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日本エネルギー学会誌 Vol. 91 (2012), No. 4

ISIJ International
belloff
オンライン版ISSN: 1882-6121
冊子版ISSN: 0916-8753
発行機関: The Japan Institute of Energy

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キーワードランキング

21 Nov. (Last 30 Days)

日本エネルギー学会誌 Vol. 91 (2012), No. 4

水およびトルエン存在下におけるオイルサンドビチューメン熱分解反応

大里 享平, 加藤 慎之助, 相田 卓, 渡邉 賢, Richard Lee SMITH, Jr, 猪股 宏

pp. 303-310

DOI:

10.3775/jie.91.303

抄録

Phase observation of bitumen in toluene, or water-toluene mixture was conducted during heating up to 380 °C or 400 °C by a view cell. In all the cases, gas (water-rich) and liquid (oil-rich) phases were observed at the final temperature. Bitumen pyrolysis in toluene or water-toluene mixture was also performed at 430 °C. For comparison, bitumen pyrolysis in the absence of solvent (so-called neat pyrolysis) was also conducted. The coke yield at a reaction time of 30 min in toluene was lower than that of neat pyrolysis, while that in water-toluene mixture was the highest among all the reaction atmospheres (neat pyrolysis, in toluene, and in water-toluene mixture). At 60 min, the coke formation was suppressed in the presence of solvents (toluene and water-toluene mixtures). From these kinetic data, the addition of water even in the presence of toluene enhanced the rate of coke formation. On the other hand, due to the extraction of light maltene (that formed oil-rich liquid phase in the neat pyrolysis) by solvents, the amount of hydrocarbons in the oil-rich liquid phase decreased and the final coke formation was lower in the presence of solvents than in the absence of them. A phase separation kinetic model was applied to the experimental results in order to evaluate rate constants of maltene degradation (kM) and coke formation (kC). The addition of toluene decreased kM. This means that maltene in the oil-rich liquid phase was extracted by toluene and its concentration was lower compared with neat pyrolysis. In toluene, kC was higher than that in neat pyrolysis and it is the same reason as the decrease of kM, that is, the extraction concentrated asphaltene in oil-rich liquid phase and the rate of coke formation was enhanced. The kM in water-toluene mixture was higher than that in toluene alone. In water-toluene mixture, some part of lighter maltene probably remains in oil-rich liquid phase because of high pressure of water. This can be explained the reason of higher value of kM. The addition of water-toluene mixture increased kC more than that in toluene. The reason is difficult to explain at this moment and further research is required.

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水およびトルエン存在下におけるオイルサンドビチューメン熱分解反応

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転炉ダストを用いた廃プラスチックの液体燃料化におけるPETの影響と触媒効果

角田 雄亮, 菅野 元行, 平野 勝巳

pp. 311-316

DOI:

10.3775/jie.91.311

抄録

Dechlorination of PVC is indispensable for liquefaction of chlorine-containing waste plastics (CCWP). Therefore, the following process was investigated: converter dust (CD) and the heavy oil bottom component of coal tar (HOB) were mixed with CCWP and melted at 250 °C to form iron chloride. A hot water process was performed at 250 °C to extract the iron chloride. Afterwards, the hydrocracking of the mixture of plastics and HOB was performed at 400-450 °C to generate the light oil. However, the amount of polyethylene terephthalate (PET) in waste plastics is increasing every year. Therefore, it is necessary to clarify additive effect of CD in the presence of PET. Moreover, a portion of CD added in excess during the melt process is expected to act as a catalyst for the hydrocracking. The results indicated that the formation of the iron chloride and the generation of chlorinated hydrocarbons occurred competing in the presence of PET. However, the hot water process was performed after the melt process so that the chlorine contained in the chlorinated hydrocarbons and the iron chloride can be removed. In addition, it was confirmed that CD exhibited catalytic activity for the hydrocracking of the mixture of plastics and HOB.

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転炉ダストを用いた廃プラスチックの液体燃料化におけるPETの影響と触媒効果

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