NGHIÊN CỨU PHẢN ỨNG METAN HÓA CO2, TRÊN XÚC TÁC NiO GẮN TRÊN CÁC CHẤT MANG KHÁC NHAU

Abstract

NiO loaded on different carries catalysts were prepared by loading Ni(No₃) ₂ .6H₂O on many response carries y-Al₂O₃ , TiO2, SiO₂, 30%y-Al₂O₃, + 70%SiO₂. The physico-chemical properties of synthesized catalyst were characterized by BET, TPR, XRD and SEM methods. Catalyst activities were tested in methanation of carbon dioxide by hydrogen micro steam method. The results demonstrated that NiO/y-Al₂O₃ catalysts appear more CO₂ conversion than NiO/other carriers. Especially, when catalyst modified by CaO, Li₂O, CeO₂ the activity increased.

NiO/y-Al₂O₃ catalysts got high activity for methanation of CO and CO2 mixture. NiO/y-Al₂O₃, catalysts were very stable high CO, CO₂ conversion rate and excellent CH₄ selectivity. Among the studied catalyst 37.7%NiO+0.3%Li₂O/y -Al₂O₃, was the best one for CO₂ methanation and mixture of CO and CO₂ methanation. This catalyst has high potential for application.

Key works: Catalyst, NiO/y-Al₂O₃, methanation, mixture, conversion.