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Synergistic effects of ZnO–ZrO2@SAPO-34 core-shell catalyst in catalyzing CO2 hydrogenation for the synthesis of light olefins

Author

Listed:
  • Lu, Peng
  • Chang, Xiaoning
  • Yu, Wenjia
  • Hu, Qianwen
  • Ali, Kime Mala
  • Xing, Chuang
  • Du, Ce
  • Yang, Zhixiang
  • Chen, Shuyao

Abstract

As a method for valorizing CO2 emissions, hydrogenation of CO2 into olefins remains viable. Herein, ZnO–ZrO2 and SAPO-34 were prepared and used as bifunctional catalysts in light olefins synthesis through CO2 hydrogenation. The combination of the two components includes layered filling, physically mixing, physically grinding, and core-shell composite. Based on the evaluation, different combinations resulted in diverse product distributions. ZnO–ZrO2@SAPO-34 core-shell catalysts are better suited for promoting synergistic effects, which facilitate light olefin production. Due to the unique core-shell structure, appropriate weak acidity, and moderate basicity, the light olefins selectivity was enhanced. Further, the calcination time and core-shell mass ratio were optimized over the ZnO–ZrO2@SAPO-34 core-shell catalyst to investigate the synergistic effects between catalytic structure and catalytic performance. With a 3:1 core-shell mass ratio and 3 h of calcination at 550 °C, the optimal ZnO–ZrO2@SAPO-34 (3:1) catalyst was obtained, which exhibited 73% selectivity to light olefins with CO2 conversion of 16.1%, whereas the selectivity of CO and CH4 was lower than 44% and 1.5%, respectively. This study provides new insights into the design and optimization of ZnO–ZrO2@SAPO-34 core-shell catalysts for CO2 hydrogenation and synthesis of light olefins.

Suggested Citation

  • Lu, Peng & Chang, Xiaoning & Yu, Wenjia & Hu, Qianwen & Ali, Kime Mala & Xing, Chuang & Du, Ce & Yang, Zhixiang & Chen, Shuyao, 2023. "Synergistic effects of ZnO–ZrO2@SAPO-34 core-shell catalyst in catalyzing CO2 hydrogenation for the synthesis of light olefins," Renewable Energy, Elsevier, vol. 209(C), pages 546-557.
    • Handle: RePEc:eee:renene:v:209:y:2023:i:c:p:546-557
    DOI: 10.1016/j.renene.2023.03.111
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    References listed on IDEAS

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    1. Lu, Peng & Sun, Jian & Shen, Dongming & Yang, Ruiqin & Xing, Chuang & Lu, Chengxue & Tsubaki, Noritatsu & Shan, Shengdao, 2018. "Direct syngas conversion to liquefied petroleum gas: Importance of a multifunctional metal-zeolite interface," Applied Energy, Elsevier, vol. 209(C), pages 1-7.
    2. Ateka, Ainara & Portillo, Ander & Sánchez-Contador, Miguel & Bilbao, Javier & Aguayo, Andres T., 2021. "Macro-kinetic model for CuO–ZnO–ZrO2@SAPO-11 core-shell catalyst in the direct synthesis of DME from CO/CO2," Renewable Energy, Elsevier, vol. 169(C), pages 1242-1251.
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