Thermal cracking pilot plant services (units P2 and P3)
Thermal cracking (or visbreaking) reduces the viscosity of a resid and converts it to valuable products that otherwise cannot be recovered from the residue by conventional distillation. Visbreaking lowers the pour points of waxy residues and enables the refiner to blend heavier materials with lighter fuel oils. Coil temperatures can be raised to increase the yields of lighter products just until coke formation starts to lead to a pressure increase across the visbreaker coil.
Unit P2 is a continuous pilot plant that can be configured to divert the flow to a visbreaker coil instead of the coke drums. It includes a downstream distillation train (flash tower, stabilizer, atmospheric tower and vacuum tower) that can be used to generate a bottoms stream for simulating a recycle operation. The residence time is controlled via coil volume above incipient cracking temperature with eight coils in separate lead pot heaters. The eight coils range in diameter from 1/4 inch to 3/8 inch with a total combined volume of 2.99 liters.
Unit P3 is a continuous pilot plant that can be configured to divert the flow to a visbreaker coil instead of the coke drum. This unit does not have an integrated downstream distillation train. The residence time is controlled via coil volume above incipient cracking temperature with one coil in a fluidized sand bath. The coil has a diameter of 1/4 inch with a total volume of 0.18 liters.
The core design specifications for units P2 and P3 are as follows:
|Unit ID||Feed Rate -Minimum||Feed Rate -Maximum||Visbreaker Coil |
|Unit P2||1.0 L/h (0.26 gal/h)||5.0 L/h (1.32 gal/h)||537.8 °C (1,000 °F)||103.4 bar (1,500 psig)|
|Unit P3||0.4 L/h (0.10 gal/h)||1.0 L/h (0.26 gal/h)||537.8 °C (1,000 °F)||13.9 bar (200 psig)|
Additional attributes to note:
Analytical types and frequency are performed on an as needed basis to ensure that customers are getting only the data they need when they need it. Onsite and external analytical support options are available for characterization and unit control purposes.
In-house analytical support for unit control and external analytical support via the Intertek network of laboratories is as follows:
Common Project Types
This unit has been used for both the generation of process data and also the production of samples (ranging from several liters to multiple drums) which can include:
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