Single-companent catalysts for the synthesis of mixture H2 and CO from natural gas- methane

Abstract

One-component catalysts based on oxides (NiO, Co₂O₃ and MoO₃) supported on various supports (θ-Al₂O₃, γ-Al₂O₃, 5A, 4A, 3A, 13X, HY, and HZSM-5) have been studied in the reaction of carbon dioxide conversion of methane to synthesis gas. The optimal composition of a catalyst based on nickel oxide with a support content of 3 wt%, cobalt oxide – 15 wt% and molybdenum oxide – 10 wt% was determined. The effect of preparation methods on the activity of an effective 3 wt% NiO/γ-Al₂O₃ catalyst in the reaction of carbon dioxide conversion of methane to H₂ and CO was studied. For a nickel catalyst with a low content of the active phase, an efficient preparation method was chosen (the method of capillary impregnation of the support in terms of moisture capacity). On an effective 3 wt.% NiO/γ-Al₂O₃ under the reaction conditions СН₄: СО₂ = 1: 1, T_r – 800 ⁰С, W = 1500 h^-1, the values of conversion and yield of the target products are: Х_СН4 – 89%, Х_СО2 – 93%, C (H₂) – 45.4%, C (CO) – 42.4%.