Influences of egg white-egg yolk MnO2-NiO/γ-Al2O3 catalytic activity on the desulfurization performance

Abstract

This paper used an equal volume impregnation method to produce egg yolk-egg white bimetallic-supported catalyst. Phase structure and crystal morphologies were characterized by X-ray diffraction, scanning electron microscopy, temperature programmed reduction (TPR), and inductive coupling plasma methods, and the paper discussed the effect of different metal loading, calcination temperature, and calcination time on the desulfurization activity. The experimental results showed that desulfurization performance increased first and then gradually decreased as metal loading, calcination temperature, and calcination time increased. The optimum preparation conditions of bimetallic catalyst were 8% NiO and 5% MnO2, the most suitable calcination temperature was 400°C, and the most suitable calcination time was 4 h. Finally, the eggshell, the egg white, and the egg yolk catalysts had its own different characteristics in the desulfurization processing: the eggshell catalyst showed a rapid reaction rate but lasted for a short time, the egg yolk catalyst showed a slow reaction rate but lasted for a long time, and the reaction rate and lasting time of the egg white were between the eggshell and the egg yolk.

Keywords

• catalytic activity
• desulfurization
• egg white-egg yolk catalyst
• γ-al2o3