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Fischer-Tropsch synthesis over Modified Cobalt Catalysts

过程工程学报 2006年第4期6卷 656-660页

作者：李增喜聂志勤王蕾张香平张锁江 Graduate University of Chinese Academy of Sciences Group for Green Chemistry and Technology Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China School of Science and Technology Tsinghua University Group for Green Chemistry and Technology Institute of Process Engineering Chinese Academy of Sciences

The catalysts of Co/Zr-SiO2 were prepared by precipitation and the promoter of Pt was supported by *** reducibility of the cobalt oxide and the other physicochemical properties of the catalysts were characterized by TPR,TPD,BET and *** the evaluation of the reduction temperature,the reduction degree increased but the surface area of the catalysts and the adsorption property for reactant CO distinctly decreased;The addition of Pt resulted in the improvement of the reducibility by decreasing the reduction temperature of cobalt oxide *** ft-synthesis has been performed in a quartz fixed-bed reactor,and the experimental results showed that the best activity for promoted catalyst has been found at the reduction temperature of 400℃,in spite of its uncompleted reduction.

关键词： ft synthesis cobalt reduction XPS

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synthesis and characterization of multiwall carbon nanotubes/alumina nanohybrid-supported cobalt catalyst in Fischer-Tropsch synthesis

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Journal of Energy Chemistry 2013年第4期22卷 582-590页

作者： Ali Karimi Bahram Nasernejad Ali Morad Rashidi Chemical Engineering Department Amir Kabir University of Technology Nanotechnology Research Center Research Institute of Petroleum Industry

Multiwall carbon nanotubes （MWNTs） and alumina are combined to give a new type of nanohybrid for Fisher-Tropsch synthesis （ftS） catalyst support. Alumina nano-particles （10 wt%） were introduced directly on functionalized MWNTs by a modified sol-gel method. Microstructure observations show that alumina particles were homogeneously dispersed on the inside and outside of modified MWNTs surfaces. 15 wt% cobalt loading catalysts were prepared with this nanohybrid and γ-alumina as a reference, using a sol-gel technique and wet impregnation method respectively. These catalysts were characterized by TEM, XRD, N2-adsorption, H2 chemisorption and TPR. The deposition of cobalt nanoparticles synthesized by sol-gel technique on the MWNTs nanohybrid shift the reduction peaks to a low temperature, indicating higher reducibility for uniform cobalt particles. Nanohybrid also aided in high dispersion of metal clusters and high stability and performance of catalyst. The proposed MWNTs nanohybrid-supported cobalt catalysts showed the improved ftS rate （gHc/（***））, CO conversion （%）, and water gas shift rate （WGS）（gcoz/（gcat.h）） of 0.012, 52, and 30E-3, respectively, as compared to those of 0.007, 25, and 18E-3, respectively, on the γ-alumina-supported cobalt catalysts with the same Co loading.

关键词： carbon nanotubes nanohybrid cobalt catalyst alumina ft synthesis sol-gel

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THE CONVERSION OF SYNGAS ON Fe／MnOⅡ．The Role of K in Modified Fe／MnO Catalysts

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Chinese Journal of Catalysis 1996年第5期 42-45页

作者： Guan Naijia (Department of Chemistry, Nankai University, Tianjin 300071)

ＴＨＥＣＯＮＶＥＲＳＩＯＮＯＦＳＹＮＧＡＳＯＮＦｅ／ＭｎＯⅡ．ＴｈｅＲｏｌｅｏｆＫｉｎＭｏｄｉｆｉｅｄＦｅ／ＭｎＯＣａｔａｌｙｓｔｓＧｕａｎＮａｉｊｉａ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＮａｎｋａｉＵｎｉ... 详细信息

ＴＨＥＣＯＮＶＥＲＳＩＯＮＯＦＳＹＮＧＡＳＯＮＦｅ／ＭｎＯⅡ．ＴｈｅＲｏｌｅｏｆＫｉｎＭｏｄｉｆｉｅｄＦｅ／ＭｎＯＣａｔａｌｙｓｔｓＧｕａｎＮａｉｊｉａ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＮａｎｋａｉＵｎｉｖｅｒｓｉｔｙ，Ｔｉａｎｊｉｎ３０...

关键词： ft synthesis Fe/MnO catalysts Potassium Promoter XPS

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STUDY OF THE COPRECIPITATED IRON/MANGANESE FISCHER-TROPSCH CATALYSTS

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Journal of Energy Chemistry 1996年第2期 152-160页

作者： REN Qi-Zhi ZHANG Zhi-Xin ZHOU Jing-Lai (Institute of Coal Chemistry The Chinese Academy of Sctences Taiyuan, Shanxi 030001 To whom correspondence should be addressed)

The structure of Fe/Mn catalysts after calcination, reduction and ft synthesis was investigated by means of MES and XRD. With the increase of Mn content, the catalysts gradually changed from magnetic to superparamagnetic state. Therefore, the reduction of catalysts was *** performance of catalysts may be related with the structure of spinel (Fel-y Mny,)3O4 and the value of y. The presence of MnCO3 and MnO could also favor the ft performance. In iron-rich and manganese-rich catalysts, Mn mainly acted as an electronic and structural promoter respectively. For the latter samples, more complex phases were present and lnorc reactions were in competition during the ft performance.

关键词： ft synthesis co-precipitated Fe/Mn catalyst solid solution

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