The chemical conversion mechanism of the G-44 Process is different from other gas conversion technologies, such as the Fischer-Tropsch process, or any biological or inorganic photosynthesis technology.
The G-44 Process is projected to cost a fraction, approximately between 1/10th to 1/20th in capital costs, of the current FT gas-to-liquid technologies of similar size, with a greatly reduced complexity of the plant system design. The post-process liquid and gas treatment systems for the G-44 System would be less extensive compared to FT systems and would derive higher value hydrocarbons and oxygenates.
The excess hydrogen supply can be utilized in the post-processing upgrading operations or as green fuel to drive the G-44 Process. Hydrogen will be used as a transportation fuel in the future.
The G-44 Process would have significantly lower capital and operating costs because of the reduced complexity of the physical system and the energy overhead is also considerably less. The FT process usually takes 10,000 to 12,000 cubic feet of gas to produce one-barrel of liquid product equivalent while up to 50% of the gas coming into the system is used as overhead energy, so one would need about 15,000 ft3 of natural gas to make a barrel of product.
Since the G-44 Process operates at about 1/5th the temperature and around 1/10th the pressure of the FT system, the energy requirements should be less than 1/5th of the FT system because of the reduced system complexity. The G-44 Process operates at a fraction of the temperature and pressure of the FT processes.
The G-44 Process does not require the following subsystems, which are required in an FT gas conversion system:
- A preprocess gas separation system for CO2, H2S, nitrogen, water vapor, and SO2.
- Steam methane-reforming plant as a hydrogen source. No external hydrogen source is needed.
- Oxygen generation unit (air separation plant).
- Synthetic gas plant – this is ≅ 50% of capital cost of a FT plant.
- Fischer-Tropsch plant.
- Wax hydrocracking plant.
- Large supporting utility footprint.