Investigation of fouling and pressure drop profiles in packed-bed catalytic reactor during hydrotreating of bitumen-derived gas oils

沥青衍生瓦斯油加氢处理过程中填充床催化反应器的结垢和压降曲线研究

• 批准号: 566954-2021
• 负责人: Dalai, AjayAK
• 金额: $ 9.47万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746721
• 关键词: Investigation; fouling; pressure; drop; profiles

A prevalent problem associated with the seamless operation of hydrotreating catalytic reactors in the refinery is the issues of fouling and pressure drop growth. These limit the scheduled run lengths of catalytic reactor operation and in severe cases warrant premature shutdowns. The occurrence of submicron metal particles in bitumen-derived gas oils at extremely low concentrations (<100 ppm), can accumulate over extended feed processing times and culminate in significant pressure drop and consequently premature shutdown. Similarly, conjugated olefins can also lead to catalyst deactivation, and fouling in hydrotreater reactors. To gain insight into fouling and the pressure drop profiles associated with hydrotreating of bitumen-derived oils, and to develop appropriate mitigation strategies, a systematic investigation on the fouling mechanism of various foulants present in bitumen-derived gas oils is required. In this proposed work, catalyst fouling, and pressure drop issues due to foulants such as metal fines and conjugated olefins will be studied under industrial conditions in collaboration with Syncrude Canada Ltd. A packed bed hydrotreating reactor that simulates an industrial hydrotreater and actual industrial feeds will be used in studying the issues of foulants. The effects of foulants in the heavy and light gas oils on hydrodesulfurisation and hydrodenitrogenation are also examined. Besides, strategies to minimize foulants deposition on the catalyst bed and reactor body will be investigated by altering the surface acidity of a hydrotreating catalyst, the catalyst pellet morphology, and reactor operating conditions. Additionally, interactive effects of catalyst acidity and process conditions will be investigated along with mathematical modeling of foulants deposition. The proposed outcomes of this project will offer solutions to our industrial partner to mitigate localized zonal fouling, and thus to achieve the desired operating cycle between catalyst regenerations in their Mildred Lake upgrader that produces 350,000 bbl/day of sweet crude oil (SCO) from bitumen oil. In addition, this research will enable other Canadian oil companies to improve the profit margin of SCO production while publishing the project findings.

与炼油厂中水力处理催化反应器无缝操作相关的普遍问题是结垢和压降生长的问题。这些限制了催化反应器操作的预定运行长度，并在严重的情况下保证过早关闭。在极低浓度（<100 ppm）的沥青衍生的气体油中，亚微米金属颗粒的发生可以在扩展的进料过程中积累，并在大量压降中达到高潮，从而导致过早关闭。同样，共轭烯烃也会导致催化剂失活，并在水力发电反应堆中污染。为了深入了解污垢和与沥青衍生油的水力处理相关的压降曲线，并制定适当的缓解策略，需要对沥青衍生气体油中各种污染物的结垢机制进行系统的研究。在这项提议的工作中，将在工业条件下与Syncrude Canada Ltds合作研究，催化剂结垢以及诸如金属罚款和共轭烯烃等污垢引起的压力降低问题。一种模拟工业水力发电剂和实际工业饲料的包装式水力发电反应堆，将用于研究粉料问题的问题。还检查了污水油中的污垢对氢化硫化和氢化硝化作用的影响。此外，将通过改变水力发电催化剂的表面酸度，催化剂颗粒的形态和反应堆工作条件来研究最小化污垢沉积和反应堆体内污垢沉积的策略。另外，将研究催化剂酸度和过程条件的交互作用以及污垢沉积的数学建模。该项目的拟议成果将为我们的工业合作伙伴提供解决方案，以减轻局部区域污染，从而实现其Mildred Lake升级器中催化剂再生之间所需的工作周期，从而产生350,000 bbl的甜味原油（SCO），从沥青油中产生350,000 bbl。此外，这项研究将使其他加拿大石油公司能够在发布项目发现时提高SCO生产的利润率。