Industrial synthesis of carbon neutral fuels via CO2 + H2

The rise of carbon dioxide removal (CDR) technologies, including Direct Air Capture (DAC) and Direct Ocean Capture, presents new opportunities to address rising atmospheric CO₂ concentrations. However, the long-term storage of captured CO₂ in geological formations poses challenges, such as the risk of leakage, potential groundwater contamination, and economic viability.

An alternative and more sustainable strategy is the conversion of captured CO₂ into value-added chemicals and carbon-neutral fuels. Based on our research into carbon neutral fuel companies, feedstocks of CO₂ and water (H₂O) or CO₂ and hydrogen (H₂) can be converted to carbon neutral fuels. We have delivered the analysis report of synthesis of carbon neutral fuels through CO₂ and H₂O. Here, we illustrate the companies’ pathways that utilize CO₂ and H₂ to synthesize sustainable chemical fuels, including renewable natural gas, alcohols, and liquid fuels through both thermal catalytic and biotechnological processes.

Thermal catalytic processes use high temperatures and specialized catalysts to drive reactions between CO₂ and H₂. Catalyst design for high selectivity and reactor engineering have enabled direct productions of methane (CH₄), syngas, alcohol, or other liquid hydrocarbons. For example, Turn2X develops an unique thermal catalytic reactor that converts CO₂ and H₂ into methane. The thermal catalytic conversion system can be potentially integrated with renewable energy sources, such as solar or wind, to further minimize the carbon footprint of fuel production.

Biotechnological routes use engineered microorganisms  to convert CO₂ and H₂ into fuels through metabolic pathways. These biological systems leverage the power of synthetic biology and metabolic engineering to produce a variety of hydrocarbons (such as methane) and alcohols (such as ethanol). For example, Cycle0 develops an innovative biomethanation bioreactor that converts CO₂ and H₂ into methane. The scalability of these biotechnological solutions is closely tied to the efficiency of biological conversion pathways. The bioreactor system can be potentially integrated with renewable electricity to further reduce the carbon footprint of fuel production.  

We analyze the following companies’ technologies that utilize CO₂ and H₂ to synthesize sustainable chemical fuels through thermal catalytic processes and biotechnology.

(This article contains 7 diagrams and 1707 words.)

Thermal catalytic conversion

Turn2X develops a modular reactor that converts CO₂ and H₂ into methane (CH₄). The diagram below depicts Turn2X’s reactor.