ABSTRACT
Dehydration is important in both field and plant operations. The chapter begins with a discussion of water content in natural gas and then details common removal processes. It discusses glycol dehydration that can dry gas to pipeline specifications. The properties of various glycols are given, and the triethylene glycol (TEG) process is discussed. The chapter discusses acid gas dehydration using glycol. It then covers other factors that affect glycol dehydrator performance. The chapter then discusses the adsorption process with emphasis on molecular sieve when gas needs to be dried down to below a part per million. It gives example calculations involving bed sizing and heat requirements for regenerating the bed. It also discusses other factors that can affect the adsorption process. The chapter concludes with brief discussion of nonregenerable desiccants, membranes, and less common techniques.
