Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (08): 1943-1950.doi: 10.3866/PKU.WHXB201206051

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Properties of the Nano-Particle Fe-based Catalyst for the Hydrogenation of Carbon Dioxide to Hydrocarbons

ZHENG Bin1, ZHANG An-Feng1, LIU Min1, DING Fan-Shu1, DAI Cheng-Yi1, SONG Chun-Shan1,2, GUO Xin-Wen1   

  1. 1. State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China;
    2. EMS Energy Institute and Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania, 16802, USA
  • Received:2012-03-10 Revised:2012-06-04 Published:2012-07-10
  • Contact: SONG Chun-Shan, GUO Xin-Wen E-mail:guoxw@dlut.edu.cn; csong@psu.edu

Abstract:

Combining co-precipitation-gelation, mechanical mixing and impregnation methods, a series of catalysts of FeK-M/γ-Al2O3(M=Cd or Cu) have been attained. The catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 physisorption, X-ray diffraction (XRD) and temperature-programmed reduction of hydrogen (H2-TPR). The hydrogenation of carbon dioxide over these catalysts was also investigated in a fixed bed. Given a reaction time of 100 h, CO2 conversion over a 15%Fe/10%K/γ-Al2O3 catalyst reached 51.3 %, with a selectivity towards C2+ of 62.6 % at 3 MPa, 673 K, a space velocity of 3600 h-1 and at a molar ratio of H2/CO2 of 3. At the lower Fe content of 2.5%, the selectivity towards C2+ was still greater than 60.0%. Increasing the potassium content from 0% to 10%, increased the selectivity towards C2-C4= and the molar ratio of C2-C4= /C2-C40 increased to 3.6. The addition of Cd and Cu improved the reduction and catalytic activities. Specifically, Cu improved the molar ratio of C2-C4= /C2-C40 from 3.6 to 5.4, and the Cd increased the selectivity of C5+ by 12%.

Key words: Carbon dioxide, Hydrogenation, Fe-based catalyst, Precipitation, Light hydrocarbons

MSC2000: 

  • O643