(553d) Thermodynamic Simulations, Experiments and Techno-Economic Analysis of Iron-Based Chemical Looping Systems for H2 Production

Authors: 
Kathe, M., The Ohio State University
Fan, L. S., The Ohio State University
Kong, F., The Ohio State University
The iron-based moving bed based chemical looping technology developed at the Ohio State University (OSU) is a promising candidate to yield cost benefits in natural gas utilization for a carbon-constrained scenario. OSU has developed three commercially relevant, distinct approaches for high efficiency H2 production from natural gas1,2,3. The first approach focuses on a three-reactor scheme that produces CO2 and H2 in separate reactors, providing process intensification benefits1. The second approach utilizes a membrane based separation scheme to surpass the thermodynamic limits associated with the H2 production system in the first approach2. The third approach retrofits the methane to syngas based co-current reaction system in a steam methane reformer and considers co-feed of steam and CO2 for high efficiency H2 production3. This presentation will initially examine the thermodynamic limits using Gibbs Free Energy minimization the three approaches. The thermodynamic performance will be further quantified by a cold-gas efficiency and an energy efficiency comparison between the three approaches and a baseline Steam Methane Reforming case. Relevant experiments that include high-pressure kinetic data and sub-pilot scale experimental demonstration will be used as an input for a base techno-economic analysis model for the three approaches. Sensitivity studies for each approach that identify the critical parameters to be de-risked for being competitive or better than steam methane reforming plants will be presented.

References

  1. Kathe, M. V., Empfield, A., Na, J., Blair, E., & Fan, L. S. (2016). Hydrogen production from natural gas using an iron-based chemical looping technology: thermodynamic simulations and process system analysis. Applied Energy165, 183-201.
  2. Nadgouda, S. G., Kathe, M. V., & Fan, L. S. (2017). Cold gas efficiency enhancement in a chemical looping combustion system using staged H 2 separation approach. International Journal of Hydrogen Energy, 42(8), 4751-4763.
  3. Kathe, M., Empfield, A., Sandvik, P., Fryer, C., Zhang, Y., Blair, E., & Fan, L. S. (2017). Utilization of CO 2 as a partial substitute for methane feedstock in chemical looping methane–steam redox processes for syngas production. Energy & Environmental Science.