People

Erfan Pazoki, MESc student

Erfan Pazoki's Projects

Heavy hydrocarbon adsorption on coke at elevated temperature (Adsorption study for completion of cyclone fouling modeling project)

  • Fouling in cyclones is a major issue in fluid cokers which is leading to extreme reactor pressure drop and consequently leads to unit shut down for maintenance and recovery, and this is a tremendous loss of money
  • Goal of the project is to investigate the potential reasons causing cyclone fouling, establishing a model correlating with the rate of fouling
  • Investigating hydrocarbon adsorption on coke and correlating this to fouling model is the main objective the project

Objectives

Design and construction of a Jiggle Bed Reactor (JBR) for heavy hydrocarbon adsorption Study

Conditions

  • Well agitated condition:
  • negligible external mass transfer
  • uniform temperature (isothermal)
  • Operating at high temperature (50-350°C)
  • Operating at maximum hydrocarbon partial pressure (1 atm)
  • Measurement as a function of time for kinetics study (1-60 s)

 

Features

  • Electromagnet utilization for making a proper gas-solid contact
  • Ceramic crucible with an internal carbon steel cup for reducing amount of heat losses
  • Induction heating system for generating uniform temperature (avoiding hotspots) and fast heating rate
  • Mechanical shaking using a single rod air cylinder with reed switch controller

 

Hydrocarbon adsorption on activated carbon, fluid coke, flexicoke, activated coke

  • n-heptane, n-decane and mesitylene adsorption on various particles
  • Investigation of effect of temperature on adsorption isotherms (hydrocarbon boiling point plus margins)
  • Kinetic of adsorption in the residence time scale of coke in fluid coker horn chamber as the control volume of interest (0-10 seconds)

 

Coke activation and pretreatment

  • Simulated burner conditions for coke (SBC Coke)
  • JBR run at fluid coker’s temperature (650 )  for 1 hour under the nitrogen atmosphere
  • CO2 activation work at 650 , 750  , 850
  • Tracking the effect of pretreatment at each temperature
  • Analyzing the liquid extracted in each run (soxhlet extraction)

 

Liquid-solid adsorption

  • UV spectophotometer usage for the measurement of various particles adsorption capacity
  • Methylene blue and phenol adsorption with fluid coke, flexi coke, activated coke, and activated carbon
  • Equilibrium adsorption capacity measurement
  • Fitting equilibrium results with different isotherms including Langmuir
  • Langmuir model is used to find the particles maximum monolayer adsorption uptake
  • Kinetic study in the time scales of 10 minutes to 4 hours
  • Kinetic model fit to compare the rate of liquid-solid adsorption with various particles
  • Investigation of effect of particles pretreatment on adsorption

Importance

The most significant contributors to Fluid Coker cyclone fouling via changes in process conditions, for the purpose of increasing the reactor run length, will be determined based on the knowledge gathered from this research project. Maximizing Fluid Coker run lengths results in greater yields of saleable distillate products per unit of total energy required in the overall process, therefore improving the unit’s energy efficiency.

Sponsors

Syncrude Canada
NSERC

 

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contact icfar

22312 Wonderland Rd. North RR#3, Ilderton, Ontario, Canada N0M 2A0

 
 
519-661-3885
 
519-661-4016
 
icfar@uwo.ca