引用本文:
许峥, 张鎏, 张继炎, 徐亦飞, 王道宏. NiO-La2O3-Al2O3气凝胶催化剂的制备[J]. 应用化学,
2000, 17(4): 366-370.
Citation: XU Zheng, ZHANG Liu, ZHANG Ji-Yan, XU Yi-Fei, WANG Dao-Hong. Preparation of NiO-La2O3-Al2O3 Aerogel Catalyst[J]. Chinese Journal of Applied Chemistry, 2000, 17(4): 366-370.
Citation: XU Zheng, ZHANG Liu, ZHANG Ji-Yan, XU Yi-Fei, WANG Dao-Hong. Preparation of NiO-La2O3-Al2O3 Aerogel Catalyst[J]. Chinese Journal of Applied Chemistry, 2000, 17(4): 366-370.
NiO-La2O3-Al2O3气凝胶催化剂的制备
摘要:
采用改进的溶胶-凝胶法和超临界干燥技术制备出超细三元NiO-La2O3-Al2O3气凝胶催化剂.通过BET、TEM、XRD、DTA、IR等物性表征,考察了煅烧温度和组成等对气凝胶催化剂制备的影响.结果表明,此种方法制备的多元气凝胶催化剂不仅保留了氧化铝和NiO-Al2O3气凝胶的主要特征,而且,氧化镧的加入使气凝胶更易晶化,热稳定性更好和吸附能力更强.这种改进的溶胶-凝胶法和超临界干燥技术操作简单有效,适合要求组分之间相互作用强、分布均匀、结构热稳定性好的多组元负载催化剂的制备.
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关键词:
- NiO-La2O3-Al2O3气凝胶
- / 催化剂
- / 制备
- / 溶胶-凝胶法
- / 超临界干燥技术
English
Preparation of NiO-La2O3-Al2O3 Aerogel Catalyst
Abstract:
The superfine of ternary NiO-La2O3-Al2O3 aerogel catalysts were prepared by sol-gel method in combination with supercritical drying(SCD) technique. The BET, TEM, XRD, DTA and IR measurement results showed that the aerogel was similiar with the single Al2O3 or binary NiO-Al2O3 aerogel in surface area, apparent density, pore size distribution and structure, but exhibited a better quality. The ternany is easier to crystallize and form NiAl2O4 spinal structure and have a stronger adsorbability.
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Key words:
- NiO-La2O3-Al2O3 aerogel
- / catalyst
- / preparation
- / sol-gel method
- / supercritical drying
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