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Zaheer Juddy

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Innovation in Analytical Techniques
Zaheer Juddy

Zaheer Juddy

Managing Director, AIMS

Mr. Zaheer Juddy, MD of Analytical Instrumentation & Maintenance system (AIMS) and one of the brightest young entrepreneur in the region and brings with him a vast experience of over 19 years in Analytical field. Being an Analyzer Expert provides consultancy and training's to Endusers/Customers from oil and gas industry.

Mr. Zaheer has taken several initiatives for introducing new Technologies, Applications and Analyzer Sampling System designs for online Analyzers.

The Tunable Filter Spectrometer (TFS), an innovative Technology

Innovation in Analytical Techniques

Abstract: Since long, the Oil & Gas industry is in quest of a simple, low-cost, field-deployable alternative to the traditional gas chromatography for its various measurements points, particularly over the last few years due to the widespread increase of smaller plants. Moreover, the cost of servicing, calibration gases, carrier-gases and maintenance of sampling systems of the traditional gas chromatograph type instruments is significant.

On other hand, Infrared absorption spectroscopy for natural gas composition measurement has long been envisioned and investigated by various groups. Its advantages from operational perspectives over gas chromatography is clear. However, several technical challenges have prevented its use in industrial settings. The biggest challenge has to do with the overlapping nature of hydrocarbon spectra. Although the spectra of C2 – C4 alkanes are unique, they are overlapping. There are not isolated peaks for simple “peak analysis” algorithm, but rather, a more sophisticated “pattern recognition” algorithm or chemometrics is required.

The TFS also known as optical analyzer is an alternative to gas chromatographs, and infrared absorption spectroscopy is a well proven technology in various online process industries.

The Tunable Filter Spectrometer (TFS) platform is based upon Infrared absorption is an optical technology that has been well accepted at various on-line process industrial gas/liquid measurement applications from combustion analysis to beverage process monitoring. Infrared absorption spectroscopy analyzes the absorption of light as it interacts with the sample. It could provide fast measurement (seconds), a simple flow-through sampling, and without the need for carrier gas or any other consumables. In addition, it is a direct measurement based on first-principle (not a comparative or correlative technique), providing robust, stable and repeatable measurement.

In general, the system consists of a light source, a sample cell (for gases, liquids or solids), a wavelength separating element (spectrometer) and a photo-detector, The wavelength separating element “slices” the wavelength components of the broadband light source which then interacts with the sample molecules. Some of the wavelength components are absorbed and some are transmitted through without any absorption. The resulting spectrum is called absorption spectrum, which acts as “fingerprints” which can then be used to identify the sample components and/or quantify the composition of the sample.

The TFS due to its low operation cost, reliability and improved availability is gaining importance for the applications wherever it is suitable.

This paper will highlight basis of TFS technology and will cover the possible applications along with Life Cycle Cost comparison with other technologies.

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