Abstract The catalytic and thermal cracking of three types of whole crude oils, having API gravity at 34° (AL), 39° (AXL) and 51° (ASL), were investigated via a fixed-bed micro-activity test (MAT) unit at high temperature between 600 and 650 °C. Equilibrium FCC catalyst (E-Cat)/ZSM-5 additive was used for catalytic cracking tests at 30 s and catalyst/oil (C/O) ratio of 2.0–6.0. For both thermal and catalytic cracking of all crude oils, the increase in reaction temperature resulted in higher conversion and enhanced yields of C2-C4 light olefins, LPG, coke, and dry gas at the expense of naphtha, heavy cycle oil (HCO), and light cycle oil (LCO). In thermal cracking, the yields of C2-C4 olefins at 650 °C were as follows: AL (22.8 wt.%) > AXL (19.0 wt.%) > ASL (18.8 wt.%) associated with naphtha yields of 34.4, 38.1 and 48.0 wt.%, respectively. Compared with thermal, catalytic cracking over E-Cat/ZSM-5 enhanced conversion, doubled the yields of light olefins and showed an increase in aromatics content of naphtha fraction. Contrary to thermal cracking, the yields of C2-C4 olefins in catalytic cracking were as follows: ASL (42.9 wt.%) > AXL (41 wt.%) > AL (39.1 wt.%) associated with naphtha yields of 31.7, 27.5, and 23.0 wt.%, respectively.

中文翻译：

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高强度全原油的热裂化和催化裂化

摘要 通过固定床微活性试验 (MAT) 研究了 API 比重为 34° (AL)、39° (AXL) 和 51° (ASL) 的三种类型全原油的催化裂解和热裂解。装置在 600 至 650 °C 之间的高温下。平衡 FCC 催化剂 (E-Cat)/ZSM-5 添加剂用于催化裂化试验，时间为 30 秒，催化剂/油 (C/O) 比为 2.0-6.0。对于所有原油的热裂化和催化裂化，反应温度的升高导致 C2-C4 轻烯烃、LPG、焦炭和干气的更高转化率和产率提高，但会消耗石脑油、重循环油 (HCO)、和轻循环油 (LCO)。在热裂化中，C2-C4 烯烃在 650 °C 的产率如下：AL (22.8 wt.%) > AXL (19.0 wt.%) > ASL (18.8 wt.%) 与 34.4、38.1 的石脑油产率相关和 48.0 重量％，分别。与热裂解相比，E-Cat/ZSM-5 上的催化裂化提高了转化率，使轻质烯烃的产率翻了一番，并增加了石脑油馏分的芳烃含量。与热裂化相反，催化裂化中 C2-C4 烯烃的产率如下：ASL (42.9 wt.%) > AXL (41 wt.%) > AL (39.1 wt.%) 与 31.7、27.5 的石脑油产率相关和 23.0 重量％，分别。