Influence of preparation conditions on formation of crystalline phases of nickel sulfide

摘要

Nickel sulfide catalysts obtained by homogeneous precipitation were prepared by varying the homogenization time and the sulfating temperature. The surface area with respect to preparation conditions was studied by the BET method. Structure characterization studies by X-ray diffraction showed the formation of two main crystalline phases (NiS_1.03 and NiS-millerite). Their appearance depends on preparation conditions. Formation of millwright or NiS_1.03 occurs at the constant sulfating temperature, when time of homogenization of precursors increases.