Issue 17, 2018

Germanium-incorporated lithium silicate composites as highly efficient low-temperature sorbents for CO2 capture

Abstract

Carbon dioxide emission from massive point sources such as industries and power plants is perceived to be a major contributor towards global warming and associated climate changes. Although lithium silicate has the highest capacity for CO2 sorption (8 mmol g−1), it is kinetically limited during the sorption process, particularly at temperatures below 500 °C. Herein, we report a facile strategy for the development of germanium-incorporated lithium silicate composites, which display enhanced CO2 absorption capacity as well as kinetics in the temperature range of 150–680 °C. The absorption capacity of 324 mg g−1 at the rate of 117 mg g−1 min−1 was measured at 680 °C, and 49 mg g−1 at the rate of 36 mg g−1 min−1 was measured at 300 °C for samples with a Si : Ge molar ratio of 1 : 0.183. This study thus highlights the possibility of employing germanium-incorporated lithium silicates for the absorption of CO2 at a wide range of temperatures, including the in situ removal of CO2 from chemical and petrochemical reactions, such as the water–gas shift reaction occurring at low temperature ranges of 150–450 °C, that has hitherto been not possible with pure Li4SiO4.

Graphical abstract: Germanium-incorporated lithium silicate composites as highly efficient low-temperature sorbents for CO2 capture

Article information

Article type
Paper
Submitted
18 جنؤری 2018
Accepted
03 اپریل 2018
First published
03 اپریل 2018

J. Mater. Chem. A, 2018,6, 7913-7921

Germanium-incorporated lithium silicate composites as highly efficient low-temperature sorbents for CO2 capture

P. V. Subha, B. N. Nair, V. Visakh, C. R. Sreerenjini, A. P. Mohamed, K. G. K. Warrier, T. Yamaguchi and U. S. Hareesh, J. Mater. Chem. A, 2018, 6, 7913 DOI: 10.1039/C8TA00576A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements