A newly developed catalyst type DVR- 1 for catalytic cracking of Daqing vacuum resid was put into use in a commercial VRFCC unit. This catalyst features uniquely active matrix and modified ultrastable zeolite. The com...
The crude oils processed at refineries worldwide are becom ing heavier with the contents of sulfur and heavy metals increasing since the 1990s. The environmental regulations promulgated by the governments of many coun...