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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...
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...
The reduction of N2O by adding biomass gas as reburning fuel is studied on a small-scale vertical reactor tube and experimental results are analyzed using the theory of chemical kinetics. The result showed that for the flue gas containing a certain concentration of N2O, when the biomass gas contained H2, CH4, CO and CO2 was used, the reburning fuel ratio should be more than 1.4%. The decomposition...
A non-stoichiometric equilibrium model was proposed to predict the performance of a biomass gasifier in this study. The model had produced satisfying results for product gas composition and lower heating value (LHV) prediction in air gasifier in comparison with data from literature. Effects of the operational parameters and fuel type (H/C and O/C) on the product gas were investigated.
In order to avoid dioxin emission from municipal solid waste combustion (MSW), chemical looping combustion was considered. The interaction between HCl and Fe2O3 was studied in this paper and experiments were carried out in a fixed bed reactor. Chlorine was measured by methyl orange spectrophotometric method. The intermediate reactions were calculated with standard Gibbs free energy and reaction equilibrium...
The pyrolysis of straw was one of the important ways for biomass utilization. Chemical structure of straw lignin had great impact on the decomposition process of straw. In this paper, lignin molecule was modeled with an average structure method and optimized with Density Functional Theory (DFT). The most stable conformations of structural units and structural model of straw lignin were obtained by...
The reduction machinism and kinetics characteristic of the reaction of carbon oxide (CO) and Nnitrous oxide (N2O), which contained the influence of reaction time on the reactants and products, were studied in the paper. The radical reaction of CO and N2O was assumped in a ideal reactor with a high temperature and a constant pressure, and was analyzed with chemical reaction kinetics theory. The result...
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