Overview of Primus STG+® Technology

Primus STG+® Gas-to-Methanol System

Primus’ gas-to-methanol System produces IMPCA grade methanol at small, medium, or large scales in any location where there is a feed gas source. The simple, economical process accommodates a range of feedstock types, including associated gas, wet or dry natural gas, and ethane. Due to its integrated design, the system is cost-effective at scales as small as 160 metric tons per day of methanol, providing owners with an economical mechanism to capitalize on local natural gas resources while meeting regional methanol demand.

How it works

The Primus Gas-to-Methanol STG+® process is comprised of three steps:

  • 1.Steam Methane Reforming Natural or associated gas reacts with steam at a high temperature and pressure to produce syngas.
  • 2.Syngas to Methanol Reaction Syngas reacts in a catalytic fixed bed reactor that converts the syngas to methanol.
  • 3.Distillation/Separation The water/methanol mixture is separated from other gases, and then fed to a distillation system that is designed to meet the user’s methanol purity requirements. On-spec methanol is collected from the top of the distillation system, water is reused to make steam for the reformer and off-gas is recycled as feed or fuel to the reformer.

Primus STG+® Gas-to-Gasoline System

With STG+® technology at its core, Primus’ Gas-to-Gasoline system produces high-quality gasoline or diluent directly from a wide range of hydrocarbon gas types. Unlike large stick-built units, our modular gasoline units are uniquely designed to be cost-effective at scales as small as 500 barrels per day (bpd). Thanks to its flexible feed gas requirements, unique design and high quality fuel product, Primus’ gasoline system is unmatched in the industry for simplicity and profitability.

How it works

The Primus Gas-to-Gasoline STG+® system takes place in a continuous gas-phase closed loop, with no intermediate condensation steps.
The Primus Gas-to-Gasoline STG+® process is comprised of three steps:

  • Steam Methane Reforming Natural gas or other hydrocarbon gas reacts with steam at a high temperature and pressure to produce syngas (H2,CO and CO2 ).
  • Syngas-to-Gasoline A series of catalytic fixed-bed reactors convert the syngas into gasoline and water via methanol and dimethyl ether intermediates.
  • Liquid/Gas Separation The products are cooled and condensed. The gasoline product is sent to storage; the water is reused to make steam for the reformer; and the unconverted gas is recycled, with a portion being used to fuel the reformer.