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A New Chemical System Solution for Acid Gas Removal
Author(s) -
Rolker Jörn,
Lenormant Thibaut,
Seiler Matthias
Publication year - 2012
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201100240
Subject(s) - reboiler , sour gas , acid gas , chemistry , natural gas , flue gas , corrosion , amine gas treating , operating expense , heat exchanger , absorption (acoustics) , waste management , process engineering , chemical engineering , materials science , inorganic chemistry , organic chemistry , engineering , mechanical engineering , finance , distillation , economics , composite material
An energy‐efficient absorbent formulation for separating acid gases (e.g. CO 2 , H 2 S) from gas streams such as natural gas, syngas or flue gas is important for a number of industrial applications. In many cases, a substantial share of their costs is driven by the operational expenditure (OPEX) of the CO 2 separation unit. One possible strategy for reducing OPEX is the improvement of the absorbent performance. Although a number of absorbents for the separation of CO 2 from gas streams exist, there is still a need to develop CO 2 absorbents with an improved absorption performance, less corrosion and foaming, no nitrosamine formation, lower energy requirement and therefore less OPEX. Selected performance results of a new family of amine‐based CO 2 absorbents are summarized. High cyclic capacities in the range of 2.9 to 3.2 mol CO 2 kg –1 absorbent and low absorption enthalpies of about –30 kJ mol –1 allow for significant savings in the regeneration energy of the absorbent. Calculations with the modified Kremser model indicated a reduction in the specific reboiler heat duty of 45 %. Furthermore, the absorbents developed show much lower corrosion rates than state‐of‐the‐art solutions that are currently employed.