Abstract: Apparatus, systems, and processes for reforming hydrocarbons are provided. The process can include reforming a first hydrocarbon in the presence of steam and one or more first catalysts in a first reformer to produce a first reformed hydrocarbon. The process can also include reforming the first reformed hydrocarbon in the presence of one or more second catalysts in a second reformer to produce a second reformed hydrocarbon. The process can also include reforming a second hydrocarbon in the presence of steam and one or more third catalysts in a third reformer to produce a third reformed hydrocarbon, where heat from the second reformed hydrocarbon is transferred to the second hydrocarbon to support reforming of the second hydrocarbon.

Abstract: Apparatus, system, and method for producing syngas. The apparatus can include a first reformer, which can include a radiant section having a reformer tube disposed therein. The reformer tube can be at least partially filled with a first catalyst. The first reformer can also include a transition section coupled to the radiant section, a convective section coupled to the transition section, and a plurality of pre-reformer tubes disposed in the transition section. The plurality of pre-reformer tubes can be filled with a second catalyst and fluidly coupled to the reformer tube via a line external to the plurality of pre-reformer tubes. At least one of the plurality of pre-reformer tubes can have at least one extended surface disposed thereon. The second reformer can be coupled to the reformer tube and to an oxidant source. The third reformer can be coupled to the second reformer and to the reformer tube.

Abstract: Apparatus, systems, and processes for reforming hydrocarbons are provided. The process can include reforming a first hydrocarbon in the presence of steam and one or more first catalysts in a first reformer to produce a first reformed hydrocarbon. The process can also include reforming the first reformed hydrocarbon in the presence of one or more second catalysts in a second reformer to produce a second reformed hydrocarbon. The process can also include reforming a second hydrocarbon in the presence of steam and one or more third catalysts in a third reformer to produce a third reformed hydrocarbon, where heat from the second reformed hydrocarbon is transferred to the second hydrocarbon to support reforming of the second hydrocarbon.

Abstract: Apparatus, system, and method for producing syngas. The apparatus can include a first reformer, which can include a radiant section having a reformer tube disposed therein. The reformer tube can be at least partially filled with a first catalyst. The first reformer can also include a transition section coupled to the radiant section, a convective section coupled to the transition section, and a plurality of pre-reformer tubes disposed in the transition section. The plurality of pre-reformer tubes can be filled with a second catalyst and fluidly coupled to the reformer tube via a line external to the plurality of pre-reformer tubes. At least one of the plurality of pre-reformer tubes can have at least one extended surface disposed thereon. The second reformer can be coupled to the reformer tube and to an oxidant source. The third reformer can be coupled to the second reformer and to the reformer tube.