Catalytic cracking of binary hydrocarbons of n-dodecane and iso-dodecane under supercritical conditions
2015
Wang, Ya | Xian, Xiaochao | Hou, Xu | Zhang, Xiangwen | Wang, Li | Liu, Guozhu
The mutual effect between different kinds of hydrocarbons would influence supercritical catalytic cracking behavior of jet fuel, and thus may affect the chemical heat sink. Highly branched iso-dodecane (mainly 2,2,4,6,6-pentamethylheptane, PMH) and n-dodecane were chosen as model hydrocarbons. The cracking of the binary system with different iso/n-dodecane ratios was conducted over HZSM-5 zeolite under supercritical conditions (673K, 4.0MPa). The results show that the cracking of n-dodecane in binary mixture is first inhibited but then accelerated with the increase of concentration of PMH, while the cracking of PMH was hardly effected. Limited by the inertness of PMH, total conversion of binary mixture is obviously lower than pure n-dodecane.
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