Environmental Performance of Alternative Schiff Bases Synthesis Routes: A Proposal for CO2 Storages

Document Type : Original Research Paper


1 Department of Chemistry, College of Science, Tikrit University, 34001 Saladin, Iraq

2 Department of Chemistry, College of Science, Al‐Nahrain University, 64021 Baghdad, Iraq

3 Department of Environmental Science, College of Energy and Environmental Science, Alkarkh University of Science, 10081 Baghdad, Iraq

4 School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia

5 Department of Medical Instrumentation Engineering, Al-Mansour University College, 64021 Baghdad, Iraq


The increased consumption of fossil fuels provokes high levels of carbon dioxide (CO2) emissions, which give rise to serious environmental issues. Accordingly, designing and utilizing new classes of materials, such as Schiff bases, to capture CO2 gained significant attention from researchers worldwide. In the present work, two Schiff bases were synthesized and examined as storage materials for carbon dioxide gas. The prepared compounds were obtained by reacting trimethoprim with two aldehydes severally (benzaldehyde and parabromobenzaldehyde) in boiling methanol. The surface morphology of the compounds was investigated via field emission scanning electron microscopy (FESEM). The Brunauer-Emmett-Teller (BET) test showed that Schiff bases 1 and 2 have surface areas of 17.993 and 2.732 m2/g, pore volumes of 0.008 and 0.005 cm3/g, and pore diameters of 17.02 and 74.89 nm, respectively. Reasonable uptake values of CO2 (31.36 cm3/g, 6.2 wt%) and (25.30 cm3/g, 5.0 wt%) were achieved by the prepared Schiff bases 1 and 2, respectively, at 313 K temperature and 40 bars pressure.


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