Hydrosulfurization (HDS)
Special solutions for special challenges - highly corrosive media we face with experience and a large portfolio for a measuring loops completely from one source.
Keyfacts Processs/Application
Sector
[Proc]
Application
[Proc] What is produced: Raw material, reaction, product, waste materials, hazardous materials
[App] [location of measuring point] in [installation situation(pipe/tank/reactor) in [process step]. What are the measured values used for; how often is measured
Measured Parameter
pH, ORP, DO, Cond
Key Requirements
[App] Medium; Measuring range; Media properties:
- Temperature range
- Pressure range
- Ex/Non-Ex
- What were the special or biggest requirements: Operating environment, legal requirements, medium, pressure, temperature
pH Measurement in the Reprocessing of Mineral Oil Products
Naturally occurring mineral oil products contain sulfur compounds as well as other contaminants, which have to be removed in a first processing step. One common process is hydrodesulfurization. In this process, the sulfur components are converted to hydrogen sulfide using hydrogen and a nickel/molybdenum or cobalt/molybdenum catalyst, which is separated in the next step. In the meantime, the gas is dissolved in an aqueous phase, whereby the pH value must be regulated.
Challenges
- Aqueous phase with hydrogen sulfide offers high corrosion potential pH value must be between 6-8
- Temperature: 40-50 °C
- Pressure: 4 bar
- Hydrogen sulfide affects the reference of the pH sensor
Why Knick ?
By switching to the externally pressurized SE557-X/1-electrode, the previous sensor replacement rate of 1 per month was reduced to 3 in 1.5 years. This resulted in a cost saving of almost 90 % for the material alone and additionally by saving the working time for the monthly sensor change.
H2 [Proc] [App] Application Description
[Proc]
[App] Detailed application description, why is measured, which customer problem is solved
H3 [App] Initial Situation
Was there a solution before, which was perhaps not good enough? Have requirements changed
H3 [App] Requirements of Application
What were the special or biggest requirements: Operating environment, legal requirements, medium, pressure, temperature, installation situation
H3 [App] Solution
Products used and why the solution was implemented in this form (transmitter, fitting, sensor, cCare)
Was a previous test necessary?
H2 [App] Video
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