Fischer-Tropsch synthesis model

TI Carbon monoxide hydrogenation over cobalt catalyst in a tube-wall reactor Part II Modeling studies KW Fischer Tropsch synthesis modeling, carbon monoxide hydrogenation cobalt catalyst, tube wall reactor Fischer Tropsch reaction IT Hydrogenation catalysts... 

The formation of relatively stable vesicles did not require the presence of pure compounds mixtures of components could also have done the job. However, whether the concentrations of the compounds isolated from the Murchison meteorite would have been sufficient for the formation of prebiotic protocells or vesicles is unclear, even if concentration effects are assumed. Sequences in which the technical Fischer-Tropsch synthesis is the role model have been proposed as possible sources of amphiphilic building blocks. 

Saib, A. M., Borgna, A., van de Loosdrecht, J., van Berge, P. J., and Niemantsverdriet, J. W. 2006. In situ surface oxidation study of a planar Co/SiO2/Si(100) model catalyst with nanosized cobalt crystallites under model Fischer-Tropsch synthesis conditions. J. Phys. Chem. B 110 8657-64. 

The aim of this work was to apply combined temperature-programmed reduction (TPR)/x-ray absorption fine-structure (XAFS) spectroscopy to provide clear evidence regarding the manner in which common promoters (e.g., Cu and alkali, like K) operate during the activation of iron-based Fischer-Tropsch synthesis catalysts. In addition, it was of interest to compare results obtained by EXAFS with earlier ones obtained by Mossbauer spectroscopy to shed light on the possible types of iron carbides formed. To that end, model spectra were generated based on the existing crystallography literature for four carbide compounds of... 

FIGURE 9.11 Ideal polymerization model of Fischer-Tropsch synthesis and ideal Fischer-Tropsch product composition. 

Pore Diffusion Modeling in Fischer-Tropsch Synthesis.219... 

Taking these effects into account, internal pore diffusion was modeled on the basis of a wax-filled cylindrical single catalyst pore by using experimental data. The modeling was accomplished by a three-dimensional finite element method as well as by a respective differential-algebraic system. Since the Fischer-Tropsch synthesis is a rather complex reaction, an evaluation of pore diffusion limitations... 

PORE DIFFUSION MODELING IN FISCHER-TROPSCH SYNTHESIS... 

Xu, B. L., Fan, Y. N., Zhang, Y., Tsubaki, N. 2005. Pore diffusion simulation model of bimodal catalyst for Fischer-Tropsch synthesis. AIChE Journal 51 2068-76. 

Van der Laan, G.P., Beenackers, A.A.C.M. 1999. Hydrocarbon selectivity model for the gas-solid Fischer-Tropsch synthesis on precipitated iron catalysts. Ind. Eng. Chem. Res. 38 1277. 

Botes, F.G. 2007. Proposal of a new product characterisation model for the iron-based low-temperature Fischer Tropsch synthesis. Energy Fuels 21 1379. 

Detailed Kinetic Study and Modeling of the Fischer-Tropsch Synthesis over a State-of-the-Art Cobalt-Based Catalyst... 

In this work, a detailed kinetic model for the Fischer-Tropsch synthesis (FTS) has been developed. Based on the analysis of the literature data concerning the FT reaction mechanism and on the results we obtained from chemical enrichment experiments, we have first defined a detailed FT mechanism for a cobalt-based catalyst, explaining the synthesis of each product through the evolution of adsorbed reaction intermediates. Moreover, appropriate rate laws have been attributed to each reaction step and the resulting kinetic scheme fitted to a comprehensive set of FT data describing the effect of process conditions on catalyst activity and selectivity in the range of process conditions typical of industrial operations. 

Kinetic Study and Modeling of the Fischer-Tropsch Synthesis... 

Visconti, C.G., Tronconi, E., Lietti, L., Zennaro, R., and Forzatti, P. 2007. Development of a complete kinetic model for the Fischer-Tropsch synthesis over Co/A1203 catalysts. Chem. Eng. Sci. 62 5338 -3. 

S. Storsaeter, D. Chen and A. Holmen, Microkinetic modelling of the formation of Cj and C2 products in the Fischer-Tropsch synthesis over cobalt catalysts, Surf. Sci., 2006, 600, 2051-2063. 

C. Aaserud, Model studies of secondary hydrogenation in Fischer-Tropsch synthesis studied by cobalt catalysts, Thesis, NTNU, Trondheim, 2003. 

In 1976 he was appointed to Associate Professor for Technical Chemistry at the University Hannover. His research group experimentally investigated the interrelation of adsorption, transfer processes and chemical reaction in bubble columns by means of various model reactions a) the formation of tertiary-butanol from isobutene in the presence of sulphuric acid as a catalyst b) the absorption and interphase mass transfer of CO2 in the presence and absence of the enzyme carboanhydrase c) chlorination of toluene d) Fischer-Tropsch synthesis. Based on these data, the processes were mathematically modelled Fluid dynamic properties in Fischer-Tropsch Slurry Reactors were evaluated and mass transfer limitation of the process was proved. In addition, the solubiHties of oxygen and CO2 in various aqueous solutions and those of chlorine in benzene and toluene were determined. Within the framework of development of a process for reconditioning of nuclear fuel wastes the kinetics of the denitration of efQuents with formic acid was investigated. 

C. Maretto, R. Krishna, Modeling of a bubble column slurry reactor for Fischer-Tropsch synthesis, Catal. Today 52 (1999) 279-289. 

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