Continuous Supercritical Water Reactor for Neutralization of Chemical Warfare Agents

A clear understanding of reaction rates, pathways, and mechanisms of organic molecules in supercritical water will inform the design of next-generation supercritical water reactors for the destruction of chemical warfare agents, and the production of gaseous fuel from waste feedstocks. Supercritical water is a "reaction medium of the future" with unique and tunable physical properties which facilitate the rapid breakdown of toxic wastes into gaseous fuels. We have expertise in measuring the decomposition kinetics of model compounds in supercritical water using Raman spectroscopy, and in designing continuous supercritical water reactors for gasification or oxidation regimes.

Our current project goals include:

(1) Development of a continuous supercritical water reactor for the complete destruction of chemical warfare agents while controlling corrosion and buildup of inorganic species

(2) Understanding the decomposition chemistry of model alcohols in supercritical water

(3) Characterizing ignition limits and stability of hydrothermal flames

(4) Characterizing fundamental reaction mechanisms and the behavior of key organic functional groups in supercritical water

Past project accomplishments include:

(1)  Development of a novel supercritical water gasification reactor to study chemical reaction kinetics using in situ Raman spectroscopy

(2) Quantifying the decomposition kinetics of formic acid in subcritical and supercritical water

(3)  Performing CFD simulations for the development of an effective mixing section for rapidly heating and mixing reagents into supercritical water

Refreed publications

  •  Pinkard, B.R., Rasmussen, E.G., Kramlich, J.C., Reinhall, P.G., Novosselov, I.V., Supercritical Water Gasification of Ethanol for Fuel Gas Production, Proceedings of the ASME 2019 13th International Conference on Energy Sustainability, Bellevue, WA
  • Pinkard B.R., Gorman D.J., Rasmussen E., Kramlich J.C., Reinhall P.G., Novosselov I.V., Kinetics of Formic Acid Decomposition in Subcritical and Supercritical Water - A Raman Spectroscopic Study [Preprint]
  • Pinkard B.R., Gorman D.J., Tiwari K., Rasmussen E., Kramlich J.C., Reinhall P.G., Novosselov I.V., Supercritical water gasification: practical design strategies and operational challenges for lab-scale, continuous flow reactors, Heliyon 5(2) February 2019 [doi]
  • Pinkard B.R., Gorman D.J., Tiwari K., Davis J., Rasmussen E., Kramlich J.C., Reinhall P.G., Novosselov I.V., In-Situ Raman Spectroscopy to study Supercritical Water Gasification of Formic Acid,12th International Symposium on Supercritical Fluids, Antibes, France. [link]
  • Tiwari K., Pinkard B.R., Gorman D.J., Davis J., Kramlich J.C., Reinhall P.G., Novosselov I.V., Computational Modelling of Mixing and Gasification in Continuous-Flow Supercritical Water Reactor, 12th International Symposium on Supercritical Fluids, Antibes, France.[link]
  • Pinkard B.R., Gorman D.J., Tiwari K., Kramlich J.C., Reinhall P.G., Novosselov I.V., Review of Gasification of Organic Compounds in Continuous-Flow Supercritical Water Reactors, Industrial & Engineering Chemistry Research (2018)57(10):3471-81. [doi]