Abstract:

In order to meet the challenges of market demand and its changes in fluid catalytic cracking (FCC) technology, based on the understanding of the key steps of complex catalytic reaction and its regulation theory, a FCC process with directional regulation of bimolecular reaction depth and type and monomolecular reaction depth was developed by means of diameter-transformed fluidized bed catalytic reaction engineering, and the flexible switching between monomolecular and bimolecular reactions was realized, so that FCC technology had sufficient flexibility in production schemes. This paper introduces the key steps and regulation theory of complex catalytic reaction of petroleum hydrocarbons on catalysts. Based on the change of market demand for products, the reaction depth and direction of intermediate transition state are flexibly regulated, and efficient and flexible FCC technology is developed, and the connotation of catalytic reaction engineering technology of diameter-transformed fluidized bed is continuously enriched. Efficient and flexible FCC technology can switch gasoline production scheme to light olefins production scheme in a short time, and vice versa, providing technical support and coping strategies for the transformation and development of low-cost progressive refining.

Key words: complex catalytic reactions, diameter-transformed fluidized bed, fluid catalytic cracking, gasoline, light olefins

摘要：

为应对催化裂化（FCC）技术面临市场需求及其变化的挑战，基于复杂催化反应关键步骤及其调控理论的认识，借助变径流化床催化反应工程，开发出了定向调控双分子反应深度及类型、单分子反应深度的催化裂化工艺，并实现单分子和双分子反应灵活切换，从而使FCC技术具有足够的生产方案灵活性。本文介绍了石油烃在催化剂上发生复杂催化反应关键步骤及其调控理论认识，由此基于市场对产品需求变化，灵活调控中间体过渡态的反应深度与方向，开发出高效灵活催化裂化技术，并持续丰富变径流化床催化反应工程技术内涵。高效灵活的催化裂化技术可以在短时间内将汽油生产方案切换到低碳烯烃生产方案；反之亦然。本文可为低成本渐进式炼油转型发展提供技术支撑和应对策略。

关键词: 复杂催化反应, 变径流化床, 催化裂化, 汽油, 低碳烯烃