以硅酸钠为原料,以大孔Al2O3为基载体,采用水解沉积法制备了SiO2-Al2O3复合载体. 进而以非晶态镍基合金为前驱体,在低温下通过PH3处理制备了Ni2P/SiO2-Al2O3催化剂. 用X射线衍射、红外光谱、扫描电镜、电感耦合等离子体发射光谱和N2吸附技术对复合载体和催化剂进行了表征,并以4,6-二甲基二苯并噻吩为探针在小型连续流动固定床反应器上考察了催化剂的加氢脱硫性能. 结果表明,在γ-Al2O3载体表面引入SiO2能够明显减少γ-Al2O3表面四配位的Al3+离子,从而减弱Ni2P/SiO2-Al2O3催化剂中Ni2P和γ-Al2O3载体表面的强相互作用. 加入适量的SiO2后, SiO2-Al2O3复合载体仍能保持大孔γ-Al2O3载体孔结构的优势. 在实验范围内, Ni2P/SiO2-Al2O3催化剂表现出很好的加氢脱硫性能.
参考文献
[1] | 刘武灿,何兴娇,卢春山.金属氮化物/碳化物催化剂加氢性能研究进展[J].工业催化,2005(03):1-5. |
[2] | 魏昭彬,赵秀阁,辛勤.双组分过渡金属氮化物催化剂Ⅱ.催化性能[J].催化学报,2000(04):305-308. |
[3] | Oyama ST. .Novel catalysts for advanced hydroprocessing: transition metal phosphides[J].Journal of Catalysis,2003(1/2):343-352. |
[4] | Sun FX;Wu WC;Wu ZL;Guo J;Wei ZB;Yang YX;Jiang ZX;Tian FP;Li C .Dibenzothiophene hydrodesulfurization activity and surface sites of silica-supported MoP, Ni2P, and Ni-Mo-P catalysts[J].Journal of Catalysis,2004(2):298-310. |
[5] | 李翠清,李凤艳,孙桂大,李成岳,王洪学,麴永亮.助剂镍/钴对磷化钨催化剂加氢精制性能的影响[J].分子催化,2005(01):22-26. |
[6] | 王远强,余夕志,陈长林,徐南平,王延儒.Ni2P/TiO2对甲苯的催化加氢反应性能[J].高校化学工程学报,2005(05):625-629. |
[7] | Wang A J;Ruan L F;Teng Y;Li X Lu M H Ren J Wang Y Hu Y K .[J].Journal of Catalysis,2005,229(02):314. |
[8] | Yang S F;Liang C H;Prins R .[J].Journal of Catalysis,2006,237(01):118. |
[9] | 孙福侠,魏昭彬,应品良,孙秀萍,蒋宗轩,田福平,杨永兴,李灿.一种新型高活性加氢脱硫催化剂:二氧化硅担载的磷化镍[J].催化学报,2004(09):685-687. |
[10] | Shu Y Y;Lee Y-K;Oyama S T .[J].Journal of Catalysis,2005,236(01):112. |
[11] | Sawhill SJ;Layman KA;Van Wyk DR;Engelhard MH;Wang C;Bussell ME .Thiophene hydrodesulfurization over nickel phosphide catalysts: effect of the precursor composition and support[J].Journal of Catalysis,2005(2):300-313. |
[12] | Wu Zh J;Zhang M H;Ge Sh H;Zhang Zh L Li W Tao K Y .[J].Journal of Materials Chemistry,2005,15(46):4928. |
[13] | 王志明,王昊.Al2O3-SiO2溶胶的红外吸收光谱分析[J].玻璃纤维,2000(01):6-8. |
[14] | Tarte P .[J].SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,1967,23(07):2127. |
[15] | He Y G;Qiao M H;Hu H R;Pei Y Li H X Deng J F Fan K N .[J].Materials Letters,2002,56(06):952. |
[16] | Abu II;Smith KJ .The effect of cobalt addition to bulk MoP and Ni2P catalysts for the hydrodesulfurization of 4,6-dimethyldibenzothiophene[J].Journal of Catalysis,2006(2):356-366. |
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%