---
title: US Refinery Gas Oil Hydrotreater Case Study
description: Learn how a non-Shell US refinery was combined Shell Filter/High-Dispersion Trays and reactor internals to increase GOHT cycle length by 300%
---

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CASE STUDY

# Increasing Gas Oil Hydrotreater Cycle Length by 300% with Shell Filter Trays and Reactor Internals

![US Refinery Case Study Filter Trays Impact on Gas Oil Hydrotreater Cycle Length](https://catalysts.shell.com/hs-fs/hubfs/US%20Refinery%20Case%20Study%20Filter%20Trays%20Impact%20on%20Gas%20Oil%20Hydrotreater%20Cycle%20Length.png?width=180&name=US%20Refinery%20Case%20Study%20Filter%20Trays%20Impact%20on%20Gas%20Oil%20Hydrotreater%20Cycle%20Length.png)A non-Shell US refinery’s cycle length was consistently limited to between 9 and 12 months. This was a result of a high-pressure drop across reactor beds.

Attempts were made to remedy the performance issue but nothing was making a substantial impact.

#### **The solution?** Combined Shell Filter/High-Dispersion Trays.

When the reactors' hardware was upgraded with Shell Filter/High-Dispersion Trays, **cycle length for the gas oil hydrotreater (GOHT) was increased by 300%.**

Contrast this with the marginal 16% improvement from the initial attempts and it's clear to see the value of state-of-the-art hardware.

##### Get the US refinery case study to learn more.

#### **Access the case study**