Fluid Handling Technology News & Innovations
Natural gas processing is a complex industrial purification method used on raw natural gas after it is extracted from a well. Processing is necessary to purify the extracted natural gas.
Methane is the gas found in natural gas, and natural gas processing is used to remove other gases and impurities. Natural gas processing can occur either before pipeline transportation or afterwards.
A gas processing plant encompasses the equipment between the gas wells and the pipeline or other transportation methods.
The purpose of the gas processing plant is to remove the impurities and contaminants from the gas, remove solids and liquids, and prepare the gas to meet the specific sales requirements of the purchaser.
Gas processing consists of the separation of all of the various hydrocarbons, non-hydrocarbons (such as carbon dioxide and hydrogen sulfide), and fluids from the methane.
The gas processing plant takes the raw material (natural gas, pipeline condensate, water, hydrogen sulfide, and sulfur) and generates intermediate products (raw make, plant condensate, natural gasoline, and ethane-propane streams) and finished products (transmission quality natural gas, butane, and propane).
The natural gas process depends on the location and composition of the raw gas and the application of the gas by the end-users.
The processing of natural gas to pipeline dry gas quality levels can be very complex, but commonly involves these main processes to remove the various impurities:
Removal of large particles - The first step of natural gas processing is to remove the biggest impurities, for example sand, with scrubbers. Heaters ensure that the temperature does not fall below a certain level.
Oil, condensate and water removal - Then the oil, gas, and water are separated from one another. The gas in this state can still have sulfur in it, and is called sour gas. Sending the natural gas through a pipeline in this state is undesirable because corrosion can occur due to the sulfur.
Sulfur and carbon dioxide removal - Therefore, the next step is to remove the sulfur and carbon dioxide from the natural gas.
Separation of natural gas liquids - One of the final steps of natural gas processing is known as natural gas liquid recovery, where many of the hydrocarbons besides methane are removed and collected.
The collected liquids serve many uses and can be quite valuable. These hydrocarbons include, but are not limited to, propane, butane, and ethane.
The gas to liquid process (GTL) can be defined as the process that converts natural gas into high-quality liquid products that would otherwise be made from crude oil. These liquid products include motor oils, transport fuels, and the ingredients for everyday necessities like plastics, detergents, and cosmetics.
The natural gas processing facilities consist of a number of different gas processing units, but all typically have:
Inlet receiving and/or compression
Although there are many options for processing natural gas, no one option is best for all circumstances.
Important considerations when choosing the correct processing method are:
In many cases, the best answer ends up being multiple processing options that change over time as the field develops and then matures due to inlet volume and composition fluctuations.
Gas processing companies strive to optimize production and minimize downtime and operational cost, while maintaining safe operation. For this purpose, these gas processing systems must meet stringent process control requirements, while being reliable and scalable.
Gas processing companies must find ways to improve plant efficiency and increase throughput without commissioning a complete plant overhaul. Integration of information technology and upgraded operations technology systems can be a cost-effective way to achieve the production visibility that is required to improve efficiencies.
The natural gas industry has, from its outset, always been wide open to innovation and every kind of modern technology. Technological advances have constantly shaped and re-shaped every stage of the industry, from exploration right through to final usage.
Scientists, researchers, and engineers need to keep up to date with technology and business information for the natural gas industry, including shale gas, LNG, CNG, gas processing and gas production.
Innovative gas treatment technologies promise to reduce energy consumption. These gas processing innovations could revolutionize the fuel market.
The importance of filtration in the optimization of gas processing systems is emphasised in a new whitepaper, authored by inhouse experts from Celeros Flow Technology (Celeros FT).
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