Abstract: A sealing system for a tubular reactor comprising an inner wall, comprising a main body having a circular section and comprising a peripheral wall configured so that at least its upper part matches the inner wall of the tubular reactor, said peripheral wall comprising at least an annular lodging comprising a sealing sitting on an annular pusher, with the pusher configured to push the sealing ring in the peripheral wall of the main body and the main body having a sufficient weight to push the sealing ring against the inner wall of the tubular reactor.

Abstract: Process for producing a chemical product, comprising subjecting hydrocarbon feed and further reforming reactant to an endothermal reaction whereby a primary reformate is formed, in a primary fired heat-recuperating reformer reaction unit, comprising a catalyst zone and a primary reformate passage way arranged to transfer heat from said reformate to said catalyst zone; optionally subjecting the primary reformate to a secondary reforming reaction, thereby forming a secondary reformate; and using primary reformate or second reformate as a heat exchange medium to supply reaction heat to an endothermal reaction, which endothermal reaction is carried out in a parallel heat-exchanger reactor.

Abstract: The invention relates to a hydrogen plant for producing a hydrogen-comprising gas product comprising—a reformer system comprising at least one heat-recuperating reformer reaction unit (5) or a reformer system comprising two or more reformer units (5,22) in parallel, wherein at least one of said parallel reformer units (5) is present in the radiant section (12) of the reformer system, and at least one reformer unit (22) is located outside the radiant section (12) of the reformer system; —a unit (8) configured to obtain hydrogen product gas; —a carbon dioxide capture unit; the hydrogen plant further comprising a passage way configured to feed a hydrogen-comprising gas stream to the radiant section. The invention further relates to a process for producing a hydrogen-comprising gas product.