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Study On Hydrogen Production From Partly Oxidation & Pyrolysis Of Hydrogen Sulfide Under Super-adiabatic Combustion Temperature By Porous Media Burner

Posted on:2007-10-25Degree:MasterType:Thesis
Country:ChinaCandidate:Z X WangFull Text:PDF
GTID:2132360185487895Subject:Engineering Thermal Physics
Abstract/Summary:PDF Full Text Request
With increasing tension of energy sources and severity of air pollution, we need to adopt clean and effective combustion technology and make full use of energy. In recent years, porous media combustion, as a new kind of combustion technology, characterized by super-adiabatic combustion temperature, low pollutants emission, strong thermal radiation and steady combustion, has been developing very fast. It also has other advantages, such as low-volume burner, compact configuration, and wide load adjustment range. The purpose of this article is to obtain both hydrogen and sulfur from hydrogen sulfide using the porous media combustion technology. This new technology may be expected to substitute the traditional Claus process. The main contents are as follows:Firstly, the research on porous media combustion technology was analyzed. The mention, principle, classification and application of this combustion technology were all introduced in detail.Secondly, chemical simulation and experimental study were carried out on the pyrolysis of hydrogen sulfide. The principle and classification of hydrogen sulfide pyrolysis were summarized at first. Then the influence of initial parameters, such as pyrolysis temperature, pressure and initial concentration of hydrogen sulfide, on the equilibrium composition of hydrogen sulfide pyrolysis were chemically simulated by FACTS AGE. The experimental study of hydrogen sulfide pyrolysis was carried out in a quartz-tube reactor. The influence of pyrolysis temperature and residence time on the decomposition ratio of hydrogen sulfide was studied. The result showed that the decomposition ratio depended mostly on pyrolysis temperature, a relatively good hydrogen production result can be obtained when temperature is fairly high. And time is the main factor influencing the equilibrium of hydrogen sulfide pyrolysis when temperature is low. With temperature increasing, it becomes the main factor influencing the equilibrium.Thirdly, numerical simulation was processed on the partly oxidation and pyrolysis of hydrogen sulfide under super-adiabatic combustion temperature by FACTS AGE and CHEMKIN. The influence of equivalence ratio, initial concentration of hydrogen sulfide and oxygen concentration of oxidant on the equilibrium composition of partly oxidation and pyrolysis of hydrogen sulfide was analyzed by FACTSAGE. And following this, numerical simulation was progressed on the hydrogen production from partly oxidation and pyrolysis of hydrogen sulfide under super-adiabatic combustion temperature in porous media. It was found to be a relatively good simulation result compared with the experimental data provided by others. And then kinetic study on hydrogen production from the reaction of excessive hydrogen sulfide and air was simulated by CHEMKIN. The result showed that...
Keywords/Search Tags:porous media combustion, super-adiabatic combustion, pyrolysis, thermodynamics, kinetics, propagation velocity
PDF Full Text Request
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