APG treatment up to fuel gas requirements

In remote and small oil fields, associated petroleum gas currently is often diverted to flares due to impossibility of its on-site disposal. This is explained by its low methane number (methane index) and the high content of heavy hydrocarbons rendering impossible its transportation or use as a fuel for gas-fired reciprocating plants and gas turbine power plants without preliminary treatment, as well as by unprofitability of processing relatively small volumes of such gas with the use of conventional techniques.

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APG treatment up to fuel gas requirementsAPG treatment up to fuel gas requirementsAPG treatment up to fuel gas requirementsAPG treatment up to fuel gas requirements
General informationApplicationBooklets

General information

Grasys membrane hydrocarbon plants allow dramatically adjusting the properties of such gas through the removal of a large part of heavy hydrocarbons (C4+). Thereby, methane is mainly concentrated in the retentate with a 0.5–4.0 bar pressure drop against the feed flow pressure, which is especially important in fuel gas the treatment for gas-fired reciprocating plants. Additionally, membrane plants allow reducing the content of sulfur-bearing impurities in the fuel gas and completely excluding aerosols, condensed moisture and solid particles.

The degree of fuel gas treatment may vary significantly depending on the feed gas quality and the requirements set with regard to the product gas.

Application

The use of Grasys membrane technology allows significantly improving fuel gas quality by

  • Increasing the gas methane number (index) by 15–60 units
  • Reducing the C4+ contents by 2.5–6 times, with the residual content of less than 2.0% vol.
  • Reducing the C5+ contents by 6–12 times, with the residual content of less than 0.5% vol.
  • Increasing the methane content by 8–20% vol., and in some cases by 35–40% vol.
  • Reducing water dew point and hydrocarbon dew point by 15–60 °C

The use of Grasys membrane technology ensures

  • Gas-fired reciprocating plants and gas turbine power plants operation at 100% nominal capacity, with the power output increase by 15–40%
  • Reduction in gas temperature of the delivered gas-fired reciprocating plants (gas turbine power plants) up to the minimum values (+10…+15 °C)
  • Excluding the possibility of fuel detonation
  • Recovery of product gas compliant with GOST 5542–87 and OST 51.40–93
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