用水热合成法制备了锰取代的六铝酸盐催化剂,并比较了超临界干燥法和普通烘箱干燥法对催化剂结构及甲烷燃烧反应活性的影响. DTA-MS 结果表明,超临界干燥过程中,催化剂前驱物中的表面铝羟基部分被乙氧基取代. 这种表面修饰作用可保持铝分散的均匀性,使催化剂前驱物中碳酸锰和碳酸镧的分解温度明显降低,且氢氧化铝的脱水温度维持在较适宜的范围内; 焙烧后,易形成六铝酸盐相. 甲烷燃烧反应结果表明,用超临界干燥方法制得的催化剂对甲烷燃烧反应的催化活性明显高于用普通烘箱干燥方法制得的催化剂.
参考文献
| [1] | McCarty J G .[J].Nature,2000,403(6765):35. |
| [2] | Betta R A D .[J].Catalysis Today,1997(35):129. |
| [3] | Ahlstrm-Silversand A F;Odenbrand C U I .[J].Applied Catalysis A:General,1997,153:157. |
| [4] | Johansson E M;Danielsson K M J;Pocoroba E .[J].Applied Catalysis A:General,1999,182:199. |
| [5] | Machida M;Eguchi K;Arai H .[J].Journal of Catalysis,1989,120(02):377. |
| [6] | Machida M;Eguchi K;Arai H .[J].Journal of Catalysis,1990,123(02):477. |
| [7] | Zarur AJ.;Ying JY.;Hwu HH. .Reverse microemulsion-mediated synthesis and structural evolution of barium hexaaluminate nanoparticles[J].Langmuir: The ACS Journal of Surfaces and Colloids,2000(7):3042-3049. |
| [8] | Arai H;Machida M .[J].Applied Catalysis A:General,1996,138:161. |
| [9] | 张立德;牟季美.纳米材料和纳米结构[M].北京:科学出版社,2001:143. |
| [10] | Mizushima Y.;Hori M. .ALUMINA AEROGEL CATALYSTS PREPARED BY TWO SUPERCRITICAL DRYING METHODS USED IN METHANE COMBUSTION[J].Journal of Materials Research,1995(6):1424-1428. |
| [11] | Zhang H M;Teraoka Y;Yamazoe N.[J].Chemistry Letters,1987(04):665. |
| [12] | Rouessac V.;Provost J.;Desgardin G.;Wang J. .RAPID SYNTHESIS OF THE BI(PB)-2223 110 K SUPERCONDUCTOR BY THE EDTA SOL-GEL METHOD[J].Journal of Materials Science,1996(13):3387-3390. |
| [13] | Zarur AJ.;Ying JY. .Reverse microemulsion synthesis of nanostructured complex oxides forcatalytic combustion[J].Nature,2000(6765):65-67. |
| [14] | Zwinkels M F M;Jras S G;Menon P G;Griffin T A .[J].Catalysis Review-Science and Engineering,1993,35(03):319. |
| [15] | Machida M;Sato A;Kijima T .[J].Catalysis Today,1995(26):239. |
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%