Relationship between Chemical Constituent of Residual Oils and their Reactivity in Steam Reforming with Fluidized Bed of Dolomite
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概要
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Steam reforming of eight different residual oils was studied using a fluidized bed of dolomite at 900°C and atmospheric pressure. To elucidate the relationship between the chemical constituent of residual oils and their reactivity in steam reforming, each residual oil was separated into four costituents (saturates, aromatics, resins and asphaltenes) by solvent extractions using anhydrous alumina column. Furthermore, a structural investigation was done on each constituent by way of proton magnetic resonance spectroscopy. The chemical structures were expressed in terms of number of carbon atoms with different nature and their distribution which were derived from proton distribution, elemental analyses and molecular weight data. In spite of a wide variety in the structure of feed oils, the gas yield increased proportionally as the content of saturates plus aromatics in the feed oils increased, showing that heavy fractions, resins and asphaltenes were hardly converted to gaseous products. It was shown by additional experiments using a flow system that the reactivity with steam of carbon deposited from saturates and aromatics was higher than that of deposited carbon: from resins and asphaltenes. Moreover, the reactivity of deposited carbon from a residual oil was found to be of the same magnitude with that of the carbon deposited from its saturate and aromatic fractions. It was concluded that steam reforming of residual oils mainly proceeded via highly reactive carbon deposited from their saturates and aromatics as an intermediate.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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