Dendrimer liquid membranes: CO2 separation from gas mixtures

Document Type

Article

Publication Date

5-30-2001

Abstract

A generation 0 poly(amidoamine) (PAMAM) dendrimer in the immobilized liquid membrane (ILM) configuration was studied using flat films and hollow fibers for CO2-N2 separation. This dendrimer as a pure liquid functions as a CO2-selective molecular gate with highly humidified feed gas (Kovvali et al. J. Am. Chem. Soc. 2000, 122, 7594). The present work broadens the range of relative humidity of the feed gas stream (RHf) by adding a small amount of glycerol to the pure dendrimer liquid. A 75% dendrimer-25% glycerol ILM was found to increase the operating range of RHf substantially while maintaining the CO2 permeance and the selectivity (αCO2/N2) close to the levels observed with a pure dendrimer ILM. The performances of pure and 75% dendrimer ILMs were found to be superior or comparable to the highest reported αCO2/N2'S. This behavior is explained in terms of the charged environment in the dendrimer liquid membrane under humidified feed conditions and facilitated transport of CO2.

Identifier

0035972399 (Scopus)

Publication Title

Industrial and Engineering Chemistry Research

External Full Text Location

https://doi.org/10.1021/ie0010520

ISSN

08885885

First Page

2502

Last Page

2511

Issue

11

Volume

40

This document is currently not available here.

Share

COinS