Dusty gas models

Equation (5.177) resulting from the rigorous model (dusty gas model) for diffusion and flow is not easy to implement for a multi-component system. Some investigators (Soliman et al., 1988 Xu and Froment, 1989b Elnashaie and Abashar, 1992) have used simplified... 

Figures 5.64a,b show the effectiveness factor profiles of reactions (I, II, III) obtained by the dusty gas model and simplified model I and II at steam to methane ratio equal to 5.0. The models show the existence of non-monotonic behaviour of the effectiveness factor for reaction I. The explanation for this behaviour follows the same basis presented earlier. There are large differences between the effectiveness factors profiles of reaction II and III obtained by the rigorous model (dusty gas model) and the simplified models (I, II) as shown in Figure 5.64. The effectiveness factor profiles of reaction I, II and III predicted by the...

The left hand side of the first order difierential equation of methane (5.212) for the rigorous model (dusty gas model) is transformed to ... 

Using the simulation package PARSIM even complex gas-solid reaction systems can be simulated without problems. Many important models (Dusty-Gas-Model, pore models) are provided by PARSIM. It can be stated that the discretization by the OCFE-method is more stable and more accurate compared to the FD-method and thus demands less simulation time at a required accuracy. 

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