Abstract
Oil sludge (OS) pyrolysis was conducted with a tube furnace reactor. Production distributions and compositions were investigated under different conditions of pyrolysis temperature, heating mode, and atmosphere (N2/CO2). Little change was detected with the product yields of char, oil, and gas when the final temperature exceeded 600 °C. Compared with slow pyrolysis, oil and char yields decreased and gas yield increased in fast pyrolysis. CO2 could promote OS pyrolysis, resulting in a reduction of char yield. SEM images showed that the surface of OS was smooth with a dense texture while the surface of OS char was rough with a well-developed pore structure that formed after pyrolysis. Simulated distillation results showed that light fractions from OS pyrolysis were more than 30% higher than those of oil from OS extraction. With the increase of pyrolysis temperature, light fractions (gasoline, diesel, and jet fuel) in pyrolysis oil decreased. During fast pyrolysis, the heavy fractions produced can be cracked ...
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