Revealing the effect of synthetic method on integrated CO2 capture and conversion performance of Ni-Na2ZrO3 bifunctional materials

• Published in: Separation and purification technology Vol. 346; p. 127534
• Main Authors: Chu, Jie, Liang, Chen, Xue, Wenyan, Huang, Pu, Guo, Yafei, Wang, Ruilin, Sun, Jian, Li, Weiling, Zhao, Chuanwen
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 30.10.2024
• Subjects: Integrated CO2 capture and conversion; Ni-Na2ZrO3 bifunctional materials; Reverse water gas shift (RWGS) reaction; Structure–property-activity relationships; Synthesis method; Synthesis method; Structure–property-activity relationships; Integrated CO2 capture and conversion; Reverse water gas shift (RWGS) reaction; Ni-Na2ZrO3 bifunctional materials
• ISSN: 1383-5866
• DOI: 10.1016/j.seppur.2024.127534

•Ni-Na2ZrO3 bifunctional materials were prepared by different synthetic modes.•Integrated CO2 capture and RWGS performance for CO production was evaluated.•Structure-property-activity relationships of Ni-Na2ZrO3 samples were clarified.•Detailed reaction paths of ICCU-RWGS over Ni-Na2ZrO3 was illustrated. Integrated CO2 capture and utilization by reverse water gas shift (ICCU-RWGS) reaction for syngas production for C1 chemical industry has gained increasing attention. Designing highly active bifunctional materials that enables CO2 adsorption and in-situ conversion is essential. In this work, Ni-Na2ZrO3 bifunctional materials are prepared by different synthetic methods for ICCU-RWGS. N2 physisorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), CO2 temperature-programmed desorption (CO2-TPD) and H2 temperature-programmed reduction (H2-TPR) analysis reveals that Ni-Na2ZrO3-CP prepared by the co-precipitation (CP) method shows small Ni crystalline size, moderate surface basicity, and excellent reducibility. ICCU-RWGS performance is investigated under isothermal conditions of 650 °C, 10 %CO2 and 35 %H2. The results indicate that Ni-Na2ZrO3-CP demonstrates excellent performance in ICCU-RWGS, with a notable CO2 capture capacity of 3.76 mmol CO2/g and a CO production rate of 3.10 mmol CO/g. Additionally, it exhibits relatively good operational stability. Detailed reaction paths of the ICCU-RWGS procedure for the Ni-Na2ZrO3 bifunctional materials are proposed. The findings will shed new perspectives on the design of synthetic bifunctional catalysts for ICCU-RWGS.