Preparation of a Novel Active Fischer–Tropsch Co–Ni Catalyst Derived from Metal-Organic Framework

Abstract

In the present study, a typical metal-organic framework has been employed for preparation of a novel active Fischer–Tropsch Co–Ni catalyst. Co–Ni catalyst was prepared by glycine–MOF combustion method and was heated in a tube furnace (2°C min^–1) under air at 750°C for 6 h. Scanning electron micrograph of metal-organic framework shows regularly cubic shaped crystals and they were being deformed into a low density, loose and porous material after it was calcined in the tube furnace. BET surface area and pore volume are 276 m²/g and 0.31 cm³/g respectively. This active catalyst showed selectivity for long-chain hydrocarbons $\left( {{\text{C}}_{5}^{ + }} \right)$ of ~52% and for short-chain hydrocarbons (C₂–C₄) 30%. The relatively high activity (TOF of 2.08 s^–1 at 340°C) was ascribed to its high porous structure and large pore size of the catalyst which facilitated the diffusion of hydrocarbons. The unique features of this catalyst, including structural tailor ability such as high surface area, porosity, homogeneity and stability enable it to be an active Fischer–Tropsch catalyst.