摘 要
催化裂化是石油炼制过程中重要的二次加工手段，其对柴油质量的优化具有显著意义。随着环保法规日益严格以及市场对高品质柴油需求的增加，提升催化裂化柴油的质量成为行业关注的重点。本研究旨在通过改进催化裂化工艺条件和催化剂选择，优化柴油产品的十六烷值、硫含量及芳烃组成等关键指标。研究采用实验与模拟相结合的方法，首先通过小型固定床反应装置进行催化剂筛选实验，评估不同催化剂对柴油组分的影响；其次利用Aspen Plus软件建立催化裂化过程模型，分析温度、压力、剂油比等操作参数对产品分布及柴油性质的作用规律。结果表明，新型分子筛基复合催化剂可显著降低柴油中的硫含量，并提高十六烷值，同时减少重芳烃生成量。此外，优化的操作条件（如适当提高反应温度和剂油比）能够进一步改善柴油品质。本研究的创新点在于结合实验数据与过程模拟技术，提出了一种系统化的柴油质量优化策略，为工业应用提供了理论支持和技术指导，具有重要的实践价值和经济意义。关键词：催化裂化；柴油质量优化；分子筛基复合催化剂；Aspen Plus模拟；操作条件优化
Abstract
Catalytic cracking is a crucial secondary processing method in petroleum refining, playing a significant role in optimizing diesel quality. With the increasing stringency of environmental regulations and the growing market demand for high-quality diesel, enhancing the quality of catalytic cracking diesel has become a focal point in the industry. This study aims to optimize key indicators of diesel products, such as cetane number, sulfur content, and aromatic composition, by improving the process conditions of catalytic cracking and selecting appropriate catalysts. A combination of experimental and simulation approaches was employed. Firstly, catalyst screening experiments were conducted using a small-scale fixed-bed reactor to evaluate the impact of different catalysts on diesel components. Secondly, a catalytic cracking process model was established using Aspen Plus software to analyze the effects of operational parameters, including temperature, pressure, and catalyst-to-oil ratio, on product distribution and diesel properties. The results indicate that the novel zeolite-based composite catalyst can significantly reduce sulfur content in diesel while increasing the cetane number and decreasing the production of heavy aromatics. Furthermore, optimized operating conditions, such as moderately increasing reaction temperature and catalyst-to-oil ratio, can further improve diesel quality. The innovation of this study lies in integrating experimental data with process simulation technology to propose a systematic strategy for diesel quality optimization, providing theoretical support and technical guidance for industrial applications, with important practical and economic implications..
Key Words：Catalytic Cracking；Diesel Quality Optimization；Zeolite-Based Composite Catalyst；Aspen Plus Simulation；Operating Conditions Optimization
目 录
摘 要 I
Abstract II
第1章 绪论 1
1.1 催化裂化与柴油质量优化背景 1
1.2 柴油质量优化研究的意义 1
1.3 国内外研究现状分析 2
1.4 本文研究方法概述 2
第2章 催化裂化过程机理分析 3
2.1 催化裂化反应基本原理 3
2.2 反应条件对柴油质量的影响 3
2.3 催化剂在裂化过程中的作用 4
2.4 裂化过程中副产物的生成机制 4
2.5 提高柴油收率的关键因素 5
第3章 柴油质量关键指标优化策略 6
3.1 柴油十六烷值提升途径 6
3.2 硫含量控制技术研究 6
3.3 柴油密度与闪点优化方法 7
3.4 环境友好型柴油生产路径 7
3.5 综合性能评价体系构建 8
第4章 工艺参数对柴油质量的影响研究 9
4.1 温度变化对柴油品质的作用 9
4.2 压力调节对裂化效果的影响 9
4.3 原料性质与柴油质量的关系 10
4.4 停留时间对产品分布的影响 10
4.5 参数优化模型的建立与验证 11
结 论 11
参考文献 13
致 谢 14
