You are here:

Thermodynamics/Bosch Reaction with no Catalyst

Advertisement


Question
Can the reaction CO2(g) + 2 H2(g) → C(s) + 2 H2O(g) occur at a very high temperature and/or pressure without a catalyst?

Answer
Hi Jeffrey,

The Bosch reaction is actually two sequential reactions. The first is fast and needs no catalyst.

CO2 + H2 -> CO + H2O

Followed by

CO + H2 ->  C + H2O

The second is slow and needs catalysis even at operating temperatures of 500-600 C.

Many different catalysts have been used (Fe, Rh etc.) and many forms have been tried to overcome the tendency of the graphite (C) to foul the catalyst.

Increasing pressure and temperature will speed the second reaction but not sufficiently to make it worth-while as material limits (melting steels, corrosion, and safe working pressures) are soon met.

I hope this helps.
Best wishes.
Kevin.

Thermodynamics

All Answers


Answers by Expert:


Ask Experts

Volunteer


Kevin

Expertise

Thermodynamics, chemistry, chemical reactions, kinetics, chemical reaction safety, dust explosion technology, static electricity. General science.

Experience

Over 40 years experience as a practicing thermochemist in industry. Head of the fire and explosion laboratory of a major European chemical company (Ciba-Geigy). Now retired.

Organizations
Institute of Chemical Engineers. Royal Society of Chemistry.

Education/Credentials
Chartered Chemist, Member of the Royal Society of Chemistry (C.Chem MRSC). Msc Sheffield.

©2016 About.com. All rights reserved.