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Need to know what is the Synthetic equivalent of BP Turbine oil Energol THB 46. This oil is being used in a synthesis gas compressor of an Ammonia plant. Siemens Steam Turbine is driving the Cooper centrifugal compressor. THB 46 is common lube oil to both, it also serves as the seal oil for the compressor. It contains some amount of sulfur, which is killing the synthesis in the downstream of the process. We need a sulfur free mineral oil or synthetic oil. It will be good if equivalent is either from Shell or BP.
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Arshad,

Many Turbine oils have antiwear packages and ZDDP is almost never used for Turbine oil packages. This leaves a sulphur-phosporous type of additive package for use in Turbine oils.

In all probability the Sulphur content may not be more than 250 to 400 ppm in such packages.

Thus the turbine oil may not affect the process. However you must also note that all base oils undergo a de-sulphurisation or sulphur stripping process in the refinery. If base stocks have higher Sulphur content then this may get compounded with the SP additive package. Thus you may not be in a position to obtain "sulphur free" products readily.

In the circumstances Synthetic is a good choice. Most of the Aviation Turbine Lubes are synthetic oils. I will search my database and in my next post I will give some brands and names.

Hussam Adeni
Arshad,
My apologies for replying to this so late but have not had access to this site for a while. Direct comparables to BP turbine oil Energol THB 46 are: Castrol Perfecto T46
Exxon Teresso 46
Mobil DTE Medium
Shell Turbo T46

Hope this is of use to you, there shall be other grades from other companies but i can not guarantee that they will be directly comparable to the above. A good synthetic equivalent would be Castrol 778.
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