High-dispersion trays
Shell HD trays enable almost 100% wetting of the catalyst from the top of the bed, unlike bubble cap-type and other distribution trays which typically only wet a fraction of the top of the bed.
Meet stringent product specifications with high-dispersion trays
Conventional distribution trays, even advanced bubble-cap designs, present challenges managing low uniformity of vapour鈥搇iquid distribution and undesirable thermal maldistribution.
Shell HD trays outperform existing dispersion tray technology to enable greatly improved wetting of the catalyst bed and vapour-liquid and thermal distribution.
Even in retrofit applications, Shell HD trays offer performance benefits
The substantially high-performance profile of Shell HD trays makes them essential components in any hydroprocessing reactor, especially when paired with other Shell reactor internals such as Shell ultra-flat quench (UFQ) interbed internals.
Lower start-of-run temperatures
Decrease catalyst deactivation
Lower end-of-run weighted average bed temperatures
Speed up catalyst change-outs
Increase safety by providing a large manway for easy egress
Eliminate the need for hot work and power tools
Discover how Shell technologies can help you enhance performance
Address fouling using this three-tiered approach
Learn how you can identify the root cause of fouling and apply solutions to help you mitigate negative impacts.
A non-Shell US refinery experienced a 300% increase in cycle length for their GOHT
Discover the impact of Shell filter trays and how Shell鈥檚 top-bed grading system can significantly reduce pressure drop issues and increase cycle length.
How one refinery increased days on-stream by 300%
Learn how this refinery was able to create more time-on-stream, consistent production, higher throughput, and increased profitability.
Built on more than 25 years of experience
Shell HD trays have helped clients achieve up to 30% higher utilisation of the catalyst for hydrotreating reactors and up to 50% more for hydrocracking reactors.
Shell HD trays have benefited from:
鈼� Extensive experiments in our pressurised testing facilities
鈼� Advanced computer simulations
鈼� More than 25 years of experience in customer and Shell-affiliated refineries
Explore the Shell reactor internals portfolio
Discover how our reactor internals portfolio of technologies can help to uniformly distribute liquid and gas, minimise thermal maldistribution, and maximise catalyst volume and utilisation to enable improved performance.
In addition to Shell HD trays, the Shell reactor internals portfolio also a range of other products, including Shell UFQ interbed internals and Shell filter trays.
Learn more about Shell HD Trays
Fuel trends demand improved hydroprocessing methods. Shell Catalysts & Technologies equips refiners to meet these market trends using Shell reactor internals. High-dispersion trays 鈥� often shortened to HD trays have the potential to vastly improve refiners鈥� cycle lengths through reduced catalyst deactivation, lower reactor inlet temperatures and improved thermal distribution. Documented case studies have demonstrated higher throughput capacity and the ability to process heavier feeds.
Owing to their excellent vapour鈥搇iquid and thermal distribution, Shell HD trays function equally well as top distribution and interbed distributor trays to aid full catalyst utilisation throughout the reactor. As an interbed distributor tray, unlike existing designs that require a deep layer of inert distributive packing, Shell HD trays enable the reactor beds to be filled with more active catalyst.
In one case, Shell HD trays offered up to 30% higher utilisation of the catalyst for hydrotreating reactors and up to 50% more for hydrocracking reactors.