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Application Brief: Measuring THT in Natural Gas

Natural gas for direct consumption is odorized for safety reasons. In the odorizing process, a substance with extremely high odor is added to natural gas in a controlled method. The odorized natural gas is then transmitted via pipelines into crowded urban settings and eventually into homes, schools, and workplaces.

In many cases, the smell of the gas is the only mechanism for leak detection and prevention of catastrophic explosions. Mercaptans are often used as odorants due to their low odor threshold. In Europe, tetrahydrothiophene (THT) is commonly used. Since the pipeline material absorbs some of the odorant out of the natural gas stream, the THT level is continuously monitored to ensure the gas is adequately odorized throughout the pipeline.

Continue reading: http://aai.solutions/news/measuring-tht-natural-gas/

Product page: http://aai.solutions/oma-odorant-analyzer
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5/24/18
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Detecting the Interface Between Sequential Compounds in a Pipeline

When you move different chemicals in sequence through a single pipeline, you often need to detect the interface — the transition point between one chemical product and the next.

For example, when crossing over between batches of diesel, you will need to divert the stream for reprocessing to a holding tank. The amount that will be sent for reprocessing should be minimized to meet product specifications. Reliable interface detection is critical to maintain efficiency and product quality.

The OMA instantly detects the interface by watching for change in the aromatic optical fingerprint of the product flowing through the pipeline. Using high-resolution UV spectrophotometry, the OMA measures the absorbance of aromatic hydrocarbons present in the chemical product.

Any change in the aromatic fingerprint is an instant indicator that the interface has arrived. There’s no need for chemical tracers or artificial coloring to identify batches — the OMA monitors change directly in the composition of the pipeline fluid.

Another important application is dye interface in a pipeline: in many countries, fuel products legally must be dyed to distinguish between taxed use and non-taxed use. In the US, for example, heating oil (non-taxed) is dyed red to deter people from using it as jet fuel (taxed), even though they are essentially the same chemical product.

The OMA can be easily implemented to monitor dye interface in a pipeline. When color changes between product batches, the OMA instantly recognizes and confirms a change in the UV-Vis absorbance spectrum directly in the pipeline. This enables operators to automate their adherence to local tax laws while reducing the labor/efficiency costs of these regulations.

Documents:

http://aai.solutions/…/AA_AN021_Monitoring-Interface-Betwee…

http://aai.solutions/…/AA_AN007_Measuring-Aromatic-Hydrocar…
http://aai.solutions/documents/AA_DS001A_OMA300.pdf

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Happy Lunar New Year!
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Sending You Wishes of Joy, Peace and Prosperity, this Holiday Season and Throughout the New Year

From All of Us Here at Applied Analytics
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Send Us Your Dark, Your Complex, Your Viscous Samples! Our Headspace System is Now Patented. http://aai.solutions/news/industrial-process-stream-compositional-headspace-analysis/

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New video! Check out our demo of the OMA-406 Rackmount Analyzer, covering: hardware, software, theory and applications. http://aai.solutions/news/whats-19-inches-wide-and-measures-up-to-5-chemicals-at-once/
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And we also have BTEX Measurement in Pre-liquefied Natural Gas demonstration translated in Portuguese.

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Now we have Total Sulfur Measurement in Pre-liquefied Natural Gas demonstration translated in Portuguese now.

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Benzene, Toluene, Ethyl benzene and Xylenes (BTEX) are common impurities in natural gas which must be removed before sending the gas down a pipeline or before liquefaction to LNG. Environmental policy limits the amount of BTEX allowed in natural gas due to its carcinogenic properties and liability to freeze in liquefaction equipment. AAI’s OMA-300 can measure BTEX in natural gas to confirm compliance with environmental regulations and protect downstream equipment where it is liable to freeze.
http://aai.solutions/applications/lng-liquefied-natural-gas-analysis
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