Kerosene feed, pyrolysis

Carbon formation is also different for diesel and gasoline. The long chain hydrocarbons present in diesel or kerosene fuel are more difficult to reform than the shorter chain hydrocarbons present in gasoline, while aromatics in gasoline hinder the overall reaction rate. An example is found in the results of Ming et who showed that SR of n-Ci required a higher steam/ carbon ratio to avoid coke formation than i-Cg. The cetane number of the feed had little effect on carbon formation. Carbon formation can often be attributed to fuel pyrolysis that takes place when the diesel fuel is vaporized. This is considerably decreased when the steam content in feed increases. 

The active-metal combinations such as Co Ni, Co-Mo and Ni-Mo supported on AC exhibited a high activity during upgrading of the feed obtained from scrap tires by pyrolysis. The experiments were conducted at 573, 623 and 673 K at 7 MPa of H2. The yields of naphtha and kerosene fractions, as well as the rate of HDS were the parameters used to estimate the activity. In this regard, the NiMo/AC catalyst was the most active, although the activity difference among the three catalysts was not so large. 

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