Abstract: A vessel for dehydrating a natural gas stream using molecular sieve material contained therein and a method for designing such a vessel are described. The vessel includes cylindrical vessel walls having a plurality of thermally conductive plates attached to the inner surface thereof. The plurality of thermally conductive plates are distributed vertically and circumferentially through the cylindrical portion of the vessel. The dimensions of the thermally conductive plates can be determined using computational fluid dynamics analysis of a process for regenerating the molecular sieve material. It is possible to reduce the duration of operation in regeneration mode using the vessel of the present disclosure.