Temperature and conversion patterns in a network of catalytic reactors for methanol synthesis with different switch strategies

Hysteresis in autothermal methane reforming over Rh catalysts: Bifurcation analysis

“…Particularly, the implementation of parametric continuation techniques is effective to detect coexisting solution regimes (e.g. [26][27][28][29][30][31]). …”

Mapping resonance regions in loop networks with spatio-temporal symmetry

“…Indeed, the rotation of inlet and outlet sections enables to trap an exothermic reaction front within the bed ensuring the possibility to operate at high conversion regimes even with streams characterized by very low adiabatic temperature rise. Moreover, the rotation of inlet and outlet sections interacts with spontaneously forming temperature fronts and might determine temperature patterns enhancing yield of prescribed products in equilibrium limited processes [4][5][6][7][8][9].…”

Temperature wave‐trains of periodically forced networks of catalytic reactors

“…It must be also noted that temperature wave trains well reproduce the inter-stage cooling effect of multistage fixed bed reactors significantly increasing the average outlet conversion as equilibrium limited reactions are considered. 17 Despite the practical relevance of these arguments, the physical mechanisms responsible for the emergence of travelling temperature wave trains remain still unclear. In particular, no general guidelines have been provided on how to approximately compute the stability limits of such regimes.…”

“…The implementation of this strategy in the context of equilibrium limited reactions has been shown to allow for the formation of traveling temperature wave trains previously undetected. 17 In this article, networks of N identical catalytic reactors with inlet and outlet sections periodically jumping n s reactors in the flow direction are considered and the effects of varying n s and N on the emergence of symmetric T-periodic regimes corresponding to travelling temperature wave trains are analyzed. To this aim, a pseudo homogeneous reactor model with first-order irreversible exothermic reaction is employed.…”

“…With irreversible exothermic reactions, fresh reactants are indeed completely converted in a single reaction step giving rise to the formation of a unique reaction front travelling at constant velocity whereas multiple reaction fronts characterized by different velocities may form as equilibrium limited reactions are analyzed. 17 In this framework, a geometric approach to the analysis of the NTW energy balance is developed. Following this approach, infinite domains of travelling temperature wave trains are predicted for any n s and N. Moreover, analytical relationships are derived for stability limits and the structure of temperature wave trains in terms of switching, purely thermal and reaction front velocity.…”