【摘 要】
：
Nanosized Fe-Co catalysts were prepared by co-precipitation method and studied for the conversion of synthesis gas to light olefins.In particular,the effects of
【机 构】
：
Faculty of Chemistry, Department of Materials Science
论文部分内容阅读
Nanosized Fe-Co catalysts were prepared by co-precipitation method and studied for the conversion of synthesis gas to light olefins.In particular,the effects of a range of preparation variables such as Co/Fe molar ratios of the precipitation solution,pH value of precipitate,temperature of precipitation,promoters and loading of optimum promoter on the structure and catalytic performance are investigated.The optimal nano catalyst for light olefins (C2-C4) production was obtained overthe catalyst with Co/Fe molar ratio of 3/1 which promoted with 2 wt％ K.The results show that the best operational conditions were GHSV =2200 h-1 (H2/CO =2/1) at 260 ℃ under atmospheric pressure.Characterization of catalysts were carried out using X-ray diffraction (XRD),thermal gravimetric analysis (TGA),differential scanning calorimetry (DSC),scanning electron microscopy (SEM),transmission electron microscopy (TEM) and N2 physisorption measurements such as BrunauerEmmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) methods.
其他文献
In this paper, it was found that Ru(H2bpp)2(PF6)2 (H2bpp = 2,6-bis(pyrazol-3-yl)pyridine) complex had excellent electrochemical activity at the carbon paste ele
In the present paper,compactions of time-dependent viscous granular materials are simulated step by step using the automatic adaptive mesh generation schemes.In
N1,N2-Bis [1-(2-hydroxyphenyl)methylidene]ethanedihydrazide (MEH) was used as new compound which plays the role of an excellent ion carrier in the fabrication o
β-PbO2 electrodes were prepared by electro-deposition and characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, a
Background The durable presence of polymer coating on drug-eluting stent (DES) surface may be one of the principal reasons for stent thrombosis. The long-term c
The hydrodynamics of a single jet and four tandem jets in a cross flow are simulated by using the Computational Fluid Dynamics (CFD) software Fluent.The realiza
The behavior of the solid phase in the upper zone of a circulating fluidized bed riser was studied using a phase Doppler anemometer,Glass particles of mean diam
A new triterpene saponin with 28-nor-urs-12(13),18(17)-dien-3β-ol as aglycone, named ilexsaponin C (1) was isolated from the roots of Ilex pubescens, together
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7