Gas-to-Gasoline STG+®

With STG+® technology at its core, Primus’ Gas-to-Gasoline system is simple to operate and is not labor intensive. It 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) and the catalysts used have a lifetime >5 years.


Essential requirements for a modular plant like this are:

  • At least 6mmcf/day of natural gas supply (C1-C5) less than or equal to $2.50/mmbtu (in USA/Canada)
  • Water supply of 5gpm; almost self-sufficient (unlike methanol process)
  • 3MW of power capacity
  • Ability to operate 24/7/365 as operating capacity is >95%

How it works

The Primus Gas-to-Gasoline STG+® system takes place in a continuous gas-phase closed loop, with no intermediate condensation 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.

To view our gasoline brochure, click here

Feed Gas Type Liquid Product Feed Gas Flow MMSCF/D Feed Gas Flow NM^3/D Production Capacity
Natural Gas Gasoline 4-5 110,000-130,000 500 bpd
Natural Gas Gasoline 17-20 450,000-540,000 2000 bpd
Syngas Gasoline 17-20 450,000-540,000 500 bpd
Syngas Gasoline 68-80 1.8-2.1 million 2000 bpd
Natural Gas Methanol 4-5 110,000-130,000 160 mt/d
Natural Gas Methanol 17-20 450,000-540,000 640 mt/d