I am going to design a dehydration unit (molecular sieve) in upstream on demethanizer.
During FEED of the project, -110°C as water dew point has been specified by designer.
Minimum temperature in downstream of dehydration unit is -109°C.
Actually, is it required to meet such low water dew temperature?
By knowing that ice will be formed in 0°C, what is the meaning of -110°C as dew point of water?
Vendors such as AMTEK provide instrument for water content measurement up to 0.1 ppm (Attachment). How can I calculate water fraction corresponding to -110°C to check it with instrument vendors? And is it actually possible to meet such low dew point (-110°C) with conventional process (Molecular Sieve dehydration)
Ghasem.Bashiri@gmail.com