In situ monitoring of coke morphology in a delayed coker using ac impedance
AssigneeExxonMobil Research and Engineering Company
InventorLimin Song
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Abstract
Methods and systems for in situ monitoring of coke morphology in a delayed coking unit. At least one transmitting electrode and at least one receiving electrode are utilized to transmit AC current across coke being formed within the delayed coking unit. An impedance analyzer can be used to measure the impedance encountered between the transmitting electrode and the receiving electrode. This measure impedance is compared to an impedance curve comprising known impedance values for different coke morphologies to determine the morphology of coke being formed in the delayed coking unit.
Claims24
A method for monitoring coke morphology in situ in a delayed coking unit containing coke, comprising:
- providing a transmitting electrode;
- providing a receiving electrode;
- transmitting an AC current at a frequency from the transmitting electrode to the receiving electrode;
- wherein the AC current traverses the coke within the delayed coking unit;
- measuring an impedance between the transmitting electrode and the receiving electrode across the coke at the frequency;
- and
- comparing the measured impedance to an impedance curve to determine the coke morphology within the delayed coking unit.
A system for monitoring coke morphology in situ in a delayed coking unit containing coke, comprising:
- a transmitting electrode;
- a receiving electrode;
- a source of AC current at a frequency from the transmitting electrode to the receiving electrode;
- wherein the AC current traverses the coke within the delayed coking unit and
- an impedance analyzer to measure the impedance between the transmitting electrode and the receiving electrode across the coke at the frequency.
Dependencies are inferred from the claim text.