• Journal of Inorganic Materials
  • Vol. 36, Issue 10, 1053 (2021)
LIU Qiang, DING Jie*, JI Guojing, HU Juanmin, GU Hao, and ZHONG Qin*
Author Affiliations
  • School Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
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    In recent years, with the consumption of fossil resources and the large amount of CO2 emissions, the energy crisis and the greenhouse question become deeply serious. The direct synthesis of olefins by CO2 hydrogenation with iron-based catalysts is one of the best ways to achieve CO2 reduction. In this study, zirconia (ZrO2)-supported iron-cobalt catalyst (Fe-Co/ZrO2) and ZrO2-supported iron-cobalt-potassium catalyst (Fe-Co-K/ZrO2) were prepared by impregnation method, which were used for CO2 hydrogenation to light olefins (C2=-C4=), and the effect of K on the catalytic activity were investigated emphatically. At the condition of 300 ℃ and 1.5 MPa, the activity test show that addition of K increases the CO2 conversion from 40.8% to 44.8%, improves the selectivity of light olefins from 0.23% to 68.5%, and raises the stability of catalytic performance. The characterization results show that introduction of K improves electron cloud density of the iron species, enhances adsorption strength of the Fe to CO2, promotes the formation of iron carbide, and facilitates direct dissociation of CO2 after adsorption on Fe species, thus boosts the performance of CO2 hydrogenation to light olefins.

    近年来, 随着化石资源的大量燃烧和CO2排放量的增长, 温室效应日益严重。为了减少温室效应, 科研工作者们围绕CO2捕集与利用开展了大量研究工作[1]。低碳烯烃是一种重要的化工原料, 被广泛用于合成树脂、合成橡胶和合成纤维的生产。随着石油资源的枯竭和低碳烯烃需求量的增大, 传统的低碳烯烃生产方式如石脑油裂解等已无法满足现代工业的发展需求。为此, 研究者开展了将CO2与可再生的H2相结合制备低碳烯烃的研究工作[2]

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    Qiang LIU, Jie DING, Guojing JI, Juanmin HU, Hao GU, Qin ZHONG. Fe-Co-K/ZrO2 Catalytic Performance of CO2 Hydrogenation to Light Olefins [J]. Journal of Inorganic Materials, 2021, 36(10): 1053
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    Received: Jan. 25, 2021
    Accepted: --
    Published Online: Nov. 26, 2021
    The Author Email: DING Jie (tonlyjding@njust.edu.cn), ZHONG Qin (zq304@njust.edu.cn)