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Hydrogen production based on chemical looping combustion can obtain clean hydrogen with near zero emission of carbon dioxide. This technique can be auto-thermal, making it very promising for hydrogen production. In this paper, the interconnected fluidized beds were established for cold model study, and tests were carried out, aiming at providing some design information for the hot bench. Experiments...
Numerical simulation of gas-solid flow in fluidized bed has been carried out based on two-fluid model (TFM) in the paper. The influence of different height of bed material, superficial velocity, restitution coefficient of granular elasticity, drag model and time step calculated on phase mixing and bubbles appeared was analyzed and investigated. The results showed that by using the same drag model,...
Chemical looping combustion (CLC) was a promising combustion technology with inherent separation of CO2. In this paper, thermodynamic equilibrium approach was used to investigate the reactions between CO or biomass gas and oxygen carrier Fe2O3, and experiments were carried out in a laboratory fluidized bed reactor. The results showed that when temperature was below 1000 K, the carbon deposition on...
A process model was proposed to predict the combustion of coal in a 300 MW CFB boiler. The effects of coal feed flow rate, the temperature of preheated air and air flow rate on the exhaust gas temperature were analyzed. The result showed that the exhaust gas temperature and boiler efficiency was consistent with data from literature.
Chemical-looping combustion (CLC) is a new method for the combustion of fuel gas with inherent separation of carbon dioxide. The cold interconnected fluidized beds (Oslash100) were set-up for the hot model design in this work. The pressure drop of both air reactor (AR) and fuel reactor (FR) were measured and used for CLC system design. The effects of superficial gas velocity on pressure distribution...
Based on the ASPEN PLUS simulation platform, drying and fluidized bed incineration process of mechanically dewatered sludge with 70% moisture content was simulated. Compared with other calculation methods, this method could achieve sludge incineration simulation rapidly, and could further optimize the technology or adjust the stream parameter conveniently. The results obtained showed that: The heat...
The experimental research on removing N2O with biomass gas was carried out in a small-fluidized bed reactor tube. The decomposition rate of N2O and the production rate of NO impacted by reaction temperature, residence time, reburning position, rate of fuel, initial oxygen content of flue gas and the height of material bed were researched. The results showed that the decomposition rate of N2O was more...
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