对经过程序升温表面甲烷无氧芳构化反应后的Mo/HZSM-5催化剂上的积炭进行程序升温加氢反应和程序升温二氧化碳反应,并对相应的催化剂上的积炭进行程序升温氧化反应和热重实验,以研究催化剂上的不同积炭物种. 结果表明,甲烷无氧芳构化反应后有两类烧炭峰,一类是低温烧炭峰,另一类是高温烧炭峰;H2主要对高温烧炭峰发生作用,对低温烧炭峰几乎没有影响;CO2可同时对两种烧炭峰产生影响. 由此推论,甲烷在无氧条件下直接转化生成芳烃的反应过程中,沉积在Mo/HZSM-5催化剂上的积炭有三种形式,即: 能够与H2反应的积炭,能够与CO2反应的积炭和可能以Mo2C形式存在的物种.
参考文献
| [1] | Wang L Sh;Tao L X;Xie M S .[J].Catalysis Letters,1993,21(1-2):35. |
| [2] | Xu Y D;Lin L W .[J].Applied Catalysis A:General,1999,188(1-2):53. |
| [3] | 舒玉瑛 .[D].中国科学院大连化学物理研究所(博士学位论文,2000. |
| [4] | 吕元 .[D].大连:中科院大连化学物理研究所,1999. |
| [5] | Weckhuysen BM.;Lunsford JH.;Rosynek MP. .Characterization of surface carbon formed during the conversion of methane to benzene over Mo/H-ZSM-5 catalysts[J].Catalysis Letters,1998(1/2):31-36. |
| [6] | Chen LY.;Xu ZS.;Li XS.;Zhang T.;Lin LW. .DEHYDRO-OLIGOMERIZATION OF METHANE TO ETHYLENE AND AROMATICS OVER MOLYBDENUM/HZSM-5 CATALYST[J].Journal of Catalysis,1995(1):190-200. |
| [7] | Jiang H.;Cui W.;Xu YD.;Wang LS. .Study on the induction period of methane aromatization over Mo/HZSM-5: partial reduction of Mo species and formation of carbonaceous deposit[J].Catalysis Letters,1999(3):95-102. |
| [8] | Shu YY.;Wong ST.;Wang LS.;Guo XX.;Xu YD. .PROMOTIONAL EFFECT OF RU ON THE DEHYDROGENATION AND AROMATIZATION OF METHANE IN THE ABSENCE OF OXYGEN OVER MO/HZSM-5 CATALYSTS[J].Journal of Catalysis,1997(1):11-19. |
| [9] | Solymosi F.;Oszko A.;Bugyi L. .Formation and reactions of CH3 species over Mo2C/Mo(111) surface[J].Catalysis Letters,1999(3):103-107. |
| [10] | Ohnishi R;Liu Sh T;Dong Q .[J].Journal of Catalysis,1999,182(01):92. |
| [11] | Jiang H.;Cui W.;Xu YD.;Wang LS. .Study on the induction period of methane aromatization over Mo/HZSM-5: partial reduction of Mo species and formation of carbonaceous deposit[J].Catalysis Letters,1999(3):95-102. |
| [12] | Solymosi F.;Oszko A.;Bugyi L. .Formation and reactions of CH3 species over Mo2C/Mo(111) surface[J].Catalysis Letters,1999(3):103-107. |
| [13] | Weckhuysen BM.;Lunsford JH.;Rosynek MP. .Characterization of surface carbon formed during the conversion of methane to benzene over Mo/H-ZSM-5 catalysts[J].Catalysis Letters,1998(1/2):31-36. |
| [14] | Wang L Sh;Tao L X;Xie M S .[J].Catalysis Letters,1993,21(1/2):35. |
| [15] | Shu YY.;Wong ST.;Wang LS.;Guo XX.;Xu YD. .PROMOTIONAL EFFECT OF RU ON THE DEHYDROGENATION AND AROMATIZATION OF METHANE IN THE ABSENCE OF OXYGEN OVER MO/HZSM-5 CATALYSTS[J].Journal of Catalysis,1997(1):11-19. |
| [16] | Ohnishi R;Liu Sh T;Dong Q .[J].Journal of Catalysis,1999,182(01):92. |
| [17] | Chen LY.;Xu ZS.;Li XS.;Zhang T.;Lin LW. .DEHYDRO-OLIGOMERIZATION OF METHANE TO ETHYLENE AND AROMATICS OVER MOLYBDENUM/HZSM-5 CATALYST[J].Journal of Catalysis,1995(1):190-200. |
| [18] | 吕元 .[D].大连:中科院大连化学物理研究所,1999. |
| [19] | Xu Y D;Lin L W .[J].Applied Catalysis A:General,1999,188(1-2):53. |
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%