【摘 要】
：
Mg/Al mixed oxides with molar ratios of 2_6 of Mg to Al used as supports for platinum catalysts were obtained by the thermal decomposition method. The effect of
【机 构】
：
College of Chemistry
论文部分内容阅读
Mg/Al mixed oxides with molar ratios of 2_6 of Mg to Al used as supports for platinum catalysts were obtained by the thermal decomposition method. The effect of the composition of the mixed oxides on the physicochemical properties was studied by TPD, nitrogen sorption, XRD and TG-DTA characterization methods. The synthesis of o-phenylphenol(OPP) from a dimer(obtained from cyclohexanone condensation) was investigated over Pt/CHT catalysts and compared with those over Pt/MgO and Pt/Al2O3 catalysts. These catalysts show a high activity and selectivity for OPP, with a conversion reaching 93.8% and a selectivity reaching 87.9% in some experiments. For Pt/CHTx catalysts, the calcined hydrotalcites exhibited strong base sites, which were necessary to catalyze the synthesis of OPP.
其他文献
设计了一种变量交叉反馈(VCF)方法控制非线性系统混沌.介绍了VCF方法的控制原理,并用此方法控制Peroxidase-Oxidase(PO)反应系统的混沌,以此验证其有效性.仿真模拟显示,通过
We present a quantum measurement model where the meter is taken to be a squeezed reservoir. We realize decoherence in macroscopic limits using Bogoliubov transf
In this paper, multifractal analysis together with wavelet transform modulus maxima (WTMM) method is used to analyze the fluctuating signals of circulating flui
For some large-scale engineering structures in operating conditions, modal parameters estimation must base itself on response-only data. This problem has receiv
A series of NH4Cs1.5Fe0.08HxPVMo11AsaOy heteropolycompound catalysts for the selective oxidation of isobutane, having Keggin structure, were synthesized by usin
This paper deals with the problem of determining two unknown parameters of some nonlinear reaction-diffusion models. These reaction-diffusion models are derived
The squeeze flow of a rigid-plastic medium between parallel disks is considered for small gaps with partial wall slip. The stress distribution and the squeeze f
Cycle base theory of a graph has been well studied in abstract mathematical field such matroid theory as Whitney and Tutte did and found many applications in pr