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.
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
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.
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