NOVELTY - Energy conversion process that exports byproduct carbon dioxide (CO2), comprises: (a) mixing a second fuel gas feed stream (12, 56) derived from first fuel gas stream (10) with a reactant stream (40, 74) into at least part of second fuel gas feed stream and/or reactant stream to produce mixed feed gas stream and CO2-lean solvent stream (38); (b) reacting the mixed feed gas stream in chemical conversion step; (c) chilling the products (20) of the chemical conversion step; and (d) passing the CO2-lean gas stream (28) to second stage contactor to produce a product gas stream (50, 58).    USE - The process is useful as an energy conversion process to produce a product gas stream (claimed) for the capture and disposal of carbon dioxide. The process is useful: for sequestering carbon dioxide; for the generation of electrical power, hydrogen, synthesis gas or substitute natural gas; and in a power generation plant.    ADVANTAGE - The process eliminates costly gaseous compression step. The process is a simple process, which largely alleviates negative impact of CO2 capture and export upon the overall costs and thermal efficiencies.    DETAILED DESCRIPTION - Energy conversion process that also exports byproduct carbon dioxide (CO2) at elevated pressure, comprises: (a) mixing a second fuel gas feed stream (12, 56) derived from a first fuel gas stream (10) with a reactant stream (40, 74) and where into at least part of the second fuel gas feed stream and/or the reactant stream, additional CO2 is added through desorption by contacting the stream/streams with a CO2-rich solvent stream (36) in a first stage contactor to produce a mixed feed gas stream and a CO2-lean solvent stream (38); (b) reacting the mixed feed gas stream in a chemical conversion step, where further CO2 is produced; (c) chilling at least part of the products (20) of the chemical conversion step, at a pressure of at least 10 bar to condense and partially remove CO2 as a liquid (34) and thus producing a second stage contactor, where further CO2 is removed, by absorption in a solvent stream lean in CO2 derived from the CO2-lean solvent stream, to produce a product gas stream (50, 58) and a solvent stream rich in CO2 from which the CO2-rich solvent stream is subsequently derived. An INDEPENDENT CLAIM is included for a hybrid process having a first module comprising a chemical conversion step that comprises a carbon monoxide-shift conversion step and a second module comprising a chemical conversion step that comprises a methanation or reforming step, and where at least part of the additional CO2 added through desorption into the second fuel gas stream (18) of the first module is mixed with the second fuel gas stream (12) of the second module.    DESCRIPTION OF DRAWING(S) - The figure shows a block flow diagram, where a hydrogen rich gas is manufactured and combusted in a combined cycle power generation unit.    First fuel gas stream (10)    Second fuel gas feed stream (12, 56)    Reactant stream (40, 74)    Products (20)    Product gas stream. (50, 58)