Evolution of working Units in the field for test and validation:

• POC #1: single reactor core in HHR module, unreliable water and gas feed method, 8-inch CO2 removal columns

• POC #2: single reactor core in HHR module, improved water and gas feed method, 10-inch CO2 removal columns

• POC #3: dual reactor cores in HHR module, further improved water feed to increase fidelity of flow measurement, 10-inch CO2 removal columns