The effect of Fe(2)O(3) crystal phases on CO(2) hydrogenation

The effect of Fe(2)O(3) crystal phases on their performance in CO(2) hydrogenation was studied. α-Fe(2)O(3) crystal was prepared by precipitation method from Fe(NO(3))(3)·9H(2)O and (NH(4))(2)CO(3), and γ-Fe(2)O(3) was prepared by grinding Fe(NO(3))(3)·9H(2)O and L(+)-Tartaric acid in agate mortar completely. The crystal phases of Fe(2)O(3) influence the distribution of promoter Zn, K and Cu on catalysts. The dispersity of K on γ-Fe(2)O(3) surface is higher than α-Fe(2)O(3). On the contrary, Cu and Zn are more dispersive on α-Fe(2)O(3) surface than γ-Fe(2)O(3). The catalyst in γ-Fe(2)O(3) phase is easily reduced relative to the catalyst in α-Fe(2)O(3) phase. The former presents higher CO(2) conversion and C(2)+ hydrocarbon selectivity than the latter in CO(2) hydrogenation.