Nanowerk November 9, 2022
An international team of researchers (UK, Spain) has demonstrated the feasibility of a Dual Function Material’s (DFM) ability to passively capture CO2 directly from the air opening the possibilities of chemical production from dilute sources of CO2, through a combination of CO2 adsorption and subsequent chemical transformation. Combinations of Ni Ru bimetallic catalyst with Na2O, K2O or CaO adsorbent were supported on CeO2–Al2O3 to develop flexible DFMs. They were shown to reversibly adsorb CO2 between the 350 and 650 °C temperature range and were easily regenerated by an inert gas purge stream. Captured CO2 could be converted into useful products through either CO2 methanation, reverse water–gas shift or dry reforming of methane, which provides flexibility in terms of co-reactant and the end product by adjusting reaction conditions. The best DFM was the one containing CaO, producing 104 μmol of CH4 per kgDFM in CO2 methanation, 58 μmol of CO per kgDFM in RWGS and 338 μmol of CO per kgDFM in DRM…read more. Open Access TECHNICAL ARTICLEÂ
CO2 Adsorption/desorption cycles of NiRuNa, NiRuK and NiRuCa at (A) 350 °C, (B) 450 °C, (C) 550 °C and (D) 650 °C. Credit: Nanoscale, 2022, 14, 12620-12637Â