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Four iron-based catalysts supported on niobium oxide (Nb 2 O 5 ) were prepared by impregnation and characterized by TPR, FRX, DRX, and textural analysis. The catalysts were tested in a fixed bed continuous flow unit to convert a mixture of CO 2 and H 2 to hydrocarbons at atmospheric pressure. All catalysts were active in the range of 623-723 K. The selectivity to hydrocarbons and light olefins increases with the use of alkali metal promoters (K or Cs). At 673 K, the Fe-Cr-K/Nb 2 O 5 showed 26%doi:10.3389/fenrg.2019.00049 fatcat:3x66rtihgbaatnnvooddgcycxe