نتایج جستجو برای: heteropoly acid
تعداد نتایج: 747560 فیلتر نتایج به سال:
The present study investigates modified Mo/V/W mixed oxides as a possible alternative for state of the art heteropoly acid catalysts (HPA) in partial oxidation methacrolein (MAC) to methacrylic (MAA). Even though HPAs show an excellent activity and MAA selectivity, their long-term stability is unsatisfying, rendering catalyst inoperable after runtimes roughly 6 months. consisting M1 hexagonal (...
Aurcularia auricular polysaccharide (AAP) is a kind of acidic heteropoly sugar containing β-D-glucan, it has good biological activities. In this paper, the main components, extraction methods and development application AAP were systematically introduced, in order to provide new ideas theoretical basis for promoting creation products AAP.
Abstract: The aim of this research is to provide a convenient and relatively inexpensive preparation method for synthesis of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). TATB is a reasonably powerful explosive in which ts thermal and shock stability is considerably greater than that of any other known energetic material. It is used in military applications because of its significant insensitiv...
The performance of MSU-S and its forms modified with phosphotungstic acid (HPW) and nickel (Ni) for the desulfurization and denitrogenation of model diesel fuel were studied. According to the results of the characteristic tests (N2 adsorption-desorption, XRD, SEM, and NH3-TPD), heteropoly acid incorporation causes higher acidity along with a negligible loss of structural a...
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