主要研究了金属离子交换分子筛对有机硫化物苯并噻吩和二苯并噻吩的吸附.首先通过液相离子交换法对商品的Na(Ⅰ)/Y分子筛进行改性,分别制备了5种过渡金属离子的Y型分子筛Ag(Ⅰ)/Y、Ni(Ⅱ)/Y、Zn(Ⅱ)/Y、Cu(Ⅱ)/Y和Fe(Ⅲ)/Y,用静态吸附法测定了苯并噻吩和二苯并噻吩分别在6种Y型分子筛上的吸附等温线,应用软硬酸碱理论分析和讨论了其吸附能力的差异.结果表明: Na(Ⅰ)/Y对苯并噻吩有吸附,而对二苯并噻吩无吸附作用;a(Ⅰ)/Y分子筛经离子交换Ag+、Ni2+、Zn2+、Cu2+、Fe3+后,其吸附苯并噻吩和二苯并噻吩的能力得到了不同程度的提高,其中交换软酸离子的Ag(Ⅰ)/Y其吸附容量增加最多,交换交界酸的Ni(Ⅱ)/Y、Zn(Ⅱ)/Y、Cu(Ⅱ)/Y次之,而交换硬酸的Fe(Ⅲ)/Y增加最少.这表明,当Na(Ⅰ)/Y分子筛上分别离子交换以上5种软酸性大于Na+的金属离子时,所得到的改性分子筛其对苯并噻吩和二苯并噻吩的吸附容量均增强.同时,这种吸附能力的大小顺序基本上与这些离子的绝对硬度η成反比.
参考文献
| [1] | Babich I V;Moulijn J A .[J].FUEL,2003,82:607-631. |
| [2] | 郑嘉惠.清洁燃料生产技术评述[J].当代石油石化,2003(01):4-9. |
| [3] | 余谟鑫,李忠,夏启斌,王书文.活性炭表面热氧化对其吸附二苯并噻吩性能的影响[J].化工学报,2007(04):938-943. |
| [4] | Kim J H;Ma X L;Zhou A et al.[J].Catalysis Today,2006,111:74-83. |
| [5] | Wang YH;Yang RT .Desulfurization of liquid fuels by adsorption on carbon-based sorbents and ultrasound-assisted sorbent regeneration[J].Langmuir: The ACS Journal of Surfaces and Colloids,2007(7):3825-3831. |
| [6] | Haji S;Erkey C .[J].Industrial and Engineering Chemistry Research,2003,42:6933-6937. |
| [7] | Zhou A;Ma X L;Song C S .[J].Journal of Physical Chemistry B,2006,110:4699-4707. |
| [8] | Yang RT.;Hernandez-Maldonado AJ.;Yang FH. .Desulfurization of transportation fuels with zeolites under ambient conditions[J].Science,2003(5629):79-81. |
| [9] | Velu S;Ma X L;Song C S .[J].Industrial and Engineering Chemistry Research,2003,42:5293-5304. |
| [10] | Velu, S;Song, CS;Engelhard, MH;Chin, YH .Adsorptive removal of organic sulfur compounds from jet fuel over K-exchanged NiY zeolites prepared by impregnation and ion exchange[J].Industrial & Engineering Chemistry Research,2005(15):5740-5749. |
| [11] | Laborde-Boutet C;Joly G;Nicolaos A;Thomas M;Magnoux P .Selectivity of thiophene/toluene competitive adsorptions onto NaY and NaX zeolites[J].Industrial & Engineering Chemistry Research,2006(20):6758-6764. |
| [12] | Yang R T.Adsorbents:Fundamentals and Applications[M].USA:Wiley-Interscience,2003 |
| [13] | Ho T L .[J].Chemical Reviews,1975,75(01):1220. |
| [14] | Parr R G;Pearson R G .[J].Journal of the American Chemical Society,1983,105:7512-7516. |
| [15] | Pearson R G .[J].Inorganica Chimica Acta,1995,240:93-98. |
| [16] | Yu M X;Li Z;Xi H X et al.[J].Chemical Engineering Journal,2007,132:233-239. |
| [17] | Pearson R G .[J].Journal of the American Chemical Society,1963,85:3533-3539. |
| [18] | 王进贤,刘占祥,胡雨来.酸碱软硬度的新标度研究[J].西北师范大学学报(自然科学版),2001(02):95-99. |
| [19] | Putz M V;Russo N;Siclia E .[J].Journal of Computational Chemistry,2004,25:994-1003. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%