摘要
采用溶胶凝胶法和脉冲电磁场辅助溶胶凝胶法制备了Ce改性γ-Al2O3载体,利用BET,SEM,FTIR,XRD等方法对所制备的样品进行了表征。考察了脉冲电磁场电压强度对Ce改性γ-Al2O3载体样品的物理性能以及高温热稳定性的影响。结果表明,脉冲电压为300 V时,Ce改性γ-Al2O3载体具有较高的比表面积、较大的孔体积和平均孔径,Ce在载体表面的分散较好,颗粒较细,而且载体表面的羟基覆盖量大,具有较强的高温热稳定性。
Ce modified γ-Al2 O3 support samples were prepared by sol-gel method with and without the presence of a pulse electromagnetic field （PEMF）,respectively. The physical properties and thermal stabilities of the samples at different pulse voltage were characterized by N2 physisorption,scanning e-lectron microscope,IR spectroscopy and X-ray diffraction techniques. Results show that the specific pore volume and specific surface area of Ce modified γ-Al2 O3 sample at 300 V increase by 19. 50% and 18. 45%,respectively,compared with sample without PEMF treatment. Moreover,the amount of hy-droxyl group covered on the surface of γ-Al2 O3 increases resulting from evenly dispersed CeO2 and the high temperature thermal stability of samples with PEMF treatment is improved accordingly.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2014年第3期18-21,共4页
Petroleum Processing and Petrochemicals
基金
辽宁工业大学教师科研基金项目(X201114)
辽宁省自然科学基金项目(201204916)
关键词
脉冲电磁场
铈
改性
Γ-氧化铝
热稳定性
pulse electromagnetic field
cerium
modification
γ-alumina
thermal stability
