摘要
以微波技术制备的掺钡纳米氧化镁为载体,以氯化钌为活性前驱体,通过在钌的浸渍液中添加不同种类及浓度的表面活性剂,制得了一系列的Ru/Ba-MgO催化剂,进而运用连续流动的高压装置、N2物理吸附、场发射扫描电子显微镜(FE-SEM)、X射线能量散射仪(XRD)、CO化学吸附对其进行了活性评价及表征。研究结果表明,在实验范围内,在浸渍过程中添加表面活性剂有利于Ru/Ba-MgO催化剂催化性能的提高,其中添加浓度为0.049%的OP-10制得的Ru/Ba-MgO催化剂活性最好,在10MPa,10000h-1和748K的反应条件下,其氨合成反应速率可达50.87mmol·g-1·h-1。
A series of surfactants modified Ru/Ba-MgO catalysts were prepared by the impregnation method, during which ruthenium chloride was used as the Ru precursor and Ba-doped nano-magnesia as the supports, the later was prepared by the chemical co-precipitation method performed with microwave irradiation. The catalysts were characterized by means of N2 physical-adsorption, Field-emission scanning electron microscope, X-ray diffraction and CO chemical adsorption. The activity of the prepared ruthenium-based cataly...
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2008年第3期418-422,共5页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(20203016)
浙江省自然科学基金(Y406294)
关键词
表面活性剂
掺钡纳米氧化镁
钌基催化剂
合成氨
surfactant
Ba-doped nano-magnesia
ruenthium supported catalyst
ammonia synthesis
