Porous Aromatic Melamine Schiff Bases as Highly Efficient Media for Carbon Dioxide Storage

High energy demand has led to excessive fuel consumption and high-concentration CO2 production. CO2 release causes serious environmental problems such as the rise in the Earth’s temperature, leading to global warming. Thus, chemical industries are under severe pressure to provide a solution to the p...

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Bibliographic Details
Published in:Processes 2020-01, Vol.8 (1), p.17
Main Authors: Omer, Raghad M., Al-Tikrity, Emaad T. B., El-Hiti, Gamal A., Alotibi, Mohammed F., Ahmed, Dina S., Yousif, Emad
Format: Article
Language:English
Subjects:
Activated carbon
Adsorbents
Adsorption
Carbon dioxide
Carbon sequestration
Chemical industry
Chemicals
Emission analysis
Emissions control
Energy storage
Environmental impact
Field emission microscopy
Fuel consumption
Gases
Global warming
Imines
Melamine
Morphology
Nitrogen
Particle size
Physical properties
Potassium
Scanning electron microscopy
Sorbents
Surface chemistry
Zeolites
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Summary:High energy demand has led to excessive fuel consumption and high-concentration CO2 production. CO2 release causes serious environmental problems such as the rise in the Earth’s temperature, leading to global warming. Thus, chemical industries are under severe pressure to provide a solution to the problems associated with fuel consumption and to reduce CO2 emission at the source. To this effect, herein, four highly porous aromatic Schiff bases derived from melamine were investigated as potential media for CO2 capture. Since these Schiff bases are highly aromatic, porous, and have a high content of heteroatoms (nitrogen and oxygen), they can serve as CO2 storage media. The surface morphology of the Schiff bases was investigated through field emission scanning electron microscopy, and their physical properties were determined by gas adsorption experiments. The Schiff bases had a pore volume of 0.005–0.036 cm3/g, an average pore diameter of 1.69–3.363 nm, and a small Brunauer–Emmett–Teller surface area (5.2–11.6 m2/g). The Schiff bases showed remarkable CO2 uptake (up to 2.33 mmol/g; 10.0 wt%) at 323 K and 40 bars. The Schiff base containing the 4-nitrophenyl substituent was the most efficient medium for CO2 adsorption and, therefore, can be used as a gas sorbent.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr8010017