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Effect of introducing oxygen into ethylene tar pitches on their carbonaceous products
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Effect of introducing oxygen into ethylene tar pitches on their carbonaceous products
Ethylene tar is a prospective precursor for preparing carbonaceous materials,which is regarded as a representative soft carbon material after carbonization.However,the introduction of oxygen can influ-ence the morphology of the final carbonaceous materials.For the introduction of oxygen,dealkylation and dehydrogenation will be promoted and the molecules can be linked more effectively.For the sub-sequent carbonization,the biphenyl structures caused by the deoxygenation via the elimination of CO2,as well as the reserved aromatic ether bonds,can facilitate the strong cross-linking,which will restrain the movement of the carbon layers and the formation of the graphitic structures.After the graphitization treatment at 2800℃,the oxidized pitch can lead to short-range ordered and long-range unordered structures,while the sample without oxidation can result in long-range ordered graphitic structures.It can be proved that a simple oxidation-carbonization treatment can transform ethylene tar into hard carbon structures.
FuelOxidationEthylene tar pitchCarbonizationHard carbonChemical processes
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis,Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education),Shanghai Key Laboratory of Multiphase Materials Chemical Engineering,State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China
Fuel Oxidation Ethylene tar pitch Carbonization Hard carbon Chemical processes
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