In comparison to the HC³ pyrolisis and other waste-to-fuel processes have two disadvantages, effecting costs:
The higher pressure requires additional energy input, thus the net energy balance is not as high as the HC³'s.
- As the processor works under the high pressure of 750 PSI, the machinery has to be built to pressure vessel standards, which means they have to fulfill all the regulations that a typical refinery for fossil fuels would require. Operational risks are therefore higher. This means higher construction costs, more sophisticated safety devices and higher insurance expenditures than the HC³ requires.
- Leak in one of the pressurized vessels would free large amounts of dioxins into the atmosphere.