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Title: Modified polyamines for CO{sub 2} absorption. Product preparation and characterization

Abstract

Aliphatic polyamines easily absorb acidic gases but unfortunately are not suitable for industrial application because their solutions are difficult to regenerate. Molecular modification is of primary importance to reduce their basicity and to allow their use in acid gas recovery processes. Various modified polyamines were prepared by reacting tetraethylenepentamine (TEPA) with formaldehyde and formaldehyde/phenol in various molar ratios. The physical and chemical characterization of the synthesized products showed a general reduction of basicity; the modification of TEPA with formaldehyde and phenol gave products with high CO{sub 2} absorption capacity and easier regeneration; moreover, the heat of reaction during CO{sub 2} absorption was reduced. The selected compound had a TEPA/CH{sub 2}O/C{sub 6}H{sub 5}OH ratio equal to 1/0.5/0.4. This new product showed higher cyclic capacity, higher absorption rate, and lower degradation compared with diethanolamine under the same experimental conditions. The product is stable, constant in composition, and suitable for industrial scale-up.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Univ. La Sapienza Via Eudossiana, Rome (IT)
OSTI Identifier:
20076078
Alternate Identifier(s):
OSTI ID: 20076078
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research
Additional Journal Information:
Journal Volume: 39; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0888-5885
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; 02 PETROLEUM; ORGANIC POLYMERS; AMINES; SORPTIVE PROPERTIES; CHEMICAL PREPARATION; CARBON DIOXIDE; ADSORPTION; NATURAL GAS; SCRUBBING; REFINERY GASES; REACTION HEAT; REGENERATION

Citation Formats

De Filippis, P., Giavarini, C., Maggi, C., Rinaldi, G., and Silla, R. Modified polyamines for CO{sub 2} absorption. Product preparation and characterization. United States: N. p., 2000. Web. doi:10.1021/ie990546y.
De Filippis, P., Giavarini, C., Maggi, C., Rinaldi, G., & Silla, R. Modified polyamines for CO{sub 2} absorption. Product preparation and characterization. United States. doi:10.1021/ie990546y.
De Filippis, P., Giavarini, C., Maggi, C., Rinaldi, G., and Silla, R. Mon . "Modified polyamines for CO{sub 2} absorption. Product preparation and characterization". United States. doi:10.1021/ie990546y.
@article{osti_20076078,
title = {Modified polyamines for CO{sub 2} absorption. Product preparation and characterization},
author = {De Filippis, P. and Giavarini, C. and Maggi, C. and Rinaldi, G. and Silla, R.},
abstractNote = {Aliphatic polyamines easily absorb acidic gases but unfortunately are not suitable for industrial application because their solutions are difficult to regenerate. Molecular modification is of primary importance to reduce their basicity and to allow their use in acid gas recovery processes. Various modified polyamines were prepared by reacting tetraethylenepentamine (TEPA) with formaldehyde and formaldehyde/phenol in various molar ratios. The physical and chemical characterization of the synthesized products showed a general reduction of basicity; the modification of TEPA with formaldehyde and phenol gave products with high CO{sub 2} absorption capacity and easier regeneration; moreover, the heat of reaction during CO{sub 2} absorption was reduced. The selected compound had a TEPA/CH{sub 2}O/C{sub 6}H{sub 5}OH ratio equal to 1/0.5/0.4. This new product showed higher cyclic capacity, higher absorption rate, and lower degradation compared with diethanolamine under the same experimental conditions. The product is stable, constant in composition, and suitable for industrial scale-up.},
doi = {10.1021/ie990546y},
journal = {Industrial and Engineering Chemistry Research},
issn = {0888-5885},
number = 5,
volume = 39,
place = {United States},
year = {2000},
month = {5}
}