A qualitative comparison of gas turbine cycles with CO_2 capture

摘要

Nine different concepts for natural gas fired power plants with CO_2 capture have been investigated, and a qualitative comparison is made based on technological maturity and operational challenges. This analysis is a follow-up of a quantitative analysis of the same concepts presented in previous papers. The cycles constitute one post-combustion, six oxy-fuel and two pre-combustion concepts. A methodology is developed enabling comparison based on the two qualitative criteria. The results show a similar trend with respect to increasing immaturity level and increasing operational challenges. However, the trend is slightly opposite when it comes to net plant efficiency meaning that the concepts facing high operational challenges and require technological breakthroughs to be realized, exhibit the best plant efficiencies.