After gas injection, all autoclaves are isolated volumes and volatile reaction products cannot move across parallel reactors. The heat blocks quickly heat up the reaction mixture to working temperature. The autoclave reactors are PTFE-lined and can be used up to 200°C with a pressure rating of 180 bar to enable excess gas feedstock and potential temperature runaways. 2 mL liquid volume compatible with routine analysis such as GC, HPLC, and UV-VIS spectroscopy.