Page 302 - Petroleum and Gas Field Processing

it in a single module to about 20% and to use amine absorption unit to
reduce it to natural gas acid concentration, as shown in Figure 21.

11.6.5 Environmental Aspects
Hydrogen sulfide is one of the major pollutants in petroleum field
processing, and acid gas treatment is one of the most important steps to
eliminate H 2 S. However, in the course of this treatment, some side
products can cause pollution problems and must be eliminated.
In amine treatment, the following pollutants are produced and the
corresponding countermeasures are given in Table 7.

Figure 21 Bulk acid gas removal by the membrane process.

Table 7 Pollution Prevention Alternatives
Waste Pollution prevention alternatives
Amines Use an amine reclaimer in the system to allow reuse
of amine and minimize the volume of waste generated.
Use an amine filter to extend the life of solution and
maintain efficiency.
Filters Change filters only when necessary; use differential
pressure as indicator of needed change.
Use reusable filters.
When handling filters, care should be taken to prevent
oil spillage.
Isolate all drained fluids in tight container for recycling.
Iron sponge and Consider alternative methods of removing H 2 S from
Iron sulfide scale gas stream.
Treat production streams with biocide or scale inhibitor
to reduce iron sulfide formation.

Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.