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Primary, Secondary, and Tertiary Amines for CO2 Capture: Designing for Mesoporous CO2 Adsorbents

Primary, Secondary, and Tertiary Amines for CO2 Capture: Designing for Mesoporous CO2 Adsorbents

Young Gun Ko, Seung Su Shin, Ung Su Choi

J Colloid Interface Sci. 2011 Sep 15;361(2):594-602.

PMID: 21708387

Abstract:

CO(2) emissions, from fossil-fuel-burning power plants, the breathing, etc., influence the global worming on large scale and the man's work efficiency on small scale. The reversible capture of CO(2) is a prominent feature of CO(2) organic-inorganic hybrid adsorbent to sequester CO(2). Herein, (3-aminopropyl) trimethoxysilane (APTMS), [3-(methylamino)propyl] trimethoxysilane (MAPTMS), and [3-(diethylamino) propyl] trimethoxysilane (DEAPTMS) are immobilized on highly ordered mesoporous silicas (SBA-15) to catch CO(2) as primary, secondary, and tertiary aminosilica adsorbents. X-ray photoelectron spectroscopy was used to analyze the immobilized APTMS, MAPTMS, and DEAPTMS on the SBA-15. We report an interesting discovery that the CO(2) adsorption and desorption on the adsorbent depend on the amine type of the aminosilica adsorbent. The adsorbed CO(2) was easily desorbed from the adsorbent with the low energy consumption in the order of tertiary, secondary, and primary amino-adsorbents while the adsorption amount and the bonding-affinity increased in the reverse order. The effectiveness of amino-functionalized (1(o), 2(o), and 3(o) amines) SBA-15s as a CO(2) capturing agent was investigated in terms of adsorption capacity, adsorption-desorption kinetics, and thermodynamics. This work demonstrates apt amine types to catch CO(2) and regenerate the adsorbent, which may open new avenues to designing "CO(2) basket".

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP41051803	[3-(Diethylamino)propyl]trimethoxysilane		41051-80-3	Price

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