Systems and process for calibrating a sensor used in a sulfur extraction process

A method for calibrating a sensor used in a process for extracting sulfur compounds from a hydrocarbon stream, the method comprising:

• obtaining a sensor data regarding a stream from a sulfur extraction process;
• determining a sulfur concentration data from the sensor data;
• comparing the sulfur concentration data to a first calibration data to determine a difference between the between the sulfur concentration data and the first calibration data;
• and,
• when a difference between the sulfur concentration data and the first calibration data is above a threshold, comparing the sulfur concentration data to a second calibration data different from the first calibration data to calibrate the sensor.

A process for removing sulfur compounds from a hydrocarbon stream, the process comprising:

• extracting sulfur compounds with a caustic stream from a hydrocarbon feed stream to provide a treated hydrocarbon stream and a rich caustic stream;
• obtaining, with an ORP sensor, an ORP data regarding the rich caustic stream;
• oxidizing the sulfur compounds in the rich caustic stream in a presence of a catalyst to provide a lean caustic stream;
• determining a sulfur concentration data from the ORP data;
• comparing the sulfur concentration data to a first calibration data to determine a difference between the between the sulfur concentration data and the first calibration data;
• and,
• when a difference between the sulfur concentration data and the first calibration data is below a threshold, recommending at least one change to an operating condition associated with the process for removing sulfur compounds from the hydrocarbon stream.