CHEMISTRY, PETROCHEMISTRY & ENVIRONMENTAL TECHNOLOGY
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The purchase of benzene credits to offset benzene levels in gasoline in excess of 0.62 vol.% is an expensive method to compensate for suboptimal control of the reformer feed. To minimize the formation of benzene, Naphtha Splitters are utilized for optimal fractionation between Benzene and Heptane (i.e. C7’s).
Optimal fractionation in the Naphtha Splitter requires qualitative analysis of Benzene in the reformer feed and C7’s in the isomerization feed. Located before the Reformer, the tec5USA Raman Online Raman Analyzer and Tidus XP Probe identifies benzene content in heavy Naphtha before sending the feed to the Reformer. Measurement before the Isomerization feed allows for the quantitative measurement of molecules with 7 carbon atoms or greater. Monitoring the reformer and isomerization feed enables immediate optimalization of the reboiler and reflux duties via closed-loop control.
Traditional methods for monitoring key parameters within the refinery, and more specifically within the Naphtha Splitter, include differential pressure, differential temperature, laboratory analysis and online Gas Chromatography (GC). These techniques introduce drawbacks such as inaccuracy, significant lag-time, and high maintenance. In contrast to these methods, Raman Spectroscopy, with the tec5USA Raman Analyzer, is a cost-effective, immediate, and accurate method for optimizing the performance of the Naphtha Splitter and improving the fractionation of Benzene and Heptane (C7’s), by providing immediate and accurate chemical analysis at the point of insertion.
FAQ
Typical applications include white light interference for thin film analysis, UV absorption of proteins for quantitative analysis, colorimetry, impurity detection in water, cleaning validation for API manufacturing, polymerization inhibitor monitoring, electroplating bath monitoring....
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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