Desulfurization of Diesel over Ni/ZnO Adsorbent Prepared by Coprecipitation

Abstract

Ni/ZnO adsorbents with various Ni/Zn molar ratios were prepared by coprecipitation; their adsorption capacity in reactive adsorption desulfurization (RADS) of diesel oil was investigated. Ni/ZnO exhibits much higher adsorption performance than pure Ni and pure ZnO. The Ni content plays a crucial role in determining RADS activity over Ni/ZnO; the sulfur capacity depends on the ZnO content in Ni/ZnO. The Ni₄/Zn₆ adsorbent shows the optimal performance; the sulfur content in diesel oil is reduced to less than 5 ppm in first 60 h and less than 15 ppm in next 68 h.