《Table 1 Properties of heavy oil feedstock》

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《Research on Catalytic Cracking Performance Improvement of Waste FCC Catalyst by Magnesium Modification》

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The heavy oil catalytic cracking tests of the samples were performed at 530°C on a Kayser R+Multi advanced cracking evaluation unit（ACE）operating with a catalyst/oil weight ratio of 5.The gaseous and liquid effluents were determined by gas chromatography（HP6890）.The paraffins（P），olefins（O），naphthenes（N），and aromatics（A）contents（PONA analysis）of cracked gasoline were analyzed by a gas chromatograph（Varian CP-3380）.The amount of coke deposited on the catalyst was assessed by burning the sample in a carbon analyzer（DF 190）.The properties of the heavy oil are listed in Table 1.