A Process for Carbon Dioxide Capture Using Schiff Bases Containing a Trimethoprim Unit

Environmental problems associated with the growing levels of carbon dioxide in the atmosphere due to the burning of fossil fuels to satisfy the high demand for energy are a pressing concern. Therefore, the design of new materials for carbon dioxide storage has received increasing research attention....

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Bibliographic Details
Published in:Processes 2021-04, Vol.9 (4), p.707
Main Authors: Yaseen, Anaheed A., Al-Tikrity, Emaad T. B., El-Hiti, Gamal A., Ahmed, Dina S., Baashen, Mohammed A., Al-Mashhadani, Mohammed H., Yousif, Emad
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aldehydes
Ammonia
Burning
Carbon dioxide
Carbon sequestration
Climate change
Consumption
Environmental impact
Fossil fuels
Fourier transforms
Gases
High temperature
Imines
Metal oxides
Morphology
Nitrogen
Pore size
Potash
Potassium
Scanning electron microscopy
Surface area
Trimethoprim
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Summary:Environmental problems associated with the growing levels of carbon dioxide in the atmosphere due to the burning of fossil fuels to satisfy the high demand for energy are a pressing concern. Therefore, the design of new materials for carbon dioxide storage has received increasing research attention. In this work, we report the synthesis of three new Schiff bases containing a trimethoprim unit and the investigation of their application as adsorbents for carbon dioxide capture. The reaction of trimethoprim and aromatic aldehydes in acid medium gave the corresponding Schiff bases in 83%–87% yields. The Schiff bases exhibited surface areas ranging from 4.15 to 20.33 m2/g, pore volumes of 0.0036–0.0086 cm3/g, and average pore diameters of 6.64–1.4 nm. An excellent carbon dioxide uptake (27–46 wt%) was achieved at high temperature and pressure (313 K and 40 bar, respectively) using the Schiff bases. The 3-hydroxyphenyl-substituted Schiff base, which exhibited a meta-arrangement, provided the highest carbon dioxide uptake (46 wt%) due to its higher surface area, pore volume, and pore diameter compared with the other two derivatives with a para-arrangement.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr9040707