Gas-To-Methanol STG+®

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 is easy to operate, is not labor intensive, and requires little maintenance as our catalyst lifetime is >5 years. It 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.

 

Basic 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 30gpm
  • 3MW of inexpensive power capacity
  • Ability to operate 24/7/365 as operating capacity is >95%

 

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.
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