Services Provided | Electrosep

By: Electrosep  09-12-2011
Keywords: Acids, Anions

Heat Stable Amine Salts
Heat Stable Amine Salts (HSAS) are formed when strong acids in gas streams being treated are absorbed by the amine solutions. The anions of the acids react with the amine to form the HSAS. Typical strong anions are formate, acetate, ocalate, glycolate, chloride, sulphate, thiosulphate, and thiocyante etc.

HSAS problems are particularly serious in the petroleum refining and coal gasification industries. Substantial levels of HSAS's, especially formate and thiocyanate, are often seen in the solutions used to treat the gas and liquid streams originating from the various catalytic and thermal processes prevalent in these industries.

However, in the natural gas industry the acetic and hydrochloric acids used in various well treatment activities, such as acid fracturing, can also lead to the formation of HSAS's if they are introduced into the amine unit. Similarly, entrainment of formation water can add chloride and sulfate, although in this case they will most probably enter as an inorganic salt and will not result in amine neutralization. Another significant source of acids and salts can be make-up water that has been treated by a water softener or conditioner, particularly if not well maintained. Although anions entering, as a salt rather than the acid do not lead to the formation of HSAS's and the deactivation of the amine, they can lead to many of the same problems associated with HSAS's, namely increased potential for corrosion fouling, and generally poor performance.

Excessive levels of HSAS can lead to operating problems such as:

  • Corrosion
  • Foaming
  • Loss of scrubbing capacity
  • Excessive filtration requirements
  • Excessive amine losses
  • Amine system control and operability issues

ElectroSep is the operator of the UCARSEP™ mobile unit.

HSAS problems are particularly serious in the petroleum refining and coal gasification industries. Substantial levels of HSAS's, especially formate and thiocyanate, are often seen in the solutions used to treat the gas and liquid streams originating from the various catalytic and thermal processes prevalent in these industries. However, in the natural gas industry the acetic and hydrochloric acids used in various well treatment activities, such as acid fracturing, can also lead to the formation of HSAS's if they are introduced into the amine unit. Similarly, entrainment of formation water can add chloride and sulfate, although in this case they will most probably enter as an inorganic salt and will not result in amine neutralization. Another significant source of acids and salts can be make-up water that has been treated by a water softener or conditioner, particularly if not well maintained. Although anions entering, as a salt rather than the acid do not lead to the formation of HSAS's and the deactivation of the amine, they can lead to many of the same problems associated with HSAS's, namely increased potential for corrosion fouling, and generally poor performance.

Glycol Reclamation
Glycol systems used in oil refineries and gas / oil processing facilities often accumulate salts (organic and inorganic). The ElectroSep process is noted for being both cost effective and for its’ ease of use. No chemical re-agents are required in this salt removal process.

Mobile services are available throughout North America. Fixed units are also available.

Carbon Capture (CO2)
Amine based carbon capture “storage” systems generate substantial quantities of heat stable amine salts. ElectroSep patent process is the leading method for efficient removal of salts while minimizing waste volumes and amine losses. This process offers seamless integration with amine capture process.

Amine Based Regenerable Sulphur Dioxide (SO2) Scrubbing
Amine based SO2 regenerable scrubbing processes generate substantial quantities of heat stable amine salts. ElectroSep patent process is the leading process for efficient removal of salts while minimizing both waste volumes and amine losses. This process offers seamless integration with amine capture process.

Hydrocarbon
Work with third parties to provide this service as required.

Testing
ElectroSep operates a pilot unit that can be used to perform tests on client’s amines before engaging the services of the UCARSEP™ mobile unit or designing and installing a fixed unit. The testing results are then used to propose customized HSAS control solutions.

The testing facilities can also be used for process development of separations taking advantage of electrodialysis’ unique characteristics.

Keywords: Acids, Anions