Reactor with expandable structure providing improved heat transfer
A method and a reactor made by a method for increasing heat transfer from a heat source outside a vessel to the fluid inside the vessel are characterized by expanding a structure within the vessel toward the inner vessel surface so as to decrease the spacing between the structure and the vessel wall. The structure may be any of the various so-called structured packings, for example, ceramic honeycombs, metal honeycombs, plate stacks, and the like. The structure may comprise catalyst. The reactor provides high activity, low pressure drop, and high heat transfer. The reactor may be especially suitable for steam hydrocarbon reforming.
1. A method of making a reactor comprising:
providing a vessel having a vessel longitudinal axis, and an inner vessel surface;
introducing a structure having a plurality of substantially parallel passages into the vessel to define a first average spacing between the structure and the inner vessel surface, the plurality of substantially parallel passages having a plurality of passage longitudinal axes which are not parallel to the vessel longitudinal axis; and
expanding the structure toward the inner vessel surface thereby defining a second average spacing between the structure and the inner vessel surface wherein the second average spacing is less than the first average spacing to make the reactor.
2. The method of claim 1 wherein the structure comprises at least two complementary structure segments and wherein the step of expanding the structure comprises inserting a spreader between the at least two complementary structure segments.
3. The method of claim 1 further comprising:
compressing the structure prior to the step of introducing the structure into the vessel; and
constraining the structure by a restraint during the step of introducing the structure into the vessel;
wherein the step of expanding comprises disengaging the restraint.
4. The method of claim 1 wherein the method further comprises:
applying a catalyst to the structure.
5. The method of claim 1 further comprising:
combining a plurality of flat plates and a plurality of corrugated plates to form a number (n) of complementary structure segments greater than 2, wherein a first complementary structure segment from the number (n) of complementary structure segments thereby comprises a first flat plate from the plurality of flat plates and a second flat plate from the plurality of flat plates, the second flat plate parallel to the first flat plate, wherein the first flat plate defines an angle with a nearest inner edge of the first complementary structure segment, wherein the angle is
180
°
n
±
5
°
;
and
assembling the number (n) of complementary structure segments from the step of combining to form the structure prior to introducing the structure into the vessel;
wherein the step of expanding the structure comprises inserting a spreader between the first complementary structure segment and a second complementary structure segment from the number (n) of complementary structure segments.