Improving the synthesis process of chromium benzenedicarboxylate, MIL-101(Cr), by a microwave pre-step for CO2 adsorption

• Published in: Journal of the Iranian Chemical Society Vol. 18; no. 9; pp. 2283 - 2289
• Main Authors: Soltanolkottabi, Fariba, Talaie, M. R.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 2021; Springer Nature B.V
• Subjects: Adsorbents; Adsorption; Analytical Chemistry; Biochemistry; Carbon dioxide; Chemical synthesis; Chemistry; Chemistry and Materials Science; Chromium; Heating; Inorganic Chemistry; Organic Chemistry; Original Paper; Physical Chemistry; Production methods; Microwave; adsorption; CO; Electrical heating; MIL-101(Cr)
• ISSN: 1735-207X; 1735-2428
• DOI: 10.1007/s13738-021-02189-w

The primary objective of the present study is to compare the result of adding a microwave-heating pre-step (MW) to the conventional electrical heating method (CE) to synthesize chromium benzenedicarboxylate, MIL-101(Cr), for CO 2 adsorption applications. The results show that using conventional CE the time required to complete the synthesis reaction is 24 h while adding a short-period MW to CE as a pre-step can reduce this time to 5 h. The MW pre-step can be carried out under either autogenous pressure or atmospheric condition. The results also revealed that both methods are capable of producing MIL-101(Cr); however, CE method can produce the adsorbent with the CO 2 adsorption capacity 7.7 mmol/g at 5.0 bar and 25˚C, while the adsorbent synthesized using hybrid method can possess the adsorption capacity 6.1 mmol/g at the same condition.