摘要
考察了淬速,二次熔炼、熔融时间和加盐对SbSn材料的结构和脱硫性能的影响。结果表明,在电压30 V,电流400 A的条件下,随着淬速的提高,三方晶体的成分增加,脱硫性能也随之增加。二次熔炼后提高了熔体的洁净度,在快冷的过程中,结晶的晶核比较少,SbSn材料的结晶度下降,脱硫性能明显降低。随着熔融时间的增加,熔体的均匀程度增加,所以制备出的SbSn材料的结晶度增加,脱硫性能增加。在熔融过程中加入NaCl可以提高SbSn材料的结晶度,同时提高了脱硫性能。以噻吩和乙硫醇为模型化合物初步研究了SbSn材料的脱硫机理,结果表明噻吩类化合物脱硫机理以吸附为主,硫醇类化合物的反应机理以化学反应C—S键断裂为主。
The influence of quench speed, twice melting, melting time and adding NaCl on structures and desulfurization performance of intermetallic compound SbSn was studied. The results show that at the condition of 30 V and 400 A, the composition of trigonal system crystal structure increases and its desulfurization performance is also enhanced with the increase of quench speed; after twice melting, the lustration of melting material is increased, therefore crystalline grain and degree of crystal are decreased and the desulfurization performance becomes worse during rapid cooling. The uniformity of SbSn material is fortified, the desulfurization performance gets better with the increase of melting time. The addition of NaCl could increase the degree of crystal and desulfurization performance during the melting process. Thiophene and ethanethiol were used as model compounds to study the mechanism of desulfurization. The result shows thiophene can be absorbed on the surface of SbSn and the C-S of ethanethiol can be broken in reaction.
出处
《石油化工高等学校学报》
EI
CAS
2007年第1期1-4,共4页
Journal of Petrochemical Universities
基金
江苏省精细化工重点实验室资助项目。
关键词
金属闻化舍物
制备工艺
结构
脱硫
Intermetallic compound
Preparation process
Structure
Desulfurization
