在Pd/CeO2/γ-Al2O3中进一步添加La2O3,并考察了其催化甲醇分解性能. 结果表明: La2O3的加入抑制了副产物二甲醚的生成;随着La2O3含量的增加,催化剂活性先降低后升高,w(La2O3)=10%时甲醇转化率达到极大值(约91.4% ). XRD,BET,NH3-TPD,XPS,H2-TPR和FT-IR等表征结果表明: La2O3自身在γ -Al2O3载体上的分散性很好,并且促进了CeO2在γ-Al2O3载体上的分散及其体相氧的还原,使Pd的分散度进一步提高,并使Pd和CeO2之间的相互作用进一步增强,从而提高了催化剂催化甲醇分解的活性.
参考文献
[1] | 杨成,任杰,孙予罕.CeO2和La2O3改性Pd/γ-Al2O3甲醇低温分解催化剂的研究Ⅰ.CeO2改性Pd/γ-Al2O3催化剂的结构和性能[J].催化学报,2001(03):283-286. |
[2] | Matsumura Y;Okumura M;Usami Y .[J].Catalysis Letters,1997,44(3-4):189. |
[3] | Tan Y Sh;Dou L Q;Lu D Sh .[J].Journal of Catalysis,1991,129(02):447. |
[4] | Miki T;Ogawa T;Haneda M .[J].Journal of Physical Chemistry,1990,94(16):6464. |
[5] | Groppi G;Cristiani C;Lietti L .[J].Catalysis Today,1999,50(02):399. |
[6] | Monteiro R d S;Noronha F B;Dieguez L C .[J].Applied Catalysis A:General,1995,131(01):89. |
[7] | Fuentes S;Bogdanchikova N;Avalos-Borja M .[J].Catalysis Today,2000,55(03):301. |
[8] | Hicks R F;Bell A T .[J].Journal of Catalysis,1985,91(01):104. |
[9] | Rieck J S;Bell A T .[J].Journal of Catalysis,1985,96(01):88. |
[10] | Binet C;Daturi M;Lavalley J-C .[J].Catalysis Today,1999,50(02):207. |
[11] | Graham G W;Schmitz P J;Usmen R K .[J].Catalysis Letters,1993,17(1-2):175. |
[12] | Usami Y;Kagawa K;Kawazoe M.[A].Amsterdam:Elsevier,1998:83. |
[13] | Matsumura Y;Okumura M;Usami Y .[J].Catalysis Letters,1997,44(3-4):189. |
[14] | Graham G W;Schmitz P J;Usmen R K .[J].Catalysis Letters,1993,17(1/2):175. |
[15] | Binet C;Daturi M;Lavalley J-C .[J].Catalysis Today,1999,50(02):207. |
[16] | Groppi G;Cristiani C;Lietti L .[J].Catalysis Today,1999,50(02):399. |
[17] | Fuentes S;Bogdanchikova N;Avalos-Borja M .[J].Catalysis Today,2000,55(03):301. |
[18] | Usami Y;Kagawa K;Kawazoe M.[A].Amsterdam:Elsevier,1998:83. |
[19] | 杨成,任杰,孙予罕.CeO2和La2O3改性Pd/γ-Al2O3甲醇低温分解催化剂的研究Ⅰ.CeO2改性Pd/γ-Al2O3催化剂的结构和性能[J].催化学报,2001(03):283-286. |
[20] | Miki T;Ogawa T;Haneda M .[J].Journal of Physical Chemistry,1990,94(16):6464. |
[21] | Tan Y Sh;Dou L Q;Lu D Sh .[J].Journal of Catalysis,1991,129(02):447. |
[22] | Hicks R F;Bell A T .[J].Journal of Catalysis,1985,91(01):104. |
[23] | Rieck J S;Bell A T .[J].Journal of Catalysis,1985,96(01):88. |
[24] | Monteiro R d S;Noronha F B;Dieguez L C .[J].Applied Catalysis A:General,1995,131(01):89. |
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%