Synthesis of Ag promoted porous Fe3O4 microspheres with tunable pore size as catalysts for Fischer-Tropsch production of lower olefins

Ag promoted porous Fe3O4 microspheres with tunable pore size were synthesized via one-pot solvothermal method and employed as catalysts for Fischer-Tropsch synthesis. The introduction of Ag played an important role in regulating the pore size of catalysts and the dispersion of Fe. Comparable to unmodified catalyst in this system, Ag promoted Fe-based catalysts displayed excellent selectivity to lower olefins, particularly for Fe-0.9Ag with smaller pore size of 133 nm and Fe dispersion of 10.1%. The maximum selectivity to C-2 through C-4 olefins was 43.0 wt%, and the selectivity to CH4 was low to 14.8 wt.%. (C) 2015 Elsevier B.V. All rights reserved.

[1]  Younan Xia,et al.  Large‐Scale Synthesis of Uniform Silver Nanowires Through a Soft, Self‐Seeding, Polyol Process , 2002 .

[2]  Burtron H. Davis,et al.  Fischer-Tropsch synthesis: relationship between iron catalyst composition and process variables , 2003 .

[3]  Y. Yoneyama,et al.  Preparation of hierarchically meso-macroporous hematite Fe2O3 using PMMA as imprint template and its reaction performance for Fischer–Tropsch synthesis , 2011 .

[4]  Yuhan Sun,et al.  A large pore-size mesoporous zirconia supported cobalt catalyst with good performance in Fischer–Tropsch synthesis , 2007 .

[5]  R. Cooks,et al.  Peptide fragmentation assisted by surfaces treated with a low-temperature plasma in nanoESI. , 2008, Angewandte Chemie.

[6]  Abhaya K. Datye,et al.  Phase Transformations in Iron Fischer–Tropsch Catalysts during Temperature-Programmed Reduction , 2000 .

[7]  Rocco Anthony Fiato,et al.  Activity and selectivity control in iron catalyzed Fischer-Tropsch synthesis , 1990 .

[8]  Jinlin Li,et al.  Preparation and Catalytic Activity for Fischer−Tropsch Synthesis of Ru Nanoparticles Confined in the Channels of Mesoporous SBA-15 , 2008 .

[9]  J. Bitter,et al.  Supported Iron Nanoparticles as Catalysts for Sustainable Production of Lower Olefins , 2012, Science.

[10]  Ning Zhang,et al.  Selective Synthesis and Properties of Monodisperse Zn Ferrite Hollow Nanospheres and Nanosheets , 2008 .

[11]  Ting Fan,et al.  Study on Formation Mechanism by Monitoring the Morphology and Structure Evolution of Nearly Monodispersed Fe3O4 Submicroparticles with Controlled Particle Sizes , 2011 .

[12]  M. Baerns,et al.  Iron/manganese oxide catalysts for fischer-tropsch synthesis: Part I: structural and textural changes by calcination, reduction and synthesis , 1983 .

[13]  W. Bauer.  II. Zur Frage der Rohstoffversorgung Deutschlands , 1934 .

[14]  C. H. Bartholomew,et al.  Effects of crystallite size and support on the carbon monoxide hydrogenation activity/selectivity properties of iron/carbon , 1986 .

[15]  Qinghong Zhang,et al.  Development of Novel Catalysts for Fischer–Tropsch Synthesis: Tuning the Product Selectivity , 2010 .

[16]  Lian Gao,et al.  Morphological Transformation of Fe3O4 Spherical Aggregates from Solid to Hollow and Their Self-Assembly under an External Magnetic Field , 2008 .

[17]  Yunfeng Lu,et al.  Mesoporous titania spheres with tunable chamber stucture and enhanced photocatalytic activity. , 2007, Journal of the American Chemical Society.