performance. Rejuvenated catalyst demonstrated similar activity and stability performances with respect to fresh catalyst for ULSD commer- cial applications. Substantial cost savings are achieved with the use of rejuvenated compared to loading fresh catalyst. The high through- put reactor system proved to be an excellent tool for a refiner to ensure the catalyst will exhibit the best performance for meeting their unit objectives prior to buying it. of Hydroprocessing Catalysts 2010, Ch 7, 191, Elsevier ISBN 978-0-444-53556-6. 2 Optimising refinery margins with Spent rejuvenated catalysts, PTQ, Q4 2021, 47-49. 3 I-T Trotus, J-C Adelbrecht, F Huber, N Pongboot, T Upienpong, PTQ , Q4 2019, 79-83. 4 Rejuvenated catalyst cuts changeout costs, PTQ , Q4 2019, 114-115. Ioan-Teodor Trotus is the Segment Lead for Hydroprocessing at hte GmbH in Heidelberg, Germany with over five years of experience in high throughput catalyst testing in both conventional refinery hydroprocessing References 1 Handbook applications as well as applications covering the conversion of renewable feedstocks. He holds a PhD in chemistry from the Max- Planck-Institute for Coal Research in Mülheim an der Ruhr, Germany. Email: Ioan-Teodor.Trotus@hte-company.de Jean-Claude Adelbrecht is Senior Business Development Manager at hte GmbH, Heidelberg, Germany and has been working in the field of high throughput experimentation for almost two decades in various positions. He holds a PhD in chemistry from Imperial College London. Email: Jean-Claude.Adelbrecht@hte-company.de Michael Martinez is the Technical Manager with Evonik, providing support to refineries and chemical plants in catalyst and adsorbent applications spanning light naphtha through vacuum gasoil. He has more than 23 years of experience in catalyst manufacturing and commercial applications. He holds a degree in chemical engineering from Texas A&M in College Station. Email: michael.martinez@evonik.com Guillaume Vincent is the Business Segment Manager for hydroprocessing solutions at Evonik. He has over 14 years of experience in hydroprocessing services and solutions for refining and petrochemical applications. He holds a PhD in chemical engineering from ENSIC, Nancy, France. Email: guillaume.vincent@evonik.com
1050
1000
950
900
850
800
30% Excel NiMo / 70% Fresh NiMo 70% Fresh NiMo / 30% Excel CoMo 70% Excel NiMo / 30% Excel CoMo
Fresh NiMo Excel NiMo
750
36
38 40 42 44 46 48
50
52 54
56
TOS (day)
Figure 8 Hydrogen consumption for all catalyst configurations
Feed and operating conditions of the European refiner
Parameter
ULSDmode
Heating oil mode
Feed sulphur, wt% Feed nitrogen, ppmw
0.29
0.44
250-350
400-500
Density, kg/m³ D-86 (FBP), °C
850 360
867 381
Operating pressure, barg
71
71
LHSV, h -1
3.1
2.6
Table 4
420
410
400
390
380
370
360
350
340
330
320
Excel® rejuvenated NiMo Alternative fresh catalyst
310
300
0
10
20
30
40 50 60 70 80 90 100
110
Time-on-stream (days)
Figure 9 Comparison of rejuvenation with conventional fresh catalyst
PTQQ 2 2022 55
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