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OALib Journal期刊
ISSN: 2333-9721
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苯并噻吩在酸改性nay分子筛上的吸附
, PP. 116-121
Keywords: nay分子筛,苯并噻吩,柠檬酸,磷酸,吸附,再生
Abstract:
？以nay分子筛为母体,通过柠檬酸、磷酸改性分别得到吸附剂nay-c和nay-p.采用sem、xrd、xrf、n2物理吸附及nh3-tpd表征可知,柠檬酸改性后得到的nay-c吸附剂介孔表面积增加,分子筛骨架结构保持不变.同时,磷酸改性使得nay分子筛表面弱酸量减少强酸量增加,改性后所得吸附剂nay-p的强酸量大于nay-c.吸附实验表明,nay-c和nay-p均可完全脱除模拟油品中的苯并噻吩,同时nay-c吸附剂对0#柴油的脱硫能力优于nay-p吸附剂.再生实验中nay-c和nay-p吸附剂对模拟油品的脱硫率由第一次的100%分别下降至第6次的91.97%和85.96%.由此可知,柠檬酸改性nay分子筛所得nay-c吸附剂的脱硫能力优于nay-p,原因是吸附剂上的介孔更易于发生吸附脱硫.
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