Millisecond timescale reactions observed via X-ray spectroscopy in a 3D microfabricated fused silica mixer

Huyke, D.A.; Ramachandran, A.; Ramirez-Neri, O.; Guerrero-Cruz, J.A.; Gee, L.B.; Braun, A.; Sokaras, D.; Garcia-Estrada, B.; Solomon, E.I.; Hedman, B.; Delgado-Jaime, M.U.; DePonte, D.P.; Kroll, T.; Santiago, J.G.

doi:10.1107/S1600577521003830

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Figure 8
Predicted depth-averaged, unreacted sample fraction M_R versus the Lagrangian sample residence time t for varied reaction half-lives t_1/2 and fixed sample Q_sa and sheath Q_sh flow rates. The reaction studied involved ascorbic acid H₂Asc and ferricyanide $[{\rm{Fe}}\left({{\rm{CN}}}\right)_6^{3-}]$ reactants and dehydroascorbic acid Asc and ferrocyanide $[{\rm{Fe}}\left({{\rm{CN}}}\right)_6^{4-}]$ products. The shaded area near the lines shows the range of possible M_R given variations in sample and sheath species diffusivities of 10%. The second-order decay rate for these simulations was estimated as k = $[\ln\left(2\right)/{t_{1/2}}{\left[{{{\rm{H}}_2}{\rm{Asc}}}\right]_0}]$ . Data are for initial concentrations of $[{\left[{{\rm{Fe}}\left({{\rm{CN}}}\right)_6^{3-}}\right]_0}]$ = 40 mM and [H₂Asc]₀ = 200 mM.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 28| Part 4| July 2021| Pages 1100-1113

https://doi.org/10.1107/S1600577521003830

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