

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2298
Author(s):  
Liang Zhou ◽  
Runlin Han ◽  
Yuxuan Tao ◽  
Jinqu Wang ◽  
Yiwei Luo
Keyword(s):  
Adsorption Capacity ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Co2 Adsorption ◽  
Hollow Structure ◽  
Preparation Time ◽  
Cubic Crystal ◽  
Adsorption Performance ◽  
Ultrasonic Time ◽  
Co2 Adsorption Capacity

Because of its unique eight-membered ring pore structure and the arrangement of cations in its structure, the SSZ-13 molecular sieve has a higher affinity for CO2 than other gases, meaning it has attracted more attention than other porous materials for CO2 adsorption. However, the expensive template and long preparation time limits the industrial production of SSZ-13. In this work, a hollow structure was successfully introduced into the nanosized SSZ-13 molecular sieve with ultrasonic treatment. The effects of the amount of seed added and the ultrasonic time on the structure were investigated. When the amount of seed added was 0.5 wt.% and the ultrasonic time was 60 min, the sample showed a hollow cubic crystal with a diameter of about 50 nm. The specific surface area reached 791.50 m2/g, and the mesoporous ratio was 66.3%. The samples were tested for CO2 adsorption performance at 298 K. It was found that the hollow sample prepared in this work has higher CO2 adsorption capacity compared with the SSZ-13 zeolite prepared with conventional methods. When the adsorption pressure was 0.27 bar, the adsorption amount reached 2.53 mmol/g. The hollow SSZ-13 molecular sieve reached a CO2 adsorption capacity of 4.24 mmol/g at 1 bar.

A polyether amine modified metal organic framework enhanced the CO2 adsorption capacity of room temperature porous liquids

2019 ◽  
Vol 55 (87) ◽  
pp. 13179-13182 ◽  
Author(s):  
Xuemei Zhao ◽  
Yihui Yuan ◽  
Peipei Li ◽  
Zenjun Song ◽  
Chunxin Ma ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Room Temperature ◽  
Co2 Adsorption ◽  
Metal Organic Framework ◽  
Uptake Capacity ◽  
Metal Organic ◽  
Co2 Adsorption Capacity ◽  
Organic Framework

A room-temperature MOF-based porous liquid was prepared and showed an outstanding CO2 uptake capacity.

scholarly journals Study on the Compatibility of Gas Adsorbents Used in a New Insulating Gas Mixture C4F7N/CO2

Processes ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 698 ◽  
Author(s):  
Huang ◽  
Wang ◽  
Liu ◽  
Zhang ◽  
Zeng
Keyword(s):  
Adsorption Capacity ◽  
Molecular Sieves ◽  
Co2 Adsorption ◽  
High Adsorption ◽  
Environment Friendly ◽  
Adsorption Performance ◽  
Co2 Adsorption Capacity ◽  
Liquefaction Temperature ◽  
Electricity Transfer

An environment-friendly insulating gas, perfluoroisobutyronitrile (C4F7N), has been developed recent years. Due to its relatively high liquefaction temperature (around −4.7 °C), buffer gases, such as CO2 and N2, are usually mixed with C4F7N to increase the pressure of the filled insulating medium. During these processes, the insulating gases may be contaminated with micro-water, and the mixture of H2O with C4F7N could produce HF under breakdown voltage condition, which is harmful to the gas insulated electricity transfer equipment. Therefore, removal of H2O and HF in situ from the gas insulated electricity transfer equipment is significant to its operation security. The adsorbents with the ability to remove H2O but without obvious C4F7N/CO2 adsorption capacity are essential to be used in this system. In this work, a series of industrial adsorbents and desiccants were tested for their compatibility with C4F7N/CO2. Pulse adsorption tests were conducted to evaluate the adsorption performance of these adsorbents and desiccants on C4F7N and CO2. The 5A molecular sieve showed high adsorption of C4F7N (22.82 mL/g) and CO2 (43.86 mL/g); F-03 did not show adsorption capacity with C4F7N, however, it adsorbed CO2 (26.2 mL/g) clearly. Some other HF adsorbents, including NaF, CaF2, MgF2, Al(OH)3, and some desiccants including CaCl2, Na2SO4, MgSO4 were tested for their compatibility with C4F7N and CO2, and they showed negligible adsorption capacity on C4F7N and CO2. The results suggested that these adsorbents used in the gas insulated electricity transfer equipment filled with SF6 (mainly 5A and F-03 molecular sieves) are not suitable anymore. The results of this work suggest that it is a good strategy to use a mixture of desiccants and HF adsorbents as new adsorbents in the equipment filled with C4F7N/CO2.

EVALUATION OF MODIFIED FLY ASH BASED NAA-ZEOLITE: EFFECT OF CRYSTALLINITY ON CO2 ADSORPTION CAPACITY

2019 ◽  
Vol 19 (3) ◽  
pp. 475-483 ◽  
Author(s):  
Muvumbu Jean-Luc Mukaba ◽  
Alechine Emmanuel Ameh ◽  
Chuks Paul Eze ◽  
Leslie Felicia Petrik
Keyword(s):  
Fly Ash ◽  
Adsorption Capacity ◽  
Co2 Adsorption ◽  
Naa Zeolite ◽  
Co2 Adsorption Capacity ◽  
Modified Fly Ash

scholarly journals The Increase of the Micoporosity and CO2 Adsorption Capacity of the Commercial Activated Carbon CWZ-22 by KOH Treatment

10.5772/63672 ◽  
2016 ◽  
Author(s):  
Joanna Srenscek-Nazzal ◽  
Urszula Narkiewicz ◽  
Antoni W. Morawski ◽  
Rafal J. Wróbel ◽  
Beata Michalkiewicz
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Co2 Adsorption ◽  
Co2 Adsorption Capacity
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