Heat-Stable Salts and Methods for Their Removal from Alkanolamine Carbon Dioxide Absorbents (Review)


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Resumo

Absorption using aqueous solutions of alkanolamines is the most widely used procedure for removal of carbon dioxide from natural gas, flue gases from power-generating facilities, and other mixtures. Its main drawback is degradation/deactivation of alkanolamine under the process conditions (high temperatures, presence of oxygen and other impurities) with the formation of heat-stable salts consisting of alkanolammonium cation and anions of organic and inorganic acids. The main operation problems caused by heat-stable salts are considered in the review. Three main methods for removal of heat-stable salts from alkanolamine adsorbents are described in detail: distillation, ion exchange, and electrodialysis. The main characteristics of these methods and their advantages and drawbacks are described, and a comparative analysis is made. The history and state-of-the art of studies within the framework of each method are presented.

Sobre autores

S. Bazhenov

Topchiev Institute of Petrochemical Synthesis

Autor responsável pela correspondência
Email: sbazhenov@ips.ac.ru
Rússia, Moscow, 119991

E. Novitskii

Topchiev Institute of Petrochemical Synthesis

Email: sbazhenov@ips.ac.ru
Rússia, Moscow, 119991

V. Vasilevskii

Topchiev Institute of Petrochemical Synthesis

Email: sbazhenov@ips.ac.ru
Rússia, Moscow, 119991

E. Grushevenko

Topchiev Institute of Petrochemical Synthesis

Email: sbazhenov@ips.ac.ru
Rússia, Moscow, 119991

A. Bienko

PAO VNIPIgasdobycha

Email: sbazhenov@ips.ac.ru
Rússia, Moscow, 119415

A. Volkov

Topchiev Institute of Petrochemical Synthesis

Email: sbazhenov@ips.ac.ru
Rússia, Moscow, 119991

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