Abstract
A series of alumina-aluminum borates (AAB) with various boria contents were prepared by a coprecipitation technique. They were characterized with respect to surface area, pore volume, and pore size distribution. The temperature-programmed-reduction (TPR) method was used to monitor molybdenum oxide-support interaction. The results showed that both the T[sub max] and hydrogen consumption of low-temperature-reduction peak increase with increasing B[sub 2]O[sub 3] content. Hydrode-sulfurization of heavy residue oils over NiMo/AAB catalysts was carried out in a trickle bed reactor at 663 K and 7.6 MPa. The results revealed that these catalysts are much more active than the conventional NiMo/Al[sub 2]O[sub 3] catalysts. The dispersion of active sulfide phase as well as the hydrogenation ability of NiMo/Al[sub 2]O[sub 3] catalyst is increased by the incorporation of adequate boria content. An optimum B[sub 2]O[sub 3] content which gives the highest activity was found in the vicinity of 4 wt%.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
