We report an apparatus for in-situ nuclear magnetic resonance (NMR) studies of chemical reactions of dissolved 13CO2 with minerals (rock or powder) under continuous flow. The operating range of the apparatus is 18–150 °C and 1–140 bar. A flow pump is used to circulate a CO2-water solution, with a heated mixing vessel where CO2 gas equilibrates with a water solution. The NMR probe is built around a strong zirconia ceramic vessel, with o-ring sealed connections; the mineral is contained inside. The horizontal orientation of the zirconia vessels allows use of a radio frequency (rf) solenoid for improved spin sensitivity.
Sesti, E. L., Cui, J., Hayes, S. E., & Conradi, M. S. (2017). A flow-through, elevated-temperature and -pressure NMR apparatus for in-situ CO2 sequestration studies. Journal of Magnetic Resonance, 282, 136–141. https://doi.org/10.1016/j.jmr.2017.08.005