ExxonMobil Installs Reactor at Baytown Refinery
The 2.6-million-pound reactor and vacuum tower for the Hydrocracker Unit were set in place as the Baytown reconfiguration moves into vertical construction.
Updated on Nov. 13, 2026 in Construction
ExxonMobil completed the heavy-haul and heavy-lift installation of a new reactor and vacuum tower for the Hydrocracker Unit at its Baytown Refinery. The reactor helps turn materials into products such as diesel and high-quality lubricant base stocks.
Why it matters
The century-old refinery was not originally designed for equipment of this size, so the project had to advance while the facility kept operating. The reconfiguration is expected to shift production toward higher-value products for Baytown and the wider Gulf Coast region.
The reactor weighs approximately 2.6 million pounds, roughly the combined weight of 85 school buses, and equipment passed existing structures with clearances as narrow as six inches. Peak construction in 2027 is projected to involve more than 1,000 contractors, though cost figures were not provided.
The players
ExxonMobil
ExxonMobil is a multinational oil and gas company headquartered in Texas that operates refineries and chemical plants across the United States and worldwide.
The details
Engineers used the JS-500 jacking system, typically employed in heavy civil construction to move large bridge components, to transport the reactor and vacuum tower through the operating refinery and lift them over existing pipe racks. A 3,000-ton LR-13000 crawler crane, the largest of its type available in North America, set the equipment in place after a 750-ton crane was used to assemble it.
Timeline
Recently completed: heavy-haul and heavy-lift campaign for the Hydrocracker Unit finished
2027: peak construction expected, with more than 1,000 contractors projected
2028: planned completion of the Baytown reconfiguration project
Market Landscape
The Baytown reconfiguration adds Group III base stock capabilities for high-performance engine oils and industrial lubricants, expanding the refinery's position in higher-value segments. The retrofit reflects the broader industry pattern of upgrading legacy Gulf Coast refining assets rather than building new facilities.
The reconfiguration is projected to shift output toward diesel fuels and lubricant base stocks, which could affect the supply of these products in the regional market. Local workers and contractors may see employment demand peak during the 2027 construction period.
The takeaway
Large industrial retrofits can be completed at operating facilities by adapting civil-engineering methods, allowing upgrades to proceed without shutting down production. Watching the 2027 peak and 2028 completion will show whether the reconfiguration delivers its planned shift to higher-value products.
What happens next
Peak construction is expected in 2027, when more than 1,000 contractors are projected to support the project, and completion is planned for 2028.
Further reading
Explore more construction coverage to see how large industrial projects like this one are built.
Source note: This article includes information reported by BaytownSun.
