Cactus biogas v/s hydrogen

Hydrogen is considered one of the most promising gases for cleaning the environment and as a fuel for light and heavy vehicles. It can be obtained in various ways from the chemical point of view, but the best known is the hydrolysis of water, this is the separation of hydrogen and oxygen that make up water by means of an electric current.

In the image, each step represents a different energy level, which depends on the type and number of chemical bonds, the more bonds a molecule has, the more energy.


The molecules of water (H2O) and that of carbon dioxide (CO2) must be considered as terminal molecules with very little energy, in our energy ladder they would be at ground level.


When electrical energy is applied, the water molecule is divided into its essential components: hydrogen (H2) and oxygen (O2), remaining in a higher energetic step, the first step.In the case of the CO2 molecule, it is adsorbed by plants and through a complex process, photosynthesis, it is transformed into components with higher carbon numbers or organic molecules.


The biogas production process breaks down these more complex molecules into a bacterial waste product known as methane (CH4). This gas is 4 steps higher than hydrogen on the energy ladder. Therefore, when burned and transformed into CO2, it produces 4 times more energy than hydrogen.

Abstract stairs
EGE-biogas-hydrogen