机构地区: 广东工业大学轻工化工学院
出 处: 《稀有金属》 2010年第1期58-62,共5页
摘 要: 采用反相微乳法制备和超临界干燥获得前驱体BaO.MnO.6Al2O3。利用TG-DTA曲线和XRD分析对前驱体的热分解过程进行研究,并用Coats-Redfern法和Kissinger法进一步研究前驱体的热分解动力学,获得六铝酸盐催化剂前驱体热分解的机制函数为:积分式G(α)=[-ln(1-α)]4,微分式为:f(α)=(1/4)(1-α)[-ln(1-α)]-3,反应为随机成核和随后生长控制,计算出的活化能Ea=187.80kJ.mol-1。 The precursor BaO·MnO·6Al2O3 of catalyst BaMnAl11O19-δ was prepared by reverse microemulsion method and dried by supercritical drying. The thermal decomposition process of the precursor was studied with TG-DTA and XRD. And the thermal decomposition kinetics of the precursor was studied with Coats-Redfem method and Kissinger method. According to the calculation results of Kissinger method and Coats-Redfem method,the thermal decomposition mechanism function of the precursor could be described as integral form...