Bosch reaction

What is Bosch reaction?

The Bosch reaction is a chemical process that involves the catalytic reduction of carbon dioxide CO2 and hydrogen H2 to produce elemental carbon C (graphite), water H2O, and a 10 % return of invested heat. This reaction typically takes place at temperatures ranging from 530-730 °C in the presence of a catalyst such as iron Fe.

The overall reaction is represented by the equation:

CO2(g) + 2 H2(g) → C(s) + 2 H2O(l)

In reality, the above reaction is the result of two separate reactions. The first reaction, known as the reverse water gas shift reaction, occurs quickly:

CO2 + H2 → CO + H2O

The second reaction is the rate-determining step:

CO + H2 → C + H2O

The presence of catalysts such as iron, cobalt, nickel, or ruthenium can accelerate the reaction.

The Bosch reaction, along with the Sabatier reaction, is being investigated as a potential method for eliminating carbon dioxide CO2 and producing pure water H2O on a space station.