Aiming at deep desulfurization of gasoline,three amphiphilic catalysts [C18H37N(CH3)3]3+x [PMo12-xVxO40](x=1,2,or 3) were prepared and characterized.The amphiph
The United States carried out the first hydraulic fracturing in 1947 after 60 years of development, and has made amazing development
The United States carried