- Collection:
- Atlanta University and Clark Atlanta University Theses and Dissertations
- Title:
- Catalyst design for the upgrading of heavy oil under mild hydrocracking conditions, 1998
- Creator:
- Ghebreyessus, Kesete Y.
- Date of Original:
- 1998-07-01
- Subject:
- Degrees, Academic
Dissertations, Academic - Location:
- United States, Georgia, Fulton County, Atlanta, 33.749, -84.38798
- Medium:
- theses
- Type:
- Text
- Format:
- application/pdf
- Description:
- Crystalline large pore, metal substituted aluminophosphate molecular sieve catalysts of the MeAPO 36 topology, containing divalent forms of Co, Mg and Zn with similar molar compositions, were synthesized under hydrothermal conditions and characterized. Investigations on crystallinity, thermal stability, acidic properties and surface area of the MeAPO 36s were carried out. The catalysts were shown to preserve their crystallinity after they were incorporated into y alumina pellets. The catalytic activities of the NiMo/MeAPO 36 supported on y alumina were evaluated for the hydrocracking of gas oil under mild hydrocracking conditions by using high temperature/high pressure (HT/HP) reactor at 400 C and 5.5 MPa hydrogen partial pressure. The performances of the catalysts were compared by determining their activity for the conversion of the gas oil towards naphtha and middle distillates. The catalysts showed potential activity, with CoAPO 36 exhibiting higher activity than MgAPO 36 and ZnAPO 36. The net percentage conversions obtained under the given conditions were 71.3, 60.8, and 58.6 wt % for CoAPO 36, MgAPO 36 and ZnAPO 36, respectively.
- External Identifiers:
- Metadata URL:
- http://hdl.handle.net/20.500.12322/cau.td:1998_ghebreyessus_kesete_y
- Rights Holder:
- Clark Atlanta University
- Holding Institution:
- Atlanta University Center Robert W. Woodruff Library
- Rights:
-
