Sonochemical and impregnated Co-W/ɣ-Al₂O₃ catalysts : performances and kinetic studies on hydrotreatment of light gas oil
| dc.contributor.advisor | Dalai, Ajay K. | en_US |
| dc.creator | Vishwakarma, Santosh Kumar | en_US |
| dc.date.accessioned | 2007-01-29T11:58:06Z | en_US |
| dc.date.accessioned | 2013-01-04T04:25:00Z | |
| dc.date.available | 2007-01-30T08:00:00Z | en_US |
| dc.date.available | 2013-01-04T04:25:00Z | |
| dc.date.created | 2007-01 | en_US |
| dc.date.issued | 2007-01-30 | en_US |
| dc.date.submitted | January 2007 | en_US |
| dc.description.abstract | ɣ-A₂O₃ supported Co-W based catalysts with varying Co (1 - 3 wt %) and W (7 - 13 wt %) loadings were prepared using impregnation and sonochemical methods. All prepared catalysts were characterized with elemental analysis, BET analysis, X-ray diffraction (XRD), NH₃ temperature programmed desorption (TPD), temperature programmed reduction (TPR) and thermogravimetry analysis (TGA). The performances of all the synthesized catalysts were tested at a pressure of 8.9 MPa, LHSV of 2 h⁻¹ and temperatures of 340, 350 and 360°C in a laboratory trickle bed microreactor for hydrodesulphurization (HDS) and hydrodenitrogenation (HDN) of light gas oil (LGO) derived from Athabasca bitumen. The performance tests with impregnated catalysts indicated a maximum in activity for HDS and HDN reactions (sulfur and nitrogen conversions at 93.0 and 57.1 % at 360°C) for Co(3 wt %)-W(10 wt %)/ɣ-Al₂O₃ whereas the performance tests with sonochemically prepared catalysts showed a maximum in activity (sulfur and nitrogen conversions at 87.9 and 42.5 % at 360 °C) for Co(3 wt %)-W(11.5 wt %)/ɣ-Al₂O₃. These two catalysts were selected for detail performance, optimization and kinetic studies. The effects of reaction temperature (340 - 380 °C), pressure (7.6 - 10.3 MPa), liquid hourly space velocity (1.5 - 2.0 h⁻¹) and hydrogen gas/gas oil ratio (400 - 800 mL/mL) were examined on HDS and HDN of LGO with these catalysts. The reaction kinetics for HDS was best fitted with a Power Law model whereas same for HDN was found to be best represented by a Langmuir-Hinshelwood model with a reasonable accuracy | en_US |
| dc.identifier.uri | http://hdl.handle.net/10388/etd-01292007-115806 | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Co-W/ɣ-Al₂O₃ | en_US |
| dc.subject | Light Gas Oil | en_US |
| dc.subject | Hydrotreatment | en_US |
| dc.subject | Sonochemical | en_US |
| dc.title | Sonochemical and impregnated Co-W/ɣ-Al₂O₃ catalysts : performances and kinetic studies on hydrotreatment of light gas oil | en_US |
| dc.type.genre | Thesis | en_US |
| dc.type.material | text | en_US |
| thesis.degree.department | Chemical Engineering | en_US |
| thesis.degree.discipline | Chemical Engineering | en_US |
| thesis.degree.grantor | University of Saskatchewan | en_US |
| thesis.degree.level | Masters | en_US |
| thesis.degree.name | Master of Science (M.Sc.) | en_US |