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Gas Filter & Filtration Systems

Petro Techna’s filtration systems are designed to eliminate mist, fog, scale and dust particles less than two microns in size and are available in vertical or horizontal configurations. Our filters provide easy access for servicing the filter elements.

Typical units include:

  • Filter Separator Gas-Dust Gas-Liquid
  • Activated Carbon Filters
  • Coalescers
  • Desanders


Gas Sweetening Systems


Natural gas condensate, whether produced from a condensate field or an associated gas from an oil deposit, usually contains water and frequently contains Hydrogen Sulphide (H2S) and/or Carbon Dioxide (CO2). Gases containing H2S or CO2 are classified as sour, and gases free from H2S and CO2 are called sweet. With increasing demands for natural gas, natural gases containing H2S are also being tapped for utilization after purification. Natural gas that is transported to the fuel market must meet legal requirements, which specify a maximum H2S content less than 4 ppm in the gas. These requirements are justified, since H2S is a toxic gas, and its combustion product is sulfur dioxide or trioxide. Besides emitting a bad odor at low concentrations, H2S is deadly, poisonous, and at concentrations above 600 ppm it can be fatal in just three to five minutes. Its toxicity is comparable to cyanide. Thus, it cannot be tolerated in gas that would be used as domestic fuel. Further, H2S is corrosive to all metals normally associated with gas transporting, processing and handling systems, and may lead to premature failure of most such systems.

Petro Techna designs and manufactures efficient sweetening systems capable of H2S removal. There are three distinct categories of removal systems designed and manufactured by Petro Techna. They are based on the following processes:

  • Solid to Gas – These processes are applicable for removal of low concentration sulfur compounds in gas or liquid e.g. Iron-Oxide process. This type of system is most economical on process streams containing relatively large amounts of CO2 and less than 2000 PPM sulfur.
  • Liquid to Liquid – These processes are used for treating gas liquids streams and are similar in design to the systems below used for treating gas streams e.g. Caustic wash, Merox process, Amine process, Molecular sieve process.
  • Liquid to Gas – These processes have the greatest potential for treatment of sour gas streams. Once the H2S level exceeds 2000 PPM, this process is the only way to go. These processes utilize TEA, DEA, MEA, MDEA, Diglycolamine, Sulphinol, etc.


Natural Gas Liquid (NGL) Recovery

The Natural Gas Liquid (NGL) Recovery and Gas Processing System offered by Petro Techna is the result of many years of engineering design and testing. This system is capable of recovering salable hydrocarbon liquids from gas streams and processing the gas to pipeline specifications. The process design utilizes the same basic equipment components as standard refrigeration liquids recovery/gas processing systems. However, the mechanical design utilizes the following new methods to maximize liquid recovery:

  • Improved heat transfer
  • Integrated process components
  • Improved refrigeration design
  • Optimization of process conditions

Some typical applications of our NGL recovery system include locations where associated gas is currently being flared and in sites where rich gas is being sold without appropriate compensation for liquids. It may also be deployed to satisfy gas conservation requirements.



Petro Techna provides glycol dehydration systems in standard or custom designs. With custom designs, glycol purity of 99.95% can be achieved. Dependable field-proven components are used for maximum performance at minimum cost.

Typical units include:

  • Triethylene Glycol (TEG)/Monoethylene Glycol (MEG)
  • Glycol-Gas Dryers
  • Dry Dessicant-Gas Dryers
  • Liquid Dryers
  • Air Dryers
  • CO2 Dryers