Mathematical modeling, Process simulation, Multiphase reactors
Senior Instructor
Advisor, Chemical Engineering (CHML) Program
CHBE 409
University of Novi Sad, 1988, Ph.D. Chemical Engineering
University of Novi Sad, 1981, M.Sc. Chemical Engineering
University of Novi Sad, 1976, B.Sc. Chemical Engineering
Research Interests
  • Mathematical modeling of Chemical Engineering Processes
  • Process simulation
  • Multiphase reactors
  • Chemical Reactor Design
  • Biofuels
  •          Oscar Rosales-Calderon, Heather L. Trajano, Dusko Posarac, and Sheldon J.B. Duff, “Enzyme Recycling by Adsorption during Hydrolysis of Oxygen-Delignified Wheat Straw,” ACS Sustainable Chem. Eng., 2017, 5 (11), pp 9701–9708.
  •          Di Li, Swati Yewalkar, Xiaotao Bi, Sheldon Duff, Dusko Posarac, Heli Wang, Layne A. Woodfin, Jan-Hendrik Hehemann, Sheila C. Potter, Francis E. Nano, “Heterologous expression of LamA gene encoded endo-β-1,3-glucanase and CO2 fixation by bioengineered Synechococcus sp. PCC 7002”, Front. Environ. Sci. Eng. (2017) 11: 9.
  •          Rosales-Calderon Oscar, Trajano Heather L., Posarac Dusko, and Duff Sheldon J.B.,” Modeling of Oxygen Delignified Wheat Straw Enzymatic Hydrolysis as a Function of Hydrolysis Time, Enzyme Concentration, and Lignin Content”, Industrial Biotechnology. June 2016, 12(3): 176-186.
  •          David Kuan, Sheldon Duff, Dusko Posarac and Xiaotao Bi, “Growth optimization of Synechococcus elongatus PCC7942 in lab flasks and a 2-D photobioreactor”, The Canadian Journal of Chemical Engineering, 93, 640-647 (2015).
  •          Jianfei Song, A. Paul Watkinson, Fariborz Taghipour, Dusko Posarac, Bojan Petkovic, “Deposition of Heavy Oil Droplets onto a Circular Disk at Elevated Temperatures”, The Canadian Journal of Chemical Engineering, 92, 1481-1487 (2014).
  •          Soojin Lee, D. Posarac, N. Ellis, “An Experimental Investigation of Biodiesel Synthesis from Waste Canola Oil Using Supercritical Methanol”, Fuel, 91, 229–237 (2012).
  •          Soojin Lee, Dusko Posarac, Naoko Ellis, “Process Simulation and Economic Analysis of Biodiesel Production Processes Using Fresh and Waste Vegetable Oil and Supercritical Methanol”, Chemical Engineering Research and Design, 89, 2626–2642 (2011).
  •          Lakghomi, F. Taghipour, D. Posarac, and A.P. Watkinson “CFD Simulation and Experimental Measurement of Droplet Deposition and Hydrocarbon Fouling at High Temperatures”, Chemical Engineering Journal 172, 507-516 (2011).
  •          Lei Chen, Qingzhe Jiang, Zhaozheng Song, and Dusko Posarac, “Optimization of Methanol Yield from a Reactor of LURGI Type”, Chemical Engineering & Technology, 34, 817–822 (2011).
  •          Swati Yewalkar, Belinda Li, Dusko Posarac, and Sheldon Duff, “Potential for CO2 Fixation by Chlorella pyrenoidosa Grown in Oil Sands Tailings Water”, Energy & Fuels, 25, 1900–1905 (2011).
  •          Allan Jensen, Richard Branion, Sheldon Duff, Dusko Posarac, “The Effects of Dissolved Solids on the Vapor-Liquid Equilibrium of Dimethyl Sulfide in Black Liquor”, TAPPI Journal, 7, 21-27 (2008).
  •          van Lier, Erik J.; Posarac, Dusko; Kwok, K. E.; and Lim, C. Jim (2008) “Modeling, Simulation and Experimental Study of Methanol Synthesis for 11C Radiopharmaceuticals,” Chemical Product and Process Modeling: Vol. 3 : Iss. 1, Article 39.
  •          West, A.H, Posarac, D., Ellis, N., “Assessment of Four Biodiesel Production Processes using HYSYS.Plant”, Bioresource Technology, 99, 6587-6601 (2008).
  •          Jensen, A., G. Pageau, R. Branion, S. Duff and D. Posarac. Predicting kraft mill total reduced sulphur emissions using vapour-liquid equilibrium theory, Pulp and Paper Canada, 108:6, 41-46 (2007).
  •          West, A. H.; Posarac, D., Ellis, N. (2007) “Simulation, Case Studies and Optimization of a Biodiesel Process with a Solid Acid Catalyst,” International Journal of Chemical Reactor Engineering: Vol. 5: A37. Available at:
  •          Hudgins, R.R, Posarac, D., Jaree, A., “Analysis of Steady-State Temperature Profiles from a Laboratory Reactor By Means of a Process Simulator”, Can.J.Chem.Eng. 80, 110-117 (2003)
  •          Posarac, D., Hudgins, R.R., Jaree, A., “Dynamic Analysis of Thermal Behaviour of a Laboratory Reactor Using a Process Simulator”, Can.J.Chem.Eng. 80, 103-109 (2003).
  •          Dogan, M., Posarac, D., Grace, J., Adris, A., Lim, C. J., “Modeling of Autothermal Steam Methane Reforming in a Fluidized Bed Membrane Reactor”, Vol. 1:1., International Journal of Chemical Reactor Engineering, 2003.
  •          Posarac, D., and A.P. Watkinson, “Mixing of a Lignin-Based Slurry Fuel”, Can. J. Chem. Eng., 78(1), 265-270 (2000).         Watkinson, A.P., Sundaram, N., Posarac, D., “Fouling of a Sweet Crude Oil under Inert and Oxygenated Conditions”, Energy & Fuels, 14(1), 64-69 (2000).



CHBE 230 Computational Methods
CHBE 241 Material and Energy Balances
CHML 353 Mechanical and Thermal Operations
CHBE 376 Computer Flowsheeting and Fluid Properties Estimation
CHBE 452 Process Design Project (Environmental/Biological/Process Option)
CHBE 457 Process Synthesis
CHBE 474 Process Control Engineering
CHBE 476 Modeling and Optimization in Chemical Engineering
CHBE 482 Refinery Process Modeling and Simulation
The Association of Professional Engineers and Geoscientists of British Columbia (APEGBC)