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Applicability Of Membrane Reactor For Wgs Coal Derived Gas Processing: Simulation-Based Analysis, Krzysztof J. Gosiewski, Marek Tanczyk
Applicability Of Membrane Reactor For Wgs Coal Derived Gas Processing: Simulation-Based Analysis, Krzysztof J. Gosiewski, Marek Tanczyk
Krzysztof Gosiewski
Gas from coal gasification contains less hydrogen than from other syngas production methods. An attractive option is its further hydrogen enrichment for pure hydrogen production in a membrane reactor (MR) by Water Gas Shift (WGS). The goal of present study was to analyse MR fed with coal derived gas. Simulations for feasible membrane permeation parameters revealed that to get high conversion above 90% a relatively high S/C should be applied. Moreover, hydrogen recovery is in this case low (below 30%) so for hydrogen production an additional H2 separation after the MR should have been applied. The paper also shows that …
Mathematical Simulation Of Wgs Membrane Reactor For Gas From Coal Gasification, Krzysztof J. Gosiewski, Krzysztof Warmuzinski, Marek Tanczyk
Mathematical Simulation Of Wgs Membrane Reactor For Gas From Coal Gasification, Krzysztof J. Gosiewski, Krzysztof Warmuzinski, Marek Tanczyk
Krzysztof Gosiewski
Mathematical model of a membrane reactor for the water-gas-shift (WGS) reaction and results of simulation studies are presented. The physicochemical phenomena and brief description of the model are given. Due to the fact that membranes for CO2 separation exhibit poor selectivity at the elevated temperature range (indispensable for the desired activity of WGS catalysts), the simulations were carried out only for H2 selective membranes, containing Pd or its alloys. Comparison of the conventional two-stage WGS reactor with the membrane reactor revealed that operating temperature range of the catalyst used in the membrane reactor unit has to be much wider than …
Modelling And Simulation Of Deep-Bed Grain Dryers, Johnner P. Sitompul, Istadi Istadi, I Nyoman Widiasa
Modelling And Simulation Of Deep-Bed Grain Dryers, Johnner P. Sitompul, Istadi Istadi, I Nyoman Widiasa
Istadi
This paper concerns with heterogeneous modeling of deepbed grain dryers based on two-phase model by taking into account coupled heat and mass transfer within grains. This model also consider axial mass and heat dispersion in the fluid phase. The dynamictwo-phase equations are solved numerically by finite difference with alternating direction implicit method algorithm, and then applied to simulate humidity and temperature profile of drying gas across dryers together with moisture content and temperature of grains. The capabilities of these models were compared with experimental data obtained from available literatures, under drying conditions such as temperature and absolute humidity of drying …
Inclusion Of Lubrication Forces In Dynamic Simulations, Ashok S. Sangani, Guobiao Mo
Inclusion Of Lubrication Forces In Dynamic Simulations, Ashok S. Sangani, Guobiao Mo
Ashok S. Sangani
A new method is described for incorporating close-field, lubrication forces between pairs of particles into the multiparticle Stokes flow calculations. The method is applied to the suspensions of both spherical as well as cyliridrical particles, and results computed by the method are shown to be in excellent agreement with the exact known results available in the literature.