Volume 46, Issue 3 pp. 2810-2825
RESEARCH ARTICLE

Study on the reaction performance of Ce-doped NiFe2O4 oxygen carriers in the process of chemical looping hydrogen production

Jie Gao

Jie Gao

Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, China

School of Energy and Power Engineering, Chongqing University, Chongqing, China

Search for more papers by this author
Ge Pu

Corresponding Author

Ge Pu

Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, China

School of Energy and Power Engineering, Chongqing University, Chongqing, China

Correspondence

Ge Pu, Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China.

Email: [email protected]

Search for more papers by this author
Pengcheng Wang

Pengcheng Wang

Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, China

School of Energy and Power Engineering, Chongqing University, Chongqing, China

Search for more papers by this author
Cong Yuan

Cong Yuan

Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, China

School of Energy and Power Engineering, Chongqing University, Chongqing, China

Search for more papers by this author
Shuaihui Jia

Shuaihui Jia

Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, China

School of Energy and Power Engineering, Chongqing University, Chongqing, China

Search for more papers by this author
First published: 07 October 2021
Citations: 18

Funding information: The Chongqing Science and Technology Commission, Grant/Award Number: project no. cstc2016zdcy-ztzx0024

Summary

Chemical looping hydrogen production is a kind of hydrogen production technology with great potential. NiFe2O4 is one of the oxygen carriers with the best comprehensive hydrogen production performance, but the oxygen carrier still has the disadvantages of low hydrogen production and poor reaction stability. In this paper, a small amount of Ce was doped in the oxygen carrier to improve the hydrogen production efficiency. And the reaction stability of the oxygen carrier was improved by loading an inert carrier. The experimental results showed that the 6 wt% Ce-NiFe2O4 oxygen carrier had the highest H2 yield, and the hydrogen yield per unit mass of oxygen carrier was increased from 194 to 367 mL/g. Thermodynamic simulation and characterization results showed that the doping of Ce could enhance the oxygen release capacity and hydrogen production capacity. In the cyclic experiment, due to the damage of the oxygen carrier spinel structure and the sintering of oxygen carrier particles, the reaction activity of the 6 wt% Ce-NiFe2O4 oxygen carrier gradually reduced and the hydrogen production in the steam reactor decreased significantly after 15 cycles. After the loading of Al2O3 inert support on the 6 wt% Ce-NiFe2O4 oxygen carrier, the hydrogen production was greatly improved and remained stable after 15 cycles. The modification of the oxygen carrier could not only increase the hydrogen production but also the economic efficiency for the reduced amount of Ce and Ni.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.