Thermal effects on methane steam reforming process were analyzed, in a Pd-Ag (23wt%) membrane reactor as a function of several parameters, such as temperature, reactant and sweep-gas flow rate, and reactant molar ratio. Heat transfer from the oven was very important for the outlet methane conversion, which also depends on the temperature profile along the reactor. In particular, when the reactant flow rate was high the conversion degree decreased because the energy supplied was not sufficient to maintain the temperature in the reactor. A non-isothermal mathematical model was presented which reproduced the experimental data. On a analyst les effets thermiques sur la vapeur de methane, dans un reacteur a membrane Pd-Ag (23wt%) en fonction de plusieurs parametres, tels la temperature, le debit du reactif et du gaz de balayage et le taux molaire du reactif. Le transfert de matiere venant du four joue un grand rde dans la conversion du methane a la sortie, qui depend egalement du profil de temperature dans le reacteur. En particulier, lorsque le debit du reactif est eleve, le degre de conversion diminue parce que l'energie apportee n'est pas suffisante pour maintenir la temperature dam le reacteur. Un modele mathematique non isotherme est presente pour reproduire les donnees experimentales.
Theoretical and experimental analysis of methane steam reforming in a membrane reactor
1999
Abstract
Thermal effects on methane steam reforming process were analyzed, in a Pd-Ag (23wt%) membrane reactor as a function of several parameters, such as temperature, reactant and sweep-gas flow rate, and reactant molar ratio. Heat transfer from the oven was very important for the outlet methane conversion, which also depends on the temperature profile along the reactor. In particular, when the reactant flow rate was high the conversion degree decreased because the energy supplied was not sufficient to maintain the temperature in the reactor. A non-isothermal mathematical model was presented which reproduced the experimental data. On a analyst les effets thermiques sur la vapeur de methane, dans un reacteur a membrane Pd-Ag (23wt%) en fonction de plusieurs parametres, tels la temperature, le debit du reactif et du gaz de balayage et le taux molaire du reactif. Le transfert de matiere venant du four joue un grand rde dans la conversion du methane a la sortie, qui depend egalement du profil de temperature dans le reacteur. En particulier, lorsque le debit du reactif est eleve, le degre de conversion diminue parce que l'energie apportee n'est pas suffisante pour maintenir la temperature dam le reacteur. Un modele mathematique non isotherme est presente pour reproduire les donnees experimentales.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.