Combined capture and reduction of CO2 to methanol using a dual-bed packed reactor

Modified Cu–Zn–Al mixed oxide dual function materials enable reactive carbon capture to methanol

“…With the separate bed configuration, CO 2 was proposed to desorb from the sorbent bed during the initial temperature ramp and then subsequently convert as a gas phase reactant on the downstream bed. 29 However, on the Alk/CZA DFMs employed here, we hypothesize that the co-location of the sorbent and catalyst sites offer a synergistic mechanism, in which adsorbed and activated CO 2 reacts with nearby hydrogenation sites through a surface migration or spillover effect. Similar mechanisms have been proposed for many solid-phase DFMs such as methanation DFMs 38 and the Pd-amine DFMs.…”

“…, CZA). 29 While this configuration was able to capture ca. 150 μmol g −1 of CO 2 , the MeOH productivity was considerably lower at 12 μmol g −1 due to low conversion of 20% and MeOH selectivity of 22%.…”

“…1, has been attempted just a few times thus far. 27–29 The reported attempts have exhibited low overall conversion of initially captured CO 2 ( i.e. , low working capacity) and low MeOH yield.…”

“…28 In an alternative approach using a stacked bed of sorbent and catalyst, a similarly low productivity of 12 μmol g −1 was reported. 29…”