| 含铜类水滑石催化材料热分解过程的研究 |
| Study on the Thermal Decomposition of a Copper ContainingHydrotalcite like Catalytic Material |
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| 摘要: 共沉淀法合成了Cu0.13Mg0.6Al0.27(OH)2(CO3)0.135·xH2O类水滑石物质(CuHTlc),采用XRD、DTA-TG、BET、TEM和27AlMASNMR技术对其热分解过程进行了表征。结果表明,在较低焙烧温度时(低于300℃),氢氧根和层间水部分脱除,但水滑石仍保持其层状结构;500℃时,其层状结构被完全破 |
| 关键词: 类水滑石物质 热分解 焙烧温度 |
| 基金项目: |
| Abstract: The hydrotalcite like compound Cu0.13Mg0.6Al0.27(OH)2(CO3)0.135·xH2O (CuHTlc) are synthesized by coprecipitation method and are characterized by XRD, DTA-TG, BET, TEM and 27Al MAS NMR. The results show that at relatively low calcination temperatures (below 300℃), the layer structure of CuHTlc is retained, although partial dehydroxylation in addition to dehydration occurs. At 500℃, the hydrotalcite structure is destroyed and MgO phase appears,the spinel phase forms with the further increase of calcination temperature. CuHTlc calcined at 500℃ has the highest surface area (193m2·g-1). When CuHTlc are calcined above 500℃, the composition of resusting products is Cu0.13Mg0.6Al0.27O0.135, the equation of thermal decoposition of CuHTlc can be expressed as following:Cu0.13Mg0.6Al0.27(OH)2(CO3)0.135·xH2O →Cu0.13Mg0.6Al0.27O0.135 +(1+x)H2O +0.135CO2. |
| Keywords: hydrotalcite like compound thermal decomposition calcination temperature |
| 投稿时间：1999-04-12 修订日期：1999-06-21 |
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| 温斌,何鸣元,宋家庆,宗保宁,路勇.含铜类水滑石催化材料热分解过程的研究[J].无机化学学报,2000,16(1):58-62. |
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