纳米复合氧化物AM_yAl_(12-y)O_(19-δ)的制备、结构和催化性能

Preparation,structure and catalytic properties of nanometer oxides AM_yAl_(12-y)O_(19-δ)

A series of nanometer oxide catalytic materials AMyAl12-yO19-δwere prepared by roasting solid oxides from the decomposition of nitrates.Its crystal structure and properties were characterized by XRD,BET,TEM techniques,and the catalytic activities for CO2 reforming of methane to synthetic gas was also investigated.Experimental results showed that AMyAl12-yO19-δ exhibited similar crystal structures and different properties due to the difference of the substituted metals A and M.Under the same reaction condition,compound oxides AMyAl12-yO19-δexhibited significant catalytic activities and stability for CO2 reforming of methane.During 18h reaction at 700℃,the conversions of CH4 and CO2 remained over 93.4%and 91.2%,respectively and the amount of carbon deposited was only 1.57%.

A series of nanometer oxide catalytic materials AMy Al12-yO19-δere prepared by roasting solid oxides from the decomposition of nitrates. Its crystal structure and properties were characterized by XBD, BET, TEM teehniques, and the catalytic activities for CO2 reforming of methane to synthetic gas was also investigated. Experimental results showed that AMy Al12-yO19-δxhibited similar crystal structures and different properties due to the difference of the substituted metals A and M. Under the same reaction condition ,compound oxides AMy Al12-yO19-δexhibited significant catalytic activities and stability for CO2 reforming of methane. During 18h reaction at 700℃ ,the conversions of CH4 and CO2 remained over 93.4% and 91.2% ,respectively and the amount of carbon deposited was only 1.57%.