fig6
Figure 6. Model of HAP structure and activity test for catalysts. (A) Crystal structure of hydroxyapatite. (B) Methane production rate with and without light at various temperatures and Arrhenius plot. (~2.0 W cm-2 light intensity, H2:CO2 ratio 1:1, flow rate = 2 sccm). (C) The CO production rate of Cu-HAP depended on the Cu loading amount. (D) RWGS activities of various samples in the batch reactor. (E) Duration test of 10% Cu-HAP at 300 °C under light irradiation. (F) In bulk industrial, price and quantity for synthesis of catalysts are used for RWGS reaction. Reproduced with permission from Ref.[58].
