Natural gas is a complex mixture of gaseous hydrocarbons, with methane and ethane typically being the most predominant. In natural gas, concentrations of the individual various hydrocarbon components can vary greatly.
In natural gas, heavier hydrocarbons are extracted to produce a purer dry methane for consumers, while natural gas liquids are utilized as chemical feedstock. Raman spectroscopy is ideally suited for qualitative and quantitative detection of the main components of natural gas, such as methane, propane and butane. This can be used to perform screening analysis in real-time to ensure the quality of natural gas does not deteriorate or the chemical composition does not vary excessively, which may affect the energy density of the gas.
Raman Spectroscopy Solution
Use of the tec5USA Raman Spectrometer System and RFP 465 multipass gas probe to measure refining products allow for a response in seconds. The system allows for the simultaneous measurement of several components without additional probe installations. The maintenance requirement of the sampling system is eliminated, as the probe is directly inserted into the flowing product line. The lockout, tagout (LOTO) system, 35 – 500 mW adjustable laser, robust design and explosion-proof enclosure allows for a safe and seamless integration to the site location and DCS/SCADA system.
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The spectroscopic methodology is determined by which parameters are important to monitor during a process. For example, if you want to monitor protein concentration in a bioreactor, in which the biosynthesis takes place in an aqueous medium, then you likely would want to use Raman spectroscopy for the application, as water does not contribute to the Raman signal. Alternatively, if moisture content is important, water has very strong absorption in the NIR due to several vibrational and combination modes that can be monitored; water is transparent in the UV and visible spectral region. Understanding which chemical is important as there could be various factors that influence the choice of methodology....
NIR spectroscopy is utilized across a variety of industries for qualitative and quantitative product analysis. Typical industries include Chemistry, Pharmacology, Food Feed & Beverage, Agriculture, and others. NIR spectroscopy is well suited for species containing C-H, N-H & O-H bonds, making it a wide-range technology for a variety of applications such as moisture, fat, oil, alcohol, APIs, polymers, etc....
Raman spectroscopy is a technique which is used for several markets. These industries include Oil and Gas, Pharmacology, Biotechnology, Petrochemistry and many others. Due to the high selectivity of Raman spectroscopy, it is a powerful tool for many applications including, hydrocarbon analysis, bioreactor protein monitoring, crystallization monitoring, API concentration, polymer identification, surfactant analysis, natural gas components and several others....
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