A process for producing a hydrogen-containing product gas, the process comprising: introducing a reformer feed gas mixture comprising at least one hydrocarbon and steam into a plurality of catalyst-containing reformer tubes in a reformer furnace, reacting the reformer feed gas mixture in a reforming reaction under reaction conditions effective to form a reformate comprising H 2, CO, CH 4, and H 2 O, and withdrawing the reformate from the plurality of catalyst-containing tubes; combusting a fuel (82, 35) with an oxidant gas in a combustion section of the reformer furnace external to the plurality of catalyst-containing reformer tubes under conditions effective to combust the fuel (82, 35) to form a combustion product gas and generate heat to supply energy for reacting the reformer feed gas mixture inside the plurality of catalyst-containing reformer tubes, and withdrawing the combustion product gas from the combustion section; passing the reformate from the plurality of catalyst-containing reformer tubes to a shift reactor and reacting the reformate in the presence of a shift catalyst under reaction conditions sufficient to shift the reformate to form additional H 2 in the reformate; passing the reformate from the shift reactor to a steam generator via a first plurality of heat exchangers (311, 312, 313, 314, 315), the first plurality of heat exchangers operatively connecting the shift reactor to the steam generator, thereby cooling the reformate in the first plurality of heat exchangers; heating a first water stream by indirect heat transfer with the reformate in the steam generator to produce a steam stream from the first water stream; passing a first portion or all of the steam stream to a heat exchanger for heating a hydrocarbon feed and heating a hydrocarbon feed by indirect heat transfer with the first portion or all of the steam stream; forming the reformer feed gas mixture from a reformer feed, wherein the reformer feed comprises at least a portion of the hydrocarbon feed that was heated in the heat exchanger for heating the hydrocarbon feed; passing the reformate from the steam generator to a condensate separator via a second plurality of heat exchangers (316, 317, 322, 323), the second plurality of heat exchangers operatively connecting the steam generator to the condensate separator, thereby condensing water in the reformate to form a water condensate and a water-depleted reformate, and separating the water condensate from the water-depleted reformate in the condensate separator; and forming the hydrogen-containing product gas from at least a portion of the water-depleted reformate. introducing a reformer feed gas mixture comprising at least one hydrocarbon and steam into a plurality of catalyst-containing reformer tubes in a reformer furnace, reacting the reformer feed gas mixture in a reforming reaction under reaction conditions effective to form a reformate comprising H 2, CO, CH 4, and H 2 O, and withdrawing the reformate from the plurality of catalyst-containing tubes; combusting a fuel (82, 35) with an oxidant gas in a combustion section of the reformer furnace external to the plurality of catalyst-containing reformer tubes under conditions effective to combust the fuel (82, 35) to form a combustion product gas and generate heat to supply energy for reacting the reformer feed gas mixture inside the plurality of catalyst-containing reformer tubes, and withdrawing the combustion product gas from the combustion section; passing the reformate from the plurality of catalyst-containing reformer tubes to a shift reactor and reacting the reformate in the presence of a shift catalyst under reaction conditions sufficient to shift the reformate to form additional H 2 in the reformate; passing the reformate from the shift reactor to a steam generator via a first plurality of heat exchangers (311, 312, 313, 314, 315), the first plurality of heat exchangers operatively connecting the shift reactor to the steam generator, thereby cooling the reformate in the first plurality of heat exchangers; heating a first water stream by indirect heat transfer with the reformate in the steam generator to produce a steam stream from the first water stream; passing a first portion or all of the steam stream to a heat exchanger for heating a hydrocarbon feed and heating a hydrocarbon feed by indirect heat transfer with the first portion or all of the steam stream; forming the reformer feed gas mixture from a reformer feed, wherein the reformer feed comprises at least a portion of the hydrocarbon feed that was heated in the heat exchanger for heating the hydrocarbon feed; passing the reformate from the steam generator to a condensate separator via a second plurality of heat exchangers (316, 317, 322, 323), the second plurality of heat exchangers operatively connecting the steam generator to the condensate separator, thereby condensing water in the reformate to form a water condensate and a water-depleted reformate, and separating the water condensate from the water-depleted reformate in the condensate separator; and forming the hydrogen-containing product gas from at least a portion of the water-depleted reformate.