Single dissolution-precipitation model

In the synthesis of single-waUed nanotubes, on the other hand, it is not the vaporization of starting material, but the diffusion of carbon units through the catalyst that is found to be the rate-determining step. The formation of SWNT advances according to the so-called dissolution-precipitation model (DP-model) that postulates a sequence of three steps as discussed below ... 

Steefel, C. I. and A.C. Lasaga, 1994, A coupled model for transport of multiple chemical species and kinetic precipitation/dissolution reactions with application to reactive flow in single phase hydrothermal systems. American Journal of Science 294, 529-592. 

For purposes of discussion, relevant studies in the published literature can be grouped under four topics 1) dissolution in acids, 2) CO2-dependence, 3) effect of impurities and 4) precipitation. These topics cover a diverse literature in methods and conditions of experimental study, and no single set of rate measurements is complete enough for direct comparison with all other studies. In addition, rate equations derived from experiments are usually of limited applicability beyond the experimental results. To date, only the theoretical model of Plummer (1) described above is comprehensive enough to... 

The SPH method has been also used to simulate pore-scale dissolution of the trapped non-aqueous phase liquids, pore-scale miscible non-reactive flows (Tartakovsky and Meakin, 2005 Zhu et al, 2002), and single- and multi-component reactive transport and precipitation (Tartakovsky et al, 2007). Recently, Jiang et al. (2008) developed a meso-scale SPH model for... 

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