Process for producing hydrofluoroolefin

A process for producing a hydrofluoroolefin (HFO), the process comprising: a step in which a hydrofluorocarbon represented by formula (1) is converted to a hydrofluoroolefin represented by formula (2) in the presence of carbon dioxide to obtain a first gas composition comprising the HFO and the carbon dioxide; and a step in which the carbon dioxide is separated from the first gas composition to obtain a second gas composition comprising the HFO. CR 1 R 2 X 1 CR 3 R 4 X 2 (1) CR 1 R 2 =CR 3 R 4 (2) (In formulae (1) and (2), R 1 to R 3 are each independently a hydrogen atom or a fluorine atom and R 4 is a hydrogen atom, a fluorine atom, CH 3 , CH 2 F, CHF 2 , or CF 3 , the total number of fluorine atoms in R 1 to R 4 being 1 or larger and the total number of hydrogen atoms in R 1 to R 4 being 1 or larger; and X 1 and X 2 are each a hydrogen atom or a fluorine atom, provided that when X 1 is a hydrogen atom, then X 2 is a fluorine atom and when X 1 is a fluorine atom, then X 2 is a hydrogen atom.)