@article {49876,
	title = {Integrated flue gas CO2 capture and conversion to formate: a sustainable approach},
	journal = {ChemSusChem},
	volume = {18},
	year = {2025},
	month = {DEC },
	type = {Article},
	abstract = {<p>
	Industrial CO2 emissions, characterized by dilute streams and impurity complexity, demand energy-efficient mitigation strategies beyond conventional capture technologies. Here, an integrated CO2 capture and conversion (ICCC) system is reported employing a heterogenized iridium catalyst-hydroxyquinoline-ligated Cp*Ir-Cl immobilized on amine-functionalized silica-that directly converts CO2 from synthetic flue gas containing SOx, NOx, and O2 to formate with 100\% selectivity. The catalyst delivers remarkable activity, achieving turnover numbers up to 10,286 within 16 h. Density functional theory reveals that its square pyramidal geometry, induced by the hydroxyquinoline ligand, enhances Ir-N(ring) bond strength and electronic delocalization, thereby improving hydration energy, structural robustness, and catalytic efficiency. Importantly, the catalyst system demonstrates excellent durability, maintaining full activity over five regeneration cycles. Hydrogenation in a 1 M DABCO medium, followed by thermal decomposition of the amine-formate adduct at 150 degrees C, enables efficient lean amine regeneration, allowing subsequent flue gas capture and formate production without performance loss. This closed-loop strategy delivers a sustainable, contaminant-tolerant, and recyclable CO2-to-formate platform with strong promise for scalable industrial deployment.</p>
},
	keywords = {CO2 capture, flue gases, integrated capture and conversions, net zero future, Recycle},
	issn = {1864-5631},
	doi = {10.1002/cssc.202502039},
	author = {Kumar, Rohit and Majumder, Supriyo and Singh, Chadrodai Pratap and Samanta, Chanchal and Newalkar, Bharat L. and Krishnamurty, Sailaja and Das, Raj Kumar}
}
