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Title: Adsorption Microcalorimetry of CO 2 in Confined Aminopolymers

Journal Article · · Langmuir

Aminopolymers confined within mesoporous supports have shown promise as materials for direct capture of CO2 from ambient air. In spite of this, relatively little is known about the energetics of CO2 binding in these materials, and the limited calorimetric studies published to date have focused on materials made using molecular aminosilanes rather than amine polymers. In this work, poly(ethylenimine) (PEI) is impregnated within mesoporous SBA-15, and the heats of CO2 adsorption at 30 °C are investigated using a Tian-Calvet calorimeter with emphasis on the role of PEI loading and CO2 pressure in the compositional region relevant to direct capture of CO2 from ambient air. In parallel, CO2 uptakes of these materials are measured using multiple complementary approaches, including both volumetric and gravimetric methods, and distinct changes in uptake as a function of CO2 pressure and amine loading are observed. The CO2 sorption behavior is directly linked to textural data describing the porosity and PEI distribution in the materials.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012577
OSTI ID:
1388725
Journal Information:
Langmuir, Journal Name: Langmuir Journal Issue: 1 Vol. 33; ISSN 0743-7463
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

CO2 Capture with Mesoporous Silicas Modified with Amines by Double Functionalization: Assessment of Adsorption/Desorption Cycles journal May 2018
Oxidatively‐Stable Linear Poly(propylenimine)‐Containing Adsorbents for CO 2 Capture from Ultradilute Streams journal July 2018
Adsorption microcalorimetry as a tool in the characterization of amine-grafted mesoporous silicas for CO2 capture journal March 2019
Silica supported poly(propylene guanidine) as a CO2 sorbent in simulated flue gas and direct air capture journal November 2019
CO2 Capture with Mesoporous Silicas Modified with Amines by Double Functionalization: Assessment of Adsorption/Desorption Cycles journal May 2018