We specialize in the design, modification, debottlenecking, and scale up of petroleum refineries, renewables technology, and chemical processing facilities. Clients trust Ascent's holistic review of their processing plant with the assurance of a successful completion. Ascent has a well established history of expertise in refinery retrofits and is also well poised to help new processes make the transition from the laboratory to commercialization.
Choosing an Engineering Firm that understands your mission and has a similar vision will ensure the success of your project. Established over 24 years ago and with two dozen of the best chemical engineers in the business boasting hundreds of years of combined experience, we are your best choice for up-front process identification, definition, and design.
My goal creating Ascent in 1997 was to create the preeminent process design firm serving the refining and chemical industries filling a niche not met by competing firms. Our motto is simple, "Do what is best for the client".
Choosing an Engineering Firm that understands your mission and has a similar vision will ensure the success of your project. Established over 24 years ago and with two dozen of the best chemical engineers in the business boasting hundreds of years of combined experience, we are your best choice for up-front process identification, definition, and design.
My goal creating Ascent in 1997 was to create the preeminent process design firm serving the refining and chemical industries filling a niche not met by competing firms. Our motto is simple, "Do what is best for the client".
Services
In 2007 when renewable diesel first began to be considered as an alternative fuel, Ascent assisted in the development, preliminary process design, and cost estimation for a new, proprietary renewable diesel process based on a newly developed catalyst.
The work included.
A client approached Ascent with a project to add a diesel recovery section to the top of their crude unit's vacuum tower.
The client's goal was to maximize distillate recovery by recovering diesel being left in their vacuum gas oil.
The work included.
A client approached Ascent with a project to add a diesel recovery section to the top of their crude unit's vacuum tower.
The client's goal was to maximize distillate recovery by recovering diesel being left in their vacuum gas oil.
In 2007 when renewable diesel first began to be considered as an alternative fuel, Ascent assisted in the development, preliminary process design, and cost estimation for a new, proprietary renewable diesel process based on a newly developed catalyst.
The work included conceptual development of the new process.
Ascent also reviewed feedstock alternatives, the required feed preparation for each, along with the impacts upon the unit design.
Since then, the catalyst developer has developed the catalyst and had several patents granted.
The work included conceptual development of the new process.
Ascent also reviewed feedstock alternatives, the required feed preparation for each, along with the impacts upon the unit design.
Since then, the catalyst developer has developed the catalyst and had several patents granted.
A client approached Ascent with a project to add a diesel recovery section to the top of their crude unit's vacuum tower.
The client's goal was to maximize distillate recovery by recovering diesel being left in their vacuum gas oil.
The gas oil was routed to the FCCU Feed Hydrotreater (Cat Feed Hydrotreater, CFH) then to the FCCU; thus recovering diesel would shift refinery yield from gasoline to diesel.
The initial project objective was to recover diesel at the vacuum unit and route that additional diesel to the diesel hydrotreaters.
The client's goal was to maximize distillate recovery by recovering diesel being left in their vacuum gas oil.
The gas oil was routed to the FCCU Feed Hydrotreater (Cat Feed Hydrotreater, CFH) then to the FCCU; thus recovering diesel would shift refinery yield from gasoline to diesel.
The initial project objective was to recover diesel at the vacuum unit and route that additional diesel to the diesel hydrotreaters.
A client needed to meet the Tier 3 10 ppm sulfur in gasoline specification.
They recognized that high sulfur levels in the final hydrotreated CGHT product was the main obstacle to achieving the Tier 3 specification.
Prior engineering studies had focused on the high sulfur CGHT product and recommended expensive new reactors to mitigate.
The sulfur content in the CGHT feed (sour naphtha from the FCCU) was less than design, but the product sulfur content was higher than design.
This was at least partly due to operating in low severity Octane Preservation mode, which results in less octane loss than in high severity mode.
They recognized that high sulfur levels in the final hydrotreated CGHT product was the main obstacle to achieving the Tier 3 specification.
Prior engineering studies had focused on the high sulfur CGHT product and recommended expensive new reactors to mitigate.
The sulfur content in the CGHT feed (sour naphtha from the FCCU) was less than design, but the product sulfur content was higher than design.
This was at least partly due to operating in low severity Octane Preservation mode, which results in less octane loss than in high severity mode.
A client needed to meet the Tier 3 10 ppm sulfur in gasoline specification.
Their initial path was to add a polishing reactor to their FCCU gasoline and a Merox to treat their n-butane.
This project was expected to cost upwards of $100MM to implement.
Ascent's initial scope was just to write a butane Merox specification, but Ascent convinced the project team and refinery organization that the better approach was to instead hydrotreat the higher sulfur Light Straight Run product.
Ascent completed the butane Merox specification and worked with the vendors.
Their initial path was to add a polishing reactor to their FCCU gasoline and a Merox to treat their n-butane.
This project was expected to cost upwards of $100MM to implement.
Ascent's initial scope was just to write a butane Merox specification, but Ascent convinced the project team and refinery organization that the better approach was to instead hydrotreat the higher sulfur Light Straight Run product.
Ascent completed the butane Merox specification and worked with the vendors.
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