Achieving direct catalytic cracking of crude oil to produce low-cost petrochemicals is a milestone technology for the transformation of refinery from “fuel type” to “chemical engineering type”. Herein, we first established the crude oil catalytic cracking process and identified the key process parameters affecting ethylene and propylene yields. Meanwhile, the crude oil direct steam cracking process was selected as a comparative process for the process economic, social and environmental performance by an improved life cycle society-environment assessment method. The improvement direction, suitable preheating temperature and higher cracking temperature, are given from the aspect of process though systematic integration and intensification. Results show the conversion rate of the catalytic cracking process is 86.10%, while the steam cracking process is only 76.71%. Furthermore, the utilization efficiency of carbon and hydrogen in the catalytic cracking process is 1.29 and 1.47 times higher than the steam cracking process, respectively. As for the society-economic performance, the catalytic cracking process provides up to 65% and 11% increase in net present value and total output value. As for the environmental performance, the catalytic cracking process consumes approximately 4% less non-renewable energy and has 31% less waste water generation. The results in this study harbour tremendous guiding significance to the design of crude oil directly efficient conversion to petrochemicals.

实现原油的直接催化裂化以生产低成本的石油化工产品是将炼油厂从“燃料型”转变为“化学工程型”的一项里程碑式技术。本文中，我们首先建立了原油催化裂化工艺，并确定了影响乙烯和丙烯收率的关键工艺参数。同时，通过改进的生命周期社会-环境评估方法，选择原油直接蒸汽裂化工艺作为工艺经济，社会和环境绩效的比较工艺。通过系统的整合和强化，从工艺的角度给出了改进的方向，合适的预热温度和更高的裂解温度。结果表明，催化裂化反应的转化率为86.10％，而蒸汽裂解过程仅占76.71％。此外，催化裂化过程中碳和氢的利用效率分别是蒸汽裂化过程中的1.29和1.47倍。至于社会经济绩效，催化裂化过程可将净现值和总产值分别提高65％和11％。至于环境性能，催化裂化过程消耗的不可再生能源减少约4％，废水产生减少31％。这项研究的结果对直接有效地转化为石化产品的原油的设计具有巨大的指导意义。分别。至于社会经济绩效，催化裂化过程可将净现值和总产值分别提高65％和11％。至于环境性能，催化裂化过程消耗的不可再生能源减少约4％，废水产生减少31％。这项研究的结果对直接有效地转化为石化产品的原油的设计具有巨大的指导意义。分别。至于社会经济绩效，催化裂化过程可将净现值和总产值分别提高65％和11％。至于环境性能，催化裂化过程消耗的不可再生能源减少约4％，废水产生减少31％。这项研究的结果对直接有效地转化为石化产品的原油的设计具有巨大的指导意义。