Volume 5: Innovative Solutions for Energy Transitions: Part IV

Chemical-Looping Oxygen Transfer Properties of Perovskite-Type Catalyst LA1-YCAYCU0.1NI0.9O3 Qiongqiong Jiang, Yali Cao, Xiangyu Liu, Hao Zhang, Hui Hong, Hongguang Jin

Abstract

This paper studies the experimental results of perovskite-based chemical looping combustion (CLC). Chemical looping combustion is a kind of combustion that can separate the fuel from air and avoid the mix of carbon oxide and air. This concept can realize the carbon oxide separation and storage without penalty. That key of CLC is focused on the oxygen carrier, e.g., metal oxide and perovskite. The study aims to assess the performance of a novel perovskite-type oxide as the oxygen carrier. We synthesized a series of La1- yCayCu0.1Ni0.9O3 (x=0, 0.1, 0.5, 0.9) by combustion method. These materials were characterized by using SEM, XRD, BET for unveiling the morphology, structure, and particle properties. Experiments were executed to investigate the reactivity of the redox materials in the thermogravimetric analyzer (TGA) in the respects of oxygen capacity, stability, and regenerability. Isothermal reaction and redox cycles are demanded to evaluate the performance. Hydrogen and methane as the fuel are both considered in this study. Besides, the effect of the temperature from 400 to 800 oC and the redox cycles were evaluated. The La1-yCayCu0.1Ni0.9O3 showed favorable reactivity in the CLC and achieved stable properties in the reaction cycles. The experimental results for CLC indicate that the La1-yCayCu0.1Ni0.9O3 has the potential to be used as the oxygen carriers for CLC system.

Keywords chemical looping combustion; perovskitetype oxides; Hydrogen, oxygen transfer