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We study the transport of CO2 molecules inside direct‐air‐capture (DAC) contactors made of packed beds of solid‐sorbent‐particles separated by airgaps using numerical solution of the convection‐diffusion and first‐order adsorption kinetics equations. We quantify an apparent slowdown in the CO2 uptake in such contactors relative to the CO2 uptake of a high‐capacity sorbent particle making the bed....
In this work, an adsorptive reactor (AR) process is considered that can energetically intensify the water gas shift reaction (WGSR). To best understand AR process behavior, a multiscale, dynamic, process model is developed. This multiscale model enables the quantification of catalyst and adsorbent effectiveness factors within the reactor environment, obliviating the commonly employed assumption that...
We present an improved trust region filter (TRF) method for optimization of combined glass box/black box systems. Glass box systems refer to models that are easily expressed in an algebraic modeling language, providing cheap and accurate derivative information. By contrast, black box systems may be computationally expensive and derivatives are unavailable. The TRF method, as first introduced in our...
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