Raney-Copper(R-Cu)catalyst was prepared and its sintering behaviour in atmospheres at teperature 300℃-600℃ was detected by methods of SSA,PSD,XRD and SEM.It was found that sintering of R-Cu started from much lower t...Raney-Copper(R-Cu)catalyst was prepared and its sintering behaviour in atmospheres at teperature 300℃-600℃ was detected by methods of SSA,PSD,XRD and SEM.It was found that sintering of R-Cu started from much lower temperature than the melting point of copper.Changes both on the surface and in the body phase were discovered.There is a rule in the extent of sintering for R-Cu in different atmospheres which is related to the adsorption of the particular gases molecules on the surface of the catalyst.Dynamical equations of the surface decrease is established and the mechanism of sintering is discussed.Calculations of quantum mechanics give the similar results.展开更多
文摘Raney-Copper(R-Cu)catalyst was prepared and its sintering behaviour in atmospheres at teperature 300℃-600℃ was detected by methods of SSA,PSD,XRD and SEM.It was found that sintering of R-Cu started from much lower temperature than the melting point of copper.Changes both on the surface and in the body phase were discovered.There is a rule in the extent of sintering for R-Cu in different atmospheres which is related to the adsorption of the particular gases molecules on the surface of the catalyst.Dynamical equations of the surface decrease is established and the mechanism of sintering is discussed.Calculations of quantum mechanics give the similar results.
