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General schematic of flare gas recycling unit provided [12].

General schematic of flare gas recycling unit provided [12].

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Figure 1-1: A picture of a real flaring gases from an oil platform in...
Figure 1-2: Components of a general flare system [4,5,6].
Figure 1-3: Comparison of methane parameters for common fuel gas [8].
Figure 1-4: Schematic diagram of LPG membrane and hydrogen recovery...
+17 Figure 1-5: Schematic of liquefied natural gas recovery cycle from...
Nitrogen, Methane and Ethane Recovery from a Domestic Petrochemical Flare Gas by Using Pressure Swing Adsorption System
Thesis
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  • Aug 2018
The main object of this project was to applying a pilot plant to simultaneously nitrogen, methane and ethane separation from a flare gas in a domestic industrial petrochemical unit. In order to realization of experimental section, a two-stage semi-industrial unit was set-up in FAPKCO Engineering Group of Iran with a length of 70 cm, an i.d. of 4.5...
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... They reported that the rate of return for liquefaction unit and LPG production unit is more than 200% for different scenarios and is higher than compression. In 2018, Shokroo applied a PSA pilot plant to simultaneously nitrogen, methane and ethane separation from a flare gas in a domestic industrial petrochemical unit [27]. His PSA unit consists of a 6-step cycle including steps as: pressurization with feed, adsorption, equalization to depressurization, blow down, purge and equalization to pressurization. ...
Hydrogen and carbon dioxide recovery from the petrochemical flare gas to methanol production using adsorption and absorption combined high-efficient method
Article
Full-text available
  • Jul 2019
Today, one of the challenging issues all over the world is the global warming which can be attributed to the emission of greenhouse gases into the environment as well as burning of gases in flare gas stream of industrial units. The latter can not only cause environmental problems but also is accompanied by wasting a great deal of energy. To deal with the aforementioned issue, the flare gas stream can be recycled after separating some species. In this investigation, the objective is to separate CO2 and H2 from the flare gas in addition to methanol production. In this regard, a separation with sorbent/solvent method is used which is divided into two stages: (1) H2 separation by sorbent, (2) CO2 separation by monoethanolamine solvent. From the obtained results in this study, in the first stage, H2 and CO2 can be purified up to 75% and 99.83%, respectively. Beside, methanol synthesis is compared in three different cases: (1) industrial unit, (2) CO2 is fed into the reactor instead of CO, and (3) CO2 and H2 are fed to the reactor with stoichiometric coefficients. The obtained methanol production of the case (1) is approximately close to that of the case (3) and it is reduced 4% in case (3). Graphic abstract Open image in new window
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