Mechanical Alloying Preparation And Desulfurization Property Of SbSn Intermetallic Compound

With the increase of environment pollution from tail gas of vehicles, decrease of sulfur content in gasoline becomes more and more important. In recent years, it was reported that SbSn intermetallic compound could remove sulfur from oil under room temperature and ambient pressure because of its special surface micro-structure and function. The desulfurization performance of the SbSn indicates a new research field.This study focused on the preparation of SbSn intermetallic compound by mechanical alloying, and NaCl or third metal (denoted as A hereinafter) was added during the process of ball milling for increasing the surface area of the SbSn. The analysis and characterization of SbSn were carried out with the aid of modern analytical techniques, including XRD,SEM,BET etc. SbSn was used to remove the sulfur compound of the gasoline emulsion. The following results have been obtained.(1) NaCl or A was added during the process of mechanical alloying (MA) of SbSn intermetallic compound, and they were removed by washing using neutral water and non-neutral water respectively. Several parameters that affect the preparation of SbSn were investigated respectively. The results showed that the higher the content of the NaCl or A was, the longer of the time needed to synthesize the SbSn; The size of SbSn decreased with the milling time increased; With the increase of content of NaCl or A, the surface area of SbSn would increase. The surface area of SbSn was 15.7m2/g when the 20%NaCl was added, and the surface area of it was 74.4 m2/g when 20%A added. While the surface area of SbSn being prepared without any additive was only about 1m~2/g.(2) Several parameters which affected efficiency of desulfurization were investigated and compared through static desulfurization processes, including content of NaCl, milling time, ratio of SbSn to oil and desulfurization time. The experimental results show that the optimum desulfurization efficiency was 18.5% when the content of NaCl was 15%, milling time was 12 hours, desulfurization time was 14 hours and ratio of SbSn to oil was 0.4, in contrast to the desulfurization efficiency being 7.0% while SbSn being prepared without any additives.