A Preliminary Study On The Coal Chemical Looping Combustion Of Organic Matter Generates

Chemical-looping combustion research is rapid developing and is the focus of research at domestic and foreign, the chemical looping combustion of organic pollutants also began to receive more attention. Main experimental study of16PAHs the CLC system FR flue gas distribution characteristics, including the proportion of each ring PAHs, and low (2-3),(4),(5-6) aromatics proportion. Actors include the different combustion temperatures, different oxygen carrier prepared from different coal, oxygen carrier and coal different equivalence ratios and different degree of vacuum, heating rate under the influence.In this paper, make the CuO/Al2O3oxygen carrier in mechanical mixing, impregnation and co-precipitation with coal samples mixed analog tubular chemical-looping combustion device for burning resin adsorption of PAHs by Sechelt extraction, rotation evaporation, and chromatography pretreatment, the last generation FID gas chromatography PAHs. Make the analysis of its composition, the distribution of the number of rings as well as the total amount. It can be seen different factors PAHs of these parameters are also different. Come up with bituminous coal to generate more low-ring PAHs; anthracite generate more PAHs; impregnation method is ideal oxygen carrier load; proper combustion temperature is800℃, the heating rate and the degree of vacuum should choose the right parameters.Preliminary to explore is that the mechanism of polycyclic aromatic hydrocarbons (PAHs) in Coal chemical looping combustion and the mechanism of action of oxygen carrier and polycyclic aromatic hydrocarbons. Coal chemical looping combustion process, a first reaction is a process of coal gasification, mainly composition is CO, hydrocarbons and small molecules, then these components and the oxygen carrier make surface reaction, and the formation of ring in PAHs is growing, the first ring generated by the ring-closure reaction of butadiene1-3, then the ring-forming reaction is a condensation reaction of ring, so the gasification olefin substances are an important source of PAHs. And its formation is a surface reaction, the mixture of gas phase reactions are rare, depend on the body of carrying oxygen of load form and surface condition, have little relationship between the degrees of vacuum. And reaction is similar to the fast pyrolysis process, coal fracture trend of C-C key should be more obvious than C-H bond rupture, required to maintain at a high temperature with appropriate heating rate of the reaction. Body of carrying oxygen is not only oxidant and catalyst, but also can promote the degradation of polycyclic aromatic hydrocarbons and synthesis.