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Topic The Building Blocks of Robust Hydroprocessing Unit Operations Presented by : Saurabh Dhir Shell India Markets Private Limited

Topic The Building Blocks of Robust Hydroprocessing Unit ... Building Blocks of Robust Hydroprocessing … · Final Thoughts. Title: PowerPoint Presentation Author: Vikash Kumar Created

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Text of Topic The Building Blocks of Robust Hydroprocessing Unit ... Building Blocks of Robust...

PowerPoint PresentationPresented by :
Saurabh Dhir
• An unplanned turnaround to replace catalyst early has severe financial consequences.
Primary source is anti-foam agents used in delayed cokers
Also found in some crudes and flow improvers used in drilling
Relatively mild poison
on alumina support
means increased Si capacity
penetrate the catalyst pellet
Use of large pore diameter catalysts in VGO service helps to
maximize surface area utilization
Catalyst design for NHTs requires a balance between Si pick-
up and treating activity
Use of a inert, high surface area Si trap resulted in lower
exotherm and shorter cycle
Critical to balance Si pick-up & activity
Usually found in DAO and high end point VGO & HKGO; feeds
contain 2 to 15 ppm Ni & V
Removal involves kinetic reaction followed by deposition on the
catalyst surface
Ni & V traps are designed with an optimum pore size distribution
and balanced activity
• A system designed for 7 ppm Ni & V observed rapid
increase in WABT after 1.5 years due to presence of Silicon
• A rebalanced load with increased demet provided stable
activity through 900 days on stream
Rebalanced load leads to longer cycle
• A FCCPT unit observed an increase in feed metals due to
change in crude source and quality
• Catalyst system was optimized from 2% demet to 15% demet
resulting in a 30% increase in cycle life
30% longer cycle with optimum load
• Found in many types of crude
• Severe poison
• Arsenic trap exhibits better retention of activity while picking
up high concentration of Arsenic
• MaxTrap[As] has 50% greater pick-up
• Higher pick-up capacity of the new MaxTrap[As] increased
the stability of the system resulting in a 30% increase in
cycle length
• Specialized catalyst for high CCR feeds (DAO, deep cut
VGOs) with superior HDCCR and demet activity
• Ni & V removal in an FCCPT unit is higher with MaxTrap[CCR]
• Stable CCR conversion with MaxTrap[CCR]
delta T
run higher margin crudes and heavier feeds
More active and stable main catalysts allow operating
severity to be increased without sacrificing cycle life
Use Catalyst Technology to maximize Profitability
Final Thoughts