There are two main drivers for partial stroking of valves in safety systems: the desire to extend manual test intervals to as long as possible; and to reduce the amount of redundant hardware required for higher safety integrity levels. Like most things in life, it all boils down to one thing: trying to save money.
As economical separation of contaminants from natural gas becomes increasingly important, simulation eases the design of innovative module to remove carbon dioxide. Membranes offer potential advantages over other methods.
Author: Paul J. Rubas and Kevin R. Geurts, ExxonMobil Upstream Research Co.
The new market realities of higher and rising energy costs as well as global pressures to reduce fossil fuel intensity have made energy management tracking much more valuable. Learn how to keep energy productivity programs from running out of gas in Peter Garforth's latest Energy Expert column.