One-Pot Conversion of Cellulose into n -Hexane over the Ir-ReO x /SiO 2 Catalyst Combined with HZSM-5

One-pot conversion of cellulose to n -hexane was carried out over the Ir-ReO x /SiO 2 (Re/Ir = 2) catalyst combined with HZSM-5 as cocatalyst in a biphasic reaction system ( n -dodecane + H 2 O). The yield of n -hexane reached 83% from ball-milled cellulose and 78% from microcrystalline cellulose. Even using a high weight ratio of cellulose to water (1:1), a 71% yield of n -hexane could be obtained from ball-milled cellulose. The yield of n -hexane was almost maintained during three repeated tests when the catalyst was calcined again. The transformation of cellulose to n -hexane consists of the hydrolysis of cellulose to glucose via water-soluble oligosaccharides, hydrogenation of glucose to sorbitol, and successive hydrogenolysis of sorbitol to n -hexane. The Ir-ReO x /SiO 2 catalyst promotes a hydrogenation and hydrogenolysis step. HZSM-5 enhanced the hydrolysis of cellulose in hot water and C–O bond hydrogenolysis activity of the Ir-ReO x /SiO 2 catalyst.