A series of Ba-Al-O/NSR supports were prepared by co-precipitation in this work. The effect of Al/Ba atomic ratio and calcination temperature on the structure and texture of the supports was investigated carefully. The XRD spectra show that Ba is mainly exist in the form of BaAl2O4, and Al exists in Al2O3. The results of SBET indicate that the supports possess relative high specific surface area (70~150 m2/g). The effect of different parameters on the process of supports synthesized was investigated carefully. The results show that the structure and specific surface area of support is significantly depended on calcination temperature.
Abstract:Since the combined effects of the rapid urban growth and climate change, disasters such as blizzard, hurricane, earthquake and traffic jar occur in nearly every city frequently. Building an urban adaptive emergency evaluation index system is a global topic concerned by experts in recent years. It is also a top priority in current urban planning. This paper makes comprehensive research and analysis on the urban adaptive emergency capacity. Firstly, it divides the city's adaptive strength of disaster relief into tensile strength, bending strength, abrasion resistance, fatigue strength and breaking strength etc., which is the basic of building the integrated strength grade to evaluate the city's capacity of keeping out incident. Secondly, it puts forward a set of scientific, complete and quantitative assessment index system (vulnerability, elasticity, stability, rationality and plasticity etc.) for emergency capacity which is based on the during-incident emergency evaluation theory, including Mitigability Measurement, Salvability Measurement, and Recoverability Measurement. Lastly, the paper studies the comprehensive evaluation index system of urban emergency capacity based on the external DEA, which can indicate the urban adaptive capacity of disaster relief in magic cube. Above all, the results can provide the reference for urban disaster risk management.
A series of Ba-Al-O NSR supports and Pt/Ba-Al-O NSR catalysts are prepared by co-precipitation and impregnation method in this work. The catalyst and the support are characterized by XRD, SEM, SBET performance testing. The structure and texture of the supports is observed and discussed. The results of SBET indicate that the supports possess relative high specific surface area (94~110 m2/g). Temperature programmed reduction is characterized by means of H2-TPR.
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