This paper presents applied research study on regenerated CoMo catalyst for various possible re-use for ULSD production. It is focused on the pilot plant testing of regenerated CoMo catalyst for ULSD production by processing LVGO & HGO blends at various ratios for re-use in another hydrotreater unit of refinery. Regenerated catalyst which was unloaded from commercial hydrotreater after its turnaround was evaluated using four different blends of LVGO & HGO.

Experimental process conditions viz. LHSV 0.5 h⁻¹, pressure 57 bar(g) and H₂/Oil ratio 300 Nm³/m³, were maintained while feed/blend ratio & temperature were variable parameters. Based on the pilot study results we anticipated processing of LVGO with HGO blended feed requires 5 °C–10 °C higher activity comparing with full HGO feed. Analysis of hydrogen content of feed & product and estimation of the catalyst life cycle has been discussed. Details of hydro processing pilot plant design; operation and data analysis are provided wherein which operating conditions were tuned to commercial unit. This experiment shows that by contriving computational methods and analysis techniques, it has become possible to calculate hydrogen content & catalyst deactivation rate using pilot plant test results to predict commercial unit performance. These were effective techniques used to validate the regenerated CoMo catalyst at pilot scale testing for optimized re-use in commercial refinery.

本文介绍了再生CoMo催化剂在超低硫柴油生产中各种可能的再利用方面的应用研究。它专注于通过以各种比例处理LVGO和HGO混合物以在另一座炼油厂的加氢处理机中重复使用来处理用于ULSD的再生CoMo催化剂的中试工厂测试。使用LVGO和HGO的四种不同混合物评估了从工业加氢处理机中卸下后要卸载的再生催化剂。

实验过程条件即。LHSV 0.5 h ^-1，压力57 bar（g）和H ₂ /油比300 Nm ³ / m ³保持进料/混合比和温度为可变参数。根据初步研究结果，我们预计与全HGO饲料相比，用HGO混合饲料加工LVGO的活性需要高5°C–10°C。讨论了进料和产品中氢含量的分析以及催化剂寿命周期的估算。加氢处理中试设备设计的详细信息；提供了操作和数据分析，其中哪些操作条件已调整到商业单位。该实验表明，通过设计计算方法和分析技术，利用中试工厂的测试结果来预测商业单元的性能，可以计算出氢含量和催化剂的失活速率。