Coupling of Mass Transfer and Reaction in Coking of Thin Films of an Athabasca Vacuum Residue
Coupling of Mass Transfer and Reaction in Coking of Thin Films of an Athabasca Vacuum Residue
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DOI：
10.1021/ie0009379
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发表时间：
2001-06
影响因子：
4.2
通讯作者：
M. Gray;T. Le;W. McCaffrey;F. Berruti;S. Soundararajan;E. Chan;I. Huq;Clint Thorne
中科院分区：
文献类型：
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作者：
M. Gray;T. Le;W. McCaffrey;F. Berruti;S. Soundararajan;E. Chan;I. Huq;Clint Thorne
研究了阿萨巴斯卡减压渣油薄膜热裂解反应与传质的耦合过程。将真空残余物的薄膜涂覆在不锈钢管的内部上，然后使用感应加热加热至530 °C。用氮气将蒸气产物吹出反应区，并使液相中的反应进行至完成。测定了初始膜厚为10 ~ 80 μm时的焦炭产率、总液体产物和气体产率。采用高温模拟蒸馏和微碳渣浓缩对液体样品的产品质量进行了表征。焦炭产率随着膜厚度的减小而降低，而馏出物产物（<524 °C沸点）的产率增加。随着膜厚度的减小，传质模式从厚膜中的鼓泡转变为通过停滞的薄膜的扩散。这些结果与裂解产物的捕获减少一致。
The coupling of reaction and mass transfer was investigated for the thermal cracking of thin films of an Athabasca vacuum residue. Thin films of the vacuum residue were coated on the interior of a stainless steel tube and then heated to 530 °C using induction heating. Vapor products were swept out of the reaction zone with nitrogen, and reactions in the liquid phase were allowed to proceed to completion. Coke yield, total liquid product, and gas make were determined for initial film thicknesses ranging from 10 to 80 μm. Product qualities of the liquid samples were characterized by high-temperature simulated distillation and microcarbon residue concentration. The coke yield decreased as the film thickness was reduced, while the yield of distillate products (<524 °C boiling point) increased. As the film thickness was reduced, the mode of mass transport shifted from bubbling in thick films to diffusion through a stagnant thin film. These results were consistent with a decrease in the trapping of cracked prod...