CIESC Journal ›› 2020, Vol. 71 ›› Issue (10): 4652-4662.doi: 10.11949/0438-1157.20200653

• Catalysis, kinetics and reactors • Previous Articles     Next Articles

Effects of identities of supports on Fe-based catalyst and their consequences on activities of CO2 hydrogenation to olefins

Yangyang LIU1(),Chao SUN2,Malhi Haripal Singh1,Chongyang WEI1,Zhenzhou ZHANG2(),Weifeng TU1,2()   

  1. 1.Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education, Zhengzhou University, Zhengzhou 450001, Henan, China
    2.School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China
  • Received:2020-05-25 Revised:2020-08-14 Online:2020-10-05 Published:2020-08-26
  • Contact: Zhenzhou ZHANG,Weifeng TU;;


The direct synthesis of olefins by CO2 hydrogenation with iron-based catalysts is one of the best ways to achieve CO2 emission reduction and CO2 conversion and utilization. At present, the CO2 hydrogenation activity and structural strength of the iron-based catalysts are still relatively low during CO2 hydrogenation process, which has become an important challenge for the industrialization of CO2 hydrogenation to olefins. In this work, a series of the supported iron-based catalyst was prepared by the impregnation method to study the influence of the properties of support materials on the structure of iron-based catalysts and the reactivities of the direct synthesis of olefins from CO2 hydrogenation. This work found that the support induced the iron species formed during the process of CO2 hydrogenation, simultaneously affected the order degree of carbon species on the surface of iron-based catalyst, and tuned the capability of CO2 adsorption and the activities of CO2 activation. The results shown that the Fe-based catalyst supported on ZrO2 exhibited the best catalytic performance for CO2 hydrogenation to olefins at 320℃ and 2.0 MPa. The CO2 conversion (>30%) and the selectivity of olefins in C2—C7 hydrocarbon products were as high as over 85%, the ratio of olefins to paraffins was 8.2, and the CO selectivity was 17.1%.

Key words: carbon dioxide, hydrogenation, catalyst, support, olefins, iron species, alkali metal, Na, surface carbon species

CLC Number: 

  • O 643.3


Catalytic performance of the Fe based catalysts supported on different supports for CO2 hydrogenation [reaction conditions:320℃, 2.0 MPa, CO2/H2/Ar =1/3/3 and GHSV=9000 ml/(g·h)]"

Table 1

Performance of supported Fe catalysts for CO2 hydrogenation"









C2~C7= 时空产率/(g/(kg·h))

Table 2

Physicochemical properties of supports and supported Fe catalysts"






平均孔径d /nmFe2O3尺寸/nm


CO-TPR profiles of Fe-based catalyst precursor on different supports"


XRD patterns of Fe-based catalyst on different supports [reaction conditions:320℃, 2 MPa, CO2/H2/Ar =1/3/3 and GHSV=9000 ml/(g·h)]"


Raman spectra of Fe-based catalyst on different supports [reaction conditions:320℃, 2 MPa, CO2/H2/Ar =1/3/3 and GHSV=9000 ml/(g·h)]"


FTIR spectra of H2 pretreated supports and catalysts after CO2 adsorption and stabilization in Ar flow at 50℃"


Schematic diagram of the effect of supports on the evolution of iron species and consequent tuning the hydrogenation of CO2 to olefins"

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