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Comparison of the Effects of Dispersed Noble Metal (Pd) Biomass Supported Catalysts with Typical Hydrogenation (Pd/C, Pd/Al2O3) and Hydrotreatment Catalysts (CoMo/Al2O3) for In-Situ Heavy Oil Upgrading with Toe-to-Heel Air Injection (THAI)

Wood, Joseph (2016) Comparison of the Effects of Dispersed Noble Metal (Pd) Biomass Supported Catalysts with Typical Hydrogenation (Pd/C, Pd/Al2O3) and Hydrotreatment Catalysts (CoMo/Al2O3) for In-Situ Heavy Oil Upgrading with Toe-to-Heel Air Injection (THAI). [Dataset]

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URL of Published Version: http://www.sciencedirect.com/science/article/pii/S0016236116302290

Abstract

Catalyst deactivation due to coke and metals deposition as a result of cracking presents a challenge in heavy oil recovery and upgrading. This is particularly pronounced for in situ upgrading techniques, in which pelleted catalyst is packed around the perimeter of the horizontal producer well of the Toe-to-Heel Air Injection (THAI) process. The fixed bed of catalyst is virtually impossible to regenerate in place, promoting investigation of alternative contacting via the dispersion of nanoparticles. The catalysts studied were finely crushed micro-particulates with average size of 2.6 µm and also a catalyst prepared upon a bacterial support. The latter has advantages in terms of ease of preparation of catalysts from recycled metal sources. Heavy oil of API gravity 13.8o and viscosity 1091mPa.s was used as feed and upgrading was performed in a batch reactor at 425 oC, with a catalyst-to-oil ratio of 0.02 (g/g), and at an initial pressure of 20 bar. The activity of the Pd/biomass catalyst was evaluated against a number of other catalysts: Pd/Al2O3, Pd/C, Al2O3 and Co-Mo/Al2O3. By using the Pd/biomass catalyst, the produced oil gravity increased by 7.8o API, and its viscosity was reduced to 7 mPa.s. This effect corresponded to an increase in the amount of low-boiling distillate (IBP-200oC) from 34.6 vol.% (original feedstock) to 53-62 vol.%, potentially reducing the amount of diluent needed for pipeline transport of bitumen. The coke yields were (wt%): 13.65 (Al2O3), 9.55 (Pd/Al2O3), 6.85 (Pd/C) and 3.87 (Pd/biomass). The Pd/biomass catalyst showed significantly reduced coke yield compared to thermal cracking and upgrading using Pd/C and Pd/Al2O3 catalysts, which could greatly enhance catalyst survivability in the field.

Type of Work:Dataset
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:Chemical Engineering
Additional Information:

Data connected to publication: Hart, Abarasi, et al. "Comparison of the effects of dispersed noble metal (Pd) biomass supported catalysts with typical hydrogenation (Pd/C, Pd/Al 2 O 3) and hydrotreatment catalysts (CoMo/Al 2 O 3) for in-situ heavy oil upgrading with Toe-to-Heel Air Injection (THAI)." Fuel 180 (2016): 367-376. http://dx.doi.org/10.1016/j.fuel.2016.04.064

Date:12 April 2016
Projects: EP/J008303/1
Subjects:T Technology > TP Chemical technology
Editors:Hart, Abarasi and Omajali, Jacob B. and Murray, Angela and Macaskie, LE and Greaves, Malcolm and Wood, Joseph
Funders:EPSRC
ID Code:2160

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