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OALib Journal期刊
ISSN: 2333-9721
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agcey分子筛吸附剂的制备及性能研究
, PP. 620-627
Keywords: agcey,吸附脱硫,噻吩,苯并噻吩,甲苯
Abstract:
？以nay分子筛为载体,通过液相离子交换法制备了经ag、ce双金属离子改性的agcey吸附剂,并利用uv-vis、xrd、bet、icp、xps和ft-ir技术对吸附剂进行了表征。以噻吩/苯并噻吩/正辛烷/甲苯体系为汽油模拟体系,考察了制备条件和吸附条件对吸附剂脱硫性能的影响以及吸附剂再生性能。结果表明,agcey吸附剂上ag、ce这两种金属元素分别以ag+、ce4+形式存在,agcey吸附剂具有类似于agy的高的脱硫性能,又具有类似于cey的高的吸附选择性,agcey对噻吩(tp)和苯并噻吩(bt)的吸附选择性顺序为bt>tp;最适宜的制备条件为先交换ag后交换ce离子、离子交换24h、ce/ag物质的量比为2.5、500℃焙烧;在原料20ml、agcey吸附剂用量0.2g、吸附温度50℃、吸附时间60min下,噻吩脱硫率可达到59.0%,苯并噻吩脱硫率达到96.5%。
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