Liyan LIU;Yu ZHANG;Wei TAN ; Synthesis and characterization of phosphotungstic acid/activated carbon as a novel ultrasound oxidative desulfurization catalyst Liyan LIU;Yu ZHANG;Wei TAN ; School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China ; Fig.8 Effect of ultrasound on the catalytic activity of PTAAC Conditions: 40 mL model oil, mass ratio of PTAAC-10 catalystmodel oil= 1.25 : 100, volume ratio of H 2 O 2 mode oil= 1 : 10, 60°C Frontiers of Chemical Science and Engineering,2013,7(4),422-427. Doi:10.1007/s11705-013-1353-2