ABSTRACT
This chapter discusses organic and nonorganic minor components either present in the raw natural gas or introduced into the gas stream and how they can be managed. The chapter briefly discusses methods for mitigating the presence of hydrogen and oxygen. Processes are given for removal of arsenic and mercury, which are both health and safety hazards. The chapter discusses naturally occurring radioactive material (NORM), which accumulates from decay of trace concentrations of radon. Some natural gases contain small quantities of valuable helium. Methods used to recover helium are discussed. Benzene, toluene, ethylbenzene, and xylene (BTEX) concentrates in glycol and amine treating of gases cause environmental problems. The chapter discusses ways to minimize BTEX emissions. Methanol introduced in the field or in plant operations to prevent gas hydrate formation may adversely affect the quality of liquids. The chapter covers processes to remove methanol.
