(US5209906-A)      Modular isothermal reactor comprises; (a) a sealing plate; (b) a baffle plate having heat transfer structures; (c) a housing between the sealing plate and baffle plate and has an interior surface circumscribing the heat transfer structures so that the cooperating surfaces of the sealing plate, the baffle plate, the heat transfer structures and the housing define a labyrinth channel contg. a solid catalyst and accommodating the flow of feedstock and fuel therethrough; (d) a fluid flow plate adjacent to the baffle plate.    The cooperating surfaces of the fluid flow plate and the baffle plate define a flow passage for carrying a thermal fluid.    USE/ADVANTAGE -   For isothermal reactors for converting a feedstock into a fuel for power generation systems and is capable of providing reformate fuel for electrochemical fuel cells.    (JP6507145-W)      Modular isothermal reactor useful in power generation systems comprises (a) a sealing plate; (b) a baffle plate located in spaced opposed relationship relative to the sealing plate; (c) several heat conductors on one side of the baffle plate and extending towards the sealing plate; (d) a housing between the sealing plate and the baffle plate, the housing having an interior surface surrounding the heat conductors, such that the sealing plate, the baffle plate, the heat conductors and the housing interior surface together form a channel for containing a solid catalyst and passing the flow of feedstock and fuel; and (e) a fluid flow plate adjacent the other side of the baffle plate, the fluid flow plate and the baffle plate providing a fluid flow passage between them for carrying a thermal fluid, which fluid flow passage is separate from the channel.    Pref. the heat conductors are in the form of concentric arcuate walls on the baffle plate. The channel may have a tortuous or labyrinthine configuration providing a relatively long and narrow reactant path with minimal-sectional area increasing the linear velocity of the reactants for a given space velocity.    ADVANTAGE -   The reactor design provides for sufficiently high linear velocities precluding thick boundary layers along the reactor walls, which happens in previous designs, the thinner boundary layers providing efficient transfer of heat from the heated side of the plates to the reactor side.    (JP2644922-B2)      Modular isothermal reactor useful in power generation systems comprises (a) a sealing plate; (b) a baffle plate located in spaced opposed relationship relative to the sealing plate; (c) several heat conductors on one side of the baffle plate and extending towards the sealing plate; (d) a housing between the sealing plate and the baffle plate, the housing having an interior surface surrounding the heat conductors, such that the sealing plate, the baffle plate, the heat conductors and the housing interior surface together form a channel for containing a solid catalyst and passing the flow of feedstock and fuel; and (e) a fluid flow plate adjacent the other side of the baffle plate, the fluid flow plate and the baffle plate providing a fluid flow passage between them for carrying a thermal fluid, which fluid flow passage is separate from the channel.    Pref. the heat conductors are in the form of concentric arcuate walls on the baffle plate. The channel may have a tortuous or labyrinthine configuration providing a relatively long and narrow reactant path with minimal-sectional area increasing the linear velocity of the reactants for a given space velocity.    ADVANTAGE -   The reactor design provides for sufficiently high linear velocities precluding thick boundary layers along the reactor walls, which happens in previous designs, the thinner boundary layers providing efficient transfer of heat from the heated side of the plates to the reactor side.