Modeling of a combined ion transport and porous membrane reactor for oxy-combustion

Investigation of oxygen permeation through disc-shaped BSCF ion transport membrane under reactive conditions

“…It is observed that inclusion of reaction in the sweep (permeate) side of the ITM leads to an increase in the flux of oxygen across the membrane. These observed results are in line with the outcomes obtained by other researchers during their investigation on reactive ITMs . Increase in the oxygen flux is attributed to the consumption of oxygen in the reaction that leads to a reduction of the partial pressures of oxygen in the sweep side of the membrane, shown in Figure .…”

CFD (computational fluid dynamics) analysis of a novel reactor design using ion transport membranes for oxy-fuel combustion

“…This modification was validated experimentally in Hunt et al [20].The flux equation represented by equation (8) has been validated in our earlier work and the details of D v , K r , K f constants can be found in Ref. [36].…”

“…Since the 3-channel reactor is a novel concept, no experimental data is available for validation and this work aims to explore the concept through comparison with a conventional 2 channel reactor configuration. Validation of a 2-channel reactor model was performed previously [36]. The boundary conditions used in the present study are summarized in Table 1.…”

The coupling effect of gas-phase chemistry and surface reactions on oxygen permeation and fuel conversion in ITM reactors

“…Their catalytic activity, coupled with oxygen permeation in a controlled manner, enables their use as catalytic membrane reactors with higher product selectivity [2]. Multiple applications have been extensively investigated using typically methane as a feedstock such as; oxidative coupling [7][8][9][10]; partial oxidation [5,6,11]; and oxy-fuel combustion [12][13][14][15][16]. In spite of these promising applications, the operating regimes, in which fuel conversion and oxygen permeation are predominantly attributed to catalytic or/and gas-phase reactions, have not been examined.…”

“…Although the results from these two studies have elucidated that fuel oxidation reactions and their chemical kinetic rates have substantial influences on oxygen permeation, their models considered a simple well-stirred reactor which does not resolve the state near the surface. Ben-Mansour et al [13], Habib et al [14] and Nemitallah et al [15,16] modeled two dimensional reactors and considered the local thermodynamic state to evaluate the permeation rate, but assumed one-or two-step global reactions without examining the coupling of homogeneous and heterogeneous chemistry to minimize computational costs. Wang and Lin [20] and Tan et al [12] assumed the kinetic parameters of perovskite membranes, but they ignored homogeneous-phase reactions that may take place at the temperature considered in their study.…”