Shop plans, photos and publication references for the Dynamic Diffusion Reactor, DDR, which is used to measure gas composition at the outside and the center of a porous catalyst pellet under dynamic conditions.

DDR-1) Canestra, A. F., L. C. Nett, and Herz, R. K., “Measurement of Gas Composition at the Center of a Porous Pellet during Adsorption and Catalytic Reaction under Dynamic Conditions“, J. Catalysis, 346-354, 1997. https://doi.org/10.1006/jcat.1997.1875

DDR-2) Nett-Carrington, L. C. and Herz, R. K., "Spatiotemporal patterns within a porous catalyst: dynamic carbon monoxide oxidation in a single-pellet reactor," Chemical Engineering Science, 57, 1459-1474, 2002. https://doi.org/10.1016/S0009-2509(02)00046-5

DDR-3) Herz, R. K., "Spatiotemporal patterns in a porous catalyst during light-off and quenching of carbon monoxide oxidation," Chemical Engineering Science, 59, 3983-3991, 2004. https://doi.org/10.1016/j.ces.2004.03.044

ALSO SEE our presentation on the work above at the 4th International Conference on Unsteady State Processes in Catalysis (USPC-4), Montreal, 2003, in the "DDR talk at USPC-4" folder in this github repository.

DDR-4) Herz, R.K., "Scaling parameters for dynamic diffusion-reaction over porous catalysts," Ind. Eng. Chem. Res., 2015, 54 (16), pp 4095-4102. https://doi.org/10.1021/ie503860w + open source copy at http://escholarship.org/uc/item/9bc7v3kv