Efficiency Improvement of an Iron-based Syngas Fueled Chemical Looping Combustion Plant with Carbon Capture

In this study the performances of two syngas fueled iron-based CLC plants, one using a conventional cold syngas cleaning system and the other one with hot syngas cleaning, were evaluated and compared. In the second configuration, before feeding the chemical looping fuel reactor, the syngas was cleaned at high temperatures using mainly a zinc-based desulfurization unit. The simulation results showed that the plant configured with a hot syngas cleaning system has a net electrical efficiency of 42.6%, which was 1.75% points higher than that of the plant with cold gas cleaning. It was also shown that both CLC plants can achieve more than 99% carbon capture rates.