# What are the challenges in building a supercritical CO2 gas turbine power plant for a Mars habitat of 6 astronauts?

There is abundant $\require{mhchem}\ce{CO2}$ in martian atmosphere, so we could use that in a modified gas turbine. Can this, combined with PV cells (a hybrid power source), be an efficient energy source? It also turns out that supercritical $\ce{CO2}$ gas turbines are smaller than water steam turbines.

• What would be heating the gas? It seems like that's a much more interesting problem than the medium you're using to transmit power. – Nathan Tuggy Nov 28 '15 at 7:22
• oh sorry, I didn't think about it. how about the sabatier reaction that makes rocket fuel for the Mars Ascent Vehicle be also used for heating the gas? please correct me if i am wrong, I maybe thinking about this in an inefficient way . check this link please : [link] (scientificamerican.com/article/…) – Mathav Raj Nov 28 '15 at 8:01