Meifeng Han

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A series of finely dispersed poly(vinyl-2-pyrrolidone)-stabilized platinum colloidal nanocatalysts (PVP-Pt) were prepared and characterized by TEM. Hydrogenation of monochlorobenzene (MCB) was carried out in a batch mode using hydrogen over PVP-Pt at 298 K and atmospheric pressure. The product consisted of benzene and cyclohexane during the reaction, and(More)
Injecting a gas into fusion reactors or semiconductor manufacturing systems, one has to quickly control the flow rate by a piezoelectric valve. In order to construct a gas injection system with high speed valves in the future, performance tests have been conducted on a commercial piezoelectric valve. An orifice flowmeter for measuring time average flowrate(More)
The transient phenomena of incident shock waves during its passage through an orifice, a diverging nozzle, and a conical disk as baffles in a tube are numerically simulated. The influence of geometrical configurations of the baffles on shock attenuation is investigated. The results show that the conical disk was most effective configuration to weaken the(More)
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