3 Nov, 2016
Charts and Correlation for Estimating Methanol Removal in TEG Gas Dehydration Process
Continuing the October 2010 tip of the month (TOTM), in this TOTM we will consider the presence of methanol in the produced oil/water/gas stream and determine the quantitative traces of methanol ending up in the TEG dehydrated gas.
Read More >4 Oct, 2016
Charts and Correlations for Estimating Methanol Removal in the Gas Sweetening Process
The gas-sweetening process by amines like methyldiethanolamine (MDEA) removes a considerable amount of methanol from a sour gas stream. Moreover, if the methanol content of the sour gas is high, the sweet gas may still retain high methanol content and can cause operational troubles in the downstream processes.
Read More >7 Sep, 2016
Estimating Methanol Removal in the NGL Sweetening Process
Similar to the gas-sweetening process, the methyldiethanolamine (MDEA) liquid-sweetening process removes a considerable amount of methanol from a sour NGL (Natural Gas Liquid) stream. Moreover, if the methanol content of the sour NGL is high, the sweetened NGL may still retain high methanol content and can cause operational troubles in the downstream processes. Provisions of purging reflux (Water Draw) of the regenerator column and its replacement with “Fresh Water” can improve methanol recovery.
Read More >2 Aug, 2016
Determining Traces of Methanol in the NGL Sweetening Process
Similar to the July 2016 TOTM, this tip will consider the presence of methanol in the sour NGL stream and determine the quantitative traces of methanol ending up in the sweet NGL, flash gas and acid gas streams.
Read More >1 Jul, 2016
Determining Traces of Methanol in the Gas Sweetening Process
This tip will consider the presence of methanol in the sour gas stream and determine the quantitative traces of methanol ending up in the sweet gas, flash gas and acid gas streams. To achieve this, the tip simulates a simplified MDEA gas sweetening unit by computer.
Read More >6 Jun, 2016
Projecting the Performance of Adsorption Dehydration Process
PetroSkills | John M Campbell’s May 2015 tip of the month (TOTM) presented a method which allows the users to estimate the decline of their adsorbent based on only one performance test run (PTR) for molecular sieve dehydrators using low pressure regeneration. This permits early formulation of a credible action plan. Site-specific factors will determines an adsorption unit’s decline curve. Consequently, conducting more than PTR is highly recommended. A poorly performing inlet separator, for example, could result in a unit exhibiting a more pronounced decline than indicated by the generic performance decline curves.
Read More >2 May, 2016
Benefits of Having Side Water-Draw in a Condensate Stabilizer Column – Part 2
This tip is the follow up of the previous tip (April 2016) which investigated the benefits of having a water-draw in a condensate stabilizer column. It will use a commercial simulation software to simulate the performance of an operating stabilizer. In order to take into account the non-ideality of water, the tip will perform three-phase (vapor, liquid hydrocarbon, and aqueous phases) calculations on the trays with excessive water rates. Specifically, it will study the influence of the column temperature profile and water partial pressure profile on the optimum location of water-draw tray in the column. It will also study the impact of the upstream 3-phase separator temperature on the reboiler, condenser, feed-stabilized condensate heat exchanger duties, and the reflux pump power. The tip will present a summary of the computer simulation results and the key diagrams for the same case study.
Read More >4 Apr, 2016
Benefits of Having Side Water-Draw in a Condensate Stabilizer Column: Part One
This tip will investigate the benefits of having a water-draw in a condensate stabilizer. It will use a commercial simulation software to simulate the performance of an operating stabilizer. In order to take into account the non-ideality of water, the tip will perform three-phase (vapor, liquid hydrocarbon, and aqueous phases) calculations on the trays with excessive water rates.
Read More >4 Mar, 2016
What is the Impact of Light Hydrocarbons on the Natural Gas Hydrate Formation Conditions?
This tip will extend the previous studies on the natural gas hydrate formation phase behavior. Specifically, it will study the impact of light hydrocarbons on the formation of hydrate in a natural gas mixture.
Read More >4 Feb, 2016
Correlations for Conversion between True and Reid Vapor Pressures (TVP and RVP)
Accurate measurement and prediction of crude oil and natural gas liquid (NGL) products vapor pressure are important for safe storage and transportation, custody transfer, minimizing vaporization losses and environmental protection. Vapor pressure specifications are typically stated in Reid Vapor Pressure (RVP) or/and True Vapor Pressure (TVP). In addition to the standard procedures for their measurements, there are rigorous and shortcut methods for their estimation and conversion.
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