A new CO₂-resistant Ruddlesden-Popper oxide with superior oxygen transport

A-site deficient (Pr_0.9La_0.1)_1.9(Ni_0.74Cu_0.21Ga_0.05)O_4+δ

authored by

Jian Xue, Qing Liao, Wei Chen, Henny J.M. Bouwmeester, Haihui Wang, Armin Feldhoff

Abstract

A-site deficient (Pr_0.9La_0.1)_1.9Ni_0.74Cu_0.21Ga_0.05O_4+δ ((PL)_1.9NCG), with the K₂NiF₄ structure, is found to exhibit higher oxygen transport rates compared with its cation-stoichiometric parent phase. A stable oxygen permeation flux of 4.6 × 10^-7 mol cm^-2 s^-1 at 900 °C at a membrane thickness of 0.6 mm is measured, using either helium or pure CO₂ as sweep gas at a flow rate of 30 mL min^-1. The oxygen flux is more than two times higher than that observed through A-site stoichiometric (PL)_2.0NCG membranes operated under similar conditions. The high oxygen transport rates found for (PL)_1.9NCG are attributed to highly mobile oxygen vacancies, compensating A-site deficiency. The high stability against carbonation gives (PL)_1.9NCG potential for use, e.g., as a membrane in oxy-fuel combustion processes with CO₂ capture.

Organisation(s)

Institute of Physical Chemistry and Electrochemistry

External Organisation(s)

South China University of Technology
University of Twente
University of Adelaide

Type

Article

Journal

Journal of Materials Chemistry A

Volume

3

Pages

19107-19114

No. of pages

8

ISSN

2050-7488

Publication date

10.08.2015

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Chemistry, Renewable Energy, Sustainability and the Environment, General Materials Science

Sustainable Development Goals

SDG 7 - Affordable and Clean Energy

Electronic version(s)

https://www.repo.uni-hannover.de/bitstream/123456789/152/1/c5ta02514a.pdf (Access: Open)
https://doi.org/10.1039/c5ta02514a (Access: Closed)