CAJ | 학술논문

以Al2 O3为载体采用等体积分步浸渍法制备了NiMo／Al2 O3催化剂，在固定床反应器上研究了在相对较低的温度（200℃）条件下，烯烃的加入对甲基叔丁基硫醚的加氢转化的影响。实验结果表明，烯烃与硫醚在催化剂表面发生竞争吸附，其加入对硫醚的转化有明显的抑制作用。采用SEM电镜，S、C元素分析和X射线光电子能谱对催化剂的表面组成及形态进行表征，发现烯烃使得催化剂表面出现明显的颗粒聚集和结块现象，积碳量增加；同时，导致Ni向催化剂的表面迁移，M o4＋／M o6＋比值减小，N i0／N i2＋比值增大，这均在一定程度上减弱了催化剂的活性。
이Al2 O3위재체채용등체적분보침지법제비료NiMo／Al2 O3최화제，재고정상반응기상연구료재상대교저적온도（200℃）조건하，희경적가입대갑기숙정기류미적가경전화적영향。실험결과표명，희경여류미재최화제표면발생경쟁흡부，기가입대류미적전화유명현적억제작용。채용SEM전경，S、C원소분석화X사선광전자능보대최화제적표면조성급형태진행표정，발현희경사득최화제표면출현명현적과립취집화결괴현상，적탄량증가；동시，도치Ni향최화제적표면천이，M o4＋／M o6＋비치감소，N i0／N i2＋비치증대，저균재일정정도상감약료최화제적활성。
Using Al2 O3 as the support ,the NiMo/Al2 O3 catalyst was prepared by incipient wetness impregnation method . The effect of olefin on tert‐butyl methyl sulfide hydro‐conversion was re‐searched in fixed bed reactor at relative low temperature of 200 ℃ over NiMo/Al2 O3 catalyst .The re‐sult showed that the added olefine reduced conversion of thioether significantly because of competitive adsorption in the surface of catalyst .The surface composition and morphology of catalyst samples were characterized by scanning electron microscope ,sulfur and carbon element analysis and X‐ray photoelectron spectroscopy .The results indicated that the added olefin made catalyst surface appea‐ring obvious particles aggregation ,agglomeration and carbon deposition ;and it resulted in Ni migra‐tion to the surface of the catalyst ,decrease of Mo4+ /Mo6+ and increase of Ni0/Ni2+ ,which could re‐duce the activity of the catalyst in a certain degree .