“…In this Perspective, we discuss some of the challenges and inconsistencies associated with H 2 amounts, GHSVs, and conversion calculations. Although we have identified instances of different definitions of conversion, it is rare to find details of H 2 conversion in the literature, which is important for providing context to how much H 2 is consumed during the DFM experiments . It is also worth noting that it is not atypical, as shown in Table , that the GHSV during hydrogenation is different from that during CO 2 capture.…”